Data Sheet
January 2002
DSP1629 Digital Signal Processor
1 Features
s
Optimized for mobile communications applications
with a bit manipulation unit for higher coding effi-
ciency.
s
On-chip, programmable, PLL clock synthesizer.
s
10 ns and 16.7 ns instruction cycle times at 3.0 V,
and 19.2 ns and 12.5 ns instruction cycle times at
2.7 V.
s
Mask-programmable memory map option: the
DSP1629x16 features 16 Kwords on-chip dual-port
RAM. The DSP1629x10 features 10 Kwords on-
chip dual-port RAM. Both feature 48 Kwords on-
chip ROM with a secure option.
s
Low power consumption:
-- <1.9 mW/MIPS typical at 2.7 V.
s
Flexible power management modes:
-- Standard sleep: 0.2 mW/MIPS at 2.7 V.
-- Sleep with slow internal clock: 0.7 mW at 2.7 V.
-- Hardware STOP (pin halts DSP): <20
A.
s
Mask-programmable clock options: small signal
and CMOS.
s
100-TQFP package, providing excellent second-
level reliability.
s
Sequenced accesses to X and Y external memory.
s
Object code and pin compatible with the DSP1627.
s
Single-cycle squaring.
s
16 x 16-bit multiplication and 36-bit accumulation in
one instruction cycle.
s
Instruction cache for high-speed, program-efficient,
zero-overhead looping.
s
Dual 25 Mbits/s serial I/O ports with multiprocessor
capability:
-- 16-bit data channel, 8-bit protocol channel.
s
8-bit parallel host interface:
-- Supports 8-bit or 16-bit transfers.
--
Motorola
or
Intel
compatible.
s
8-bit control I/O interface.
s
256 memory-mapped I/O ports.
s
IEEE
P1149.1 test port (JTAG boundary scan).
s
Full-speed in-circuit emulation hardware develop-
ment system on-chip.
s
Supported by DSP1629 software and hardware
development tools.
2 Description
The DSP1629 is Agere Systems Inc.'s first digital signal
processor offering 100 MIPS operation at 3.0 V and
80 MIPS operation at 2.7 V with a reduction in power
consumption. Designed specifically for applications re-
quiring low power dissipation in
mobile communica-
tions systems, the DSP1629 is a signal-coding device
that can be programmed to perform a wide variety of
fixed-point signal processing functions. The device is
based on the DSP1600 core with a bit manipulation unit
for enhanced signal coding efficiency. The DSP1629 in-
cludes a mix of peripherals specifically intended to sup-
port processing-intensive but cost-sensitive
applications in the area of digital wireless communica-
tions.
The DSP1629x16 contains 16 Kwords of internal dual-
port RAM (DPRAM), which allows simultaneous access
to two RAM locations in a single instruction cycle. The
DSP1629x10 supports the use of 10 Kwords of
DPRAM. Both devices contain 48 Kwords of internal
ROM (IROM).
The DSP1629 is object code compatible with the
DSP1627 while providing more memory. The DSP1629
is pin compatible with the DSP1627. Note that TRST
(JTAG test reset) replaces a V
DD
pin.
The DSP1629 supports 2.7 V and 3.0 V operation and
features flexible power management modes. Several
control mechanisms achieve low-power operation, in-
cluding a STOP pin for placing the DSP into a fully stat-
ic, halted state, and a programmable power control
register used to power down unused on-chip I/O units.
These power management modes allow for trade-offs
between power reduction and wake-up latency require-
ments. During system standby, power consumption is
reduced to less than 20
A.
The on-chip clock synthesizer can be driven by an ex-
ternal clock whose frequency is a fraction of the instruc-
tion rate.
The device is packaged in a 144-pin PBGA, a 100-pin
BQFP, or a 100-pin TQFP, and is available with 10 ns
and 16.7 ns instruction cycle times at 3.0 V, and 19.2 ns
and 12.5 ns instruction cycle times at 2.7 V.
Data Sheet
DSP1629 Digital Signal Processor
January 2002
2
Agere Systems Inc.
Table of Contents
Contents
Page
Contents
Page
1
Features.............................................................. 1
2
Description .......................................................... 1
3
Pin Information.................................................... 3
4
Hardware Architecture ........................................ 8
4.1
DSP1629 Architectural Overview ............. 8
4.2
DSP1600 Core Architectural Overview .. 11
4.3
Interrupts and Trap ................................. 12
4.4
Memory Maps and Wait-States .............. 17
4.5
External Memory Interface (EMI)............ 20
4.6
Bit Manipulation Unit (BMU) ................... 21
4.7
Serial I/O Units (SIOs) ............................ 21
4.8
Parallel Host Interface (PHIF)................. 23
4.9
Bit Input/Output Unit (BIO)...................... 24
4.10
Timer ...................................................... 25
4.11
JTAG Test Port....................................... 25
4.12
Clock Synthesis ...................................... 27
4.13
Power Management ............................... 30
5
Software Architecture ....................................... 37
5.1
Instruction Set......................................... 37
5.2
Register Settings .................................... 46
5.3
Instruction Set Formats .......................... 56
6
Signal Descriptions ........................................... 62
6.1
System Interface..................................... 62
6.2
External Memory Interface ..................... 64
6.3
Serial Interface #1 .................................. 65
6.4
Parallel Host Interface or Serial
Interface #2 and Control I/O Interface .... 66
6.5
Control I/O Interface ............................... 66
6.6
JTAG Test Interface ............................... 67
7
Mask-Programmable Options ........................... 68
7.1
Input Clock Options ................................ 68
7.2
Memory Map Options ............................. 68
7.3
ROM Security Options............................ 68
8
Device Characteristics ...................................... 69
8.1
Absolute Maximum Ratings.................... 69
8.2
Handling Precautions ............................. 69
8.3
Recommended Operating Conditions .... 69
8.4
Package Thermal Considerations .......... 70
9
Electrical Characteristics and Requirements .... 71
9.1
Power Dissipation................................... 74
10 Timing Characteristics for 3.0 V Operation ....... 76
10.1
DSP Clock Generation
(3.0 V Operation) .................................... 77
10.2
Reset Circuit (3.0 V Operation)............... 78
10.3
Reset Synchronization (3.0 V Operation) 79
10.4
JTAG I/O Specifications
(3.0 V Operation) .................................... 80
10.5
Interrupt (3.0 V Operation)...................... 81
10.6
Bit Input/Output (BIO)
(3.0 V Operation) .................................... 82
10.7
External Memory Interface
(3.0 V Operation) .................................... 83
10.8
PHIF Specifications (3.0 V Operation).... 87
10.9
Serial I/O Specifications
(3.0 V Operation) .................................... 93
10.10 Multiprocessor Communication
(3.0 V Operation) .................................... 98
11 Timing Characteristics for 2.7 V Operation ....... 99
11.1
DSP Clock Generation
(2.7 V Operation) .................................. 100
11.2
Reset Circuit (2.7 V Operation)............. 101
11.3
Reset Synchronization
(2.7 V Operation) .................................. 102
11.4
JTAG I/O Specifications
(2.7 V Operation) .................................. 103
11.5
Interrupt (2.7 V Operation).................... 104
11.6
Bit Input/Output (BIO)
(2.7 V Operation) .................................. 105
11.7
External Memory Interface
(2.7 V Operation) .................................. 106
11.8
PHIF Specifications (2.7 V Operation).. 110
11.9
Serial I/O Specifications
(2.7 V Operation) .................................. 116
11.10 Multiprocessor Communication
(2.7 V Operation) .................................. 121
12 Outline Diagrams ............................................ 122
12.1
100-Pin BQFP (Bumpered Quad
Flat Pack).............................................. 122
12.2
100-Pin TQFP (Thin Quad Flat Pack)... 123
12.3
144-Pin PBGA (Plastic Ball Grid Array) 124
Data Sheet
January 2002
DSP1629 Digital Signal Processor
Agere Systems Inc.
3
3 Pin Information
Figure 1. DSP1629 BQFP Pin Diagram
DSP1629
20
9
30
90
80
70
V
SS
S
Y
NC1
DO
1
OLD1
OCK1
ICK1
ILD1
V
SS
DI
1
V
DD
IB
F1
OBE
1
DB
1
5
DB
1
4
DB
1
3
DB
1
2
DB
1
1
DB
1
0
DB
9
DB
8
DB
7
DB
6
DB
5
V
DD
V
SS
DB4
DB2
DB1
DB0
V
SS
IO
DB3
V
SS
V
DD
AB11
AB10
AB9
AB8
AB7
V
SS
ERAMHI
EROM
RWN
EXM
AB14
AB12
ERAMLO
V
DD
SADD1
DOEN1
OCK2/PCSN
DO2/PSTAT
SYNC2/PBSEL
ILD2/PIDS
OLD2/PODS
IBF2/PIBF
OBE2/POBE
DI2/PB1
V
SS
DOEN2/PB2
SADD2/PB3
TRST
IOBIT0/PB4
IOBIT1/PB5
IOBIT2/PB6
IOBIT3/PB7
VEC3/IOBIT4
VEC2/IOBIT5
VEC1/IOBIT6
VEC0/IOBIT7
V
SS
ICK2/PB0
V
SS
A
CK
I
2
CK
I
V
DDA
TD
O
TM
S
V
DD
CK
O
TR
A
P
S
TOP
IA
C
K
V
SS
INT
0
INT
1
AB
0
AB
1
AB
2
AB
3
AB
4
AB
5
AB
6
RSTB
TCK
10
0
V
DD
60
50
40
PIN #1
IDENTIFIER
ZONE
TDI
AB13
V
DD
AB15
10
11
12
13
8
7
6
5
4
3
2
1
14
15
16
17
18
19
21
22
23
24
25
26
27
28
29
31
32
33
34
35
36
37
38
39
41
42
43
44
45
46
47
48
49
51
52
53
54
55
56
57
58
59
61
62
63
64
65
66
67
68
69
71
72
73
74
75
76
77
78
79
81
82
83
84
85
86
87
88
89
91
92
93
94
95
96
97
98
99
5-4218 (F).c
Data Sheet
DSP1629 Digital Signal Processor
January 2002
4
Agere Systems Inc.
3 Pin Information
(continued)
Figure 2. DSP1629 TQFP Pin Diagram
V
DD
DB5
DB6
DB7
DB8
DB9
DB10
V
SS
DB11
DB12
DB13
DB14
DB15
V
DD
OB
E1
IB
F1
V
SS
DI
1
I
LD1
IC
K
1
OC
K
1
OL
D
1
DO
1
SYN
C1
V
SS
100
90
80
V
DD
AB
6
AB
5
AB
4
AB
3
AB
2
AB
0
INT1
INT0
V
SS
IA
CK
ST
OP
TRA
P
RS
T
B
CK
O
V
DD
TC
K
TM
S
TDO
TD
I
V
DD
A
CKI
CKI2
V
SS
A
AB
1
30
40
50
60
70
V
DD
SADD1
DOEN1
OCK2/PCSN
DO2/PSTAT
SYNC2/PBSEL
ILD2/PIDS
OLD2/PODS
IBF2/PIBF
OBE2/POBE
ICK2/PB0
V
SS
DOEN2/PB2
SADD2/PB3
TRST
IOBIT0/PB4
IOBIT1/PB5
IOBIT2/PB6
IOBIT3/PB7
VEC3/IOBIT4
VEC2/IOBIT5
VEC1/IOBIT6
VEC0/IOBIT7
V
SS
DI2/PB1
V
SS
DB4
DB3
DB2
DB1
DB0
IO
ERAMHI
V
DD
ERAMLO
EROM
RWN
V
SS
EXM
AB15
AB14
V
DD
AB13
AB12
AB11
AB10
AB9
AB8
AB7
V
SS
1
10
20
DSP1629
71
72
73
74
75
61
62
63
64
65
66
67
68
69
76
77
78
79
59
58
57
56
55
54
53
52
51
41
42
43
44
45
46
47
48
49
31
32
33
34
35
36
37
38
39
29
28
27
26
21
22
23
24
25
11
12
13
14
15
16
17
18
19
2
3
4
5
6
7
8
9
81
82
83
84
85
86
87
88
89
91
92
93
94
95
96
97
98
99
5-4219 (F).c
Data Sheet
January 2002
DSP1629 Digital Signal Processor
Agere Systems Inc.
5
3 Pin Information
(continued)
Note: Solder balls viewed through package.
Figure 3. 144-Pin Plastic Ball Grid Array (Top View)
5-5224 (C)
M
L
K
J
H
G
F
E
D
C
B
A
1
2
3
4
5
6
7
8
9
10
11
12
V
D DA
V
SSA
V
D D
V
SS
SPARE PACKAGE BALLS
SHOULD BE TIED TO
SOFT GND OR SIG GND
Data Sheet
DSP1629 Digital Signal Processor
January 2002
6
Agere Systems Inc.
3 Pin Information
(continued)
Functional descriptions of pins 1--100 are found in Section 6, Signal Descriptions. The functionality of CKI and CKI2
pins are mask-programmable (see Section 7, Mask-Programmable Options). Input levels on all I and I/O type pins
are designed to remain at full CMOS levels when not driven by the DSP.
*
3-states when RSTB = 0, or by JTAG control.
3-states when RSTB = 0 and INT0 = 1. Output = 1 when RSTB = 0 and INT0 = 0, except CKO, which is free-running.
Pull-up devices on input.
3-states by JTAG control.
** See Section 7, Mask-Programmable Options.
For SIO multiprocessor applications, add 5 k
external pull-up resistors to SADD1 and/or SADD2 for proper initialization.
Table 1. Pin Descriptions
PBGA Pin
BQFP Pin
TQFP Pin
Symbol
Type
Name/Function
B6, A6, B5, A5,
B4, A4, B3, A3,
B2, A2, A1, B1,
C2, C1, C3, D1
1, 2, 3, 4, 5, 7,
8, 9, 10, 11,
12, 15, 16, 17,
18, 19
88, 89, 90, 91,
92, 94, 95, 96,
97, 98, 99, 2,
3, 4, 5, 6
DB[15:0]
I/O* External Memory Data Bus 15--0.
D2
20
7
IO
O
Data Address 0x4000 to 0x40FF I/O Enable.
E1
21
8
ERAMHI
O
Data Address 0x8000 to 0xFFFF External RAM
Enable.
E2
23
10
ERAMLO
O
Data Address 0x4100 to 0x7FFF External RAM
Enable.
F1
24
11
EROM
O
Program Address External ROM Enable.
F2
25
12
RWN
O
Read/Write Not.
G1
27
14
EXM
I
External ROM Enable.
G2, H1, H2, J1,
J2, K1, K2, L1,
L2, M1, K3, M2,
L3, M3, L4, M4
28, 29, 31, 32,
33, 34, 35, 36,
37, 40, 41, 42,
43, 44, 45, 46
15, 16, 18, 19,
20, 21, 22, 23,
24, 27, 28, 29,
30, 31, 32, 33
AB[15:0]
O*
External Memory Address Bus 15--0.
L5
47
34
INT1
I
Vectored Interrupt 1.
M5
48
35
INT0
I
Vectored Interrupt 0.
L6
50
37
IACK
O*
Interrupt Acknowledge.
M6
51
38
STOP
I
STOP Input Clock.
L7
52
39
TRAP
I/O* Nonmaskable Program Trap/Breakpoint Indication.
M7
53
40
RSTB
I
Reset Bar.
L8
54
41
CKO
O
Processor Clock Output.
M8
56
43
TCK
I
JTAG Test Clock.
L9
57
44
TMS
I
JTAG Test Mode Select.
M9
58
45
TDO
O
JTAG Test Data Output.
L10
59
46
TDI
I
JTAG Test Data Input.
Mask-Programmable Input Clock Option
CMOS
Small Signal
L11
61
48
CKI**
I
CKI
VAC
M11
62
49
CKI2**
I
V
SSA
VCM
K10
65
52
VEC0/IOBIT7 I/O* Vectored Interrupt Indication 0/Status/Control Bit 7.
L12
66
53
VEC1/IOBIT6 I/O* Vectored Interrupt Indication 1/Status/Control Bit 6.
K11
67
54
VEC2/IOBIT5 I/O* Vectored Interrupt Indication 2/Status/Control Bit 5.
K12
68
55
VEC3/IOBIT4 I/O* Vectored Interrupt Indication 3/Status/Control Bit 4.
J11
69
56
IOBIT3/PB7
I/O* Status/Control Bit 3/PHIF Data Bus Bit 7.
J12
70
57
IOBIT2/PB6
I/O* Status/Control Bit 2/PHIF Data Bus Bit 6.
H11
71
58
IOBIT1/PB5
I/O* Status/Control Bit 1/PHIF Data Bus Bit 5.
H12
72
59
IOBIT0/PB4
I/O* Status/Control Bit 0/PHIF Data Bus Bit 4.
G11
73
60
TRST
I
JTAG Test Reset.
Data Sheet
January 2002
DSP1629 Digital Signal Processor
Agere Systems Inc.
7
3 Pin Information
(continued)
Functional descriptions of pins 1--100 are found in Section 6, Signal Descriptions.
*
3-states when RSTB = 0, or by JTAG control.
3-states when RSTB = 0 and INT0 = 1. Output = 1 when RSTB = 0 and INT0 = 0, except CKO, which is free-running.
Pull-up devices on input.
3-states by JTAG control.
** See Section 7, Mask-Programmable Options.
For SIO multiprocessor applications, add 5 k
external pull-up resistors to SADD1 and/or SADD2 for proper initialization.
Table 1. Pin Descriptions (continued)
PBGA Pin
BQFP Pin
TQFP Pin
Symbol
Type
Name/Function
G12
74
61
SADD2/PB3
I/O* SIO2 Multiprocessor Address/PHIF Data Bus Bit 3.
F11
75
62
DOEN2/PB2
I/O* SIO2 Data Output Enable/PHIF Data Bus Bit 2.
F12
77
64
DI2/PB1
I/O* SIO2 Data Input/PHIF Data Bus Bit 1.
E11
78
65
ICK2/PB0
I/O* SIO2 Input Clock/PHIF Data Bus Bit 0.
E12
79
66
OBE2/POBE
O* SIO2 Output Buffer Empty/PHIF Output Buffer
Empty.
D11
80
67
IBF2/PIBF
O* SIO2 Input Buffer Full/PHIF Input Buffer Full.
D12
81
68
OLD2/PODS
I/O* SIO2 Output Load/PHIF Output Data Strobe.
C11
82
69
ILD2/PIDS
I/O* SIO2 Input Load/PHIF Input Data Strobe.
C12
83
70
SYNC2/PBSEL I/O* SIO2 Multiprocessor Synchronization/PHIF Byte
Select.
C10
84
71
DO2/PSTAT
I/O* SIO2 Data Output/PHIF Status Register Select.
B12
85
72
OCK2/PCSN
I/O* SIO2 Output Clock/PHIF Chip Select Not.
B11
86
73
DOEN1
I/O* SIO1 Data Output Enable.
A12
87
74
SADD1
I/O* SIO1 Multiprocessor Address.
A11
90
77
SYNC1
I/O* SIO1 Multiprocessor Synchronization.
B10
91
78
DO1
O* SIO1 Data Output.
A10
92
79
OLD1
I/O* SIO1 Output Load.
B9
93
80
OCK1
I/O* SIO1 Output Clock.
A9
94
81
ICK1
I/O* SIO1 Input Clock.
B8
95
82
ILD1
I/O* SIO1 Input Load.
A8
96
83
DI1
I
SIO1 Data Input.
B7
98
85
IBF1
O* SIO1 Input Buffer Full.
A7
99
86
OBE1
O* SIO1 Output Buffer Empty.
D4, D5, D6, D7,
D8, E4, E5, E6,
E7, E8, E9, F4,
F5, F6, F7, F8,
F9, G4, G5, G6,
G7, G8, G9, H4,
H5, H6, H7, H8,
H9, J4, J5, J6, J7,
J8, J9
6, 14, 26,
38, 49, 64,
76, 89, 97
93, 1, 13,
25, 36, 51,
63, 76, 84
V
SS
P
Ground.
C4, C5, C6, C7,
C8, D3, D9, D10,
E3, E10, F3, F10,
G3, G10, H3,
H10, J3, J10, K4,
K5, K6, K7, K8,
K9
13, 22, 30,
39, 55, 88,
100
100, 9, 17,
26, 42, 75,
87
V
DD
P
Power Supply.
M10
60
47
V
DDA
P
Analog Power Supply.
M12
63
50
V
SSA
P
Analog Ground.
C9
--
--
--
--
No Die Connect--Unused.
Data Sheet
DSP1629 Digital Signal Processor
January 2002
8
Agere Systems Inc.
4 Hardware Architecture
The DSP1629 device is a 16-bit, fixed-point program-
mable digital signal processor (DSP). The DSP1629
consists of a DSP1600 core together with on-chip mem-
ory and peripherals. Added architectural features give
the DSP1629 high program efficiency for signal coding
applications.
4.1 DSP1629 Architectural Overview
Figure 4, DSP1629 Block Diagram, shows a block dia-
gram of the DSP1629. The following modules make up
the DSP1629.
DSP1600 Core
The DSP1600 core is the heart of the DSP1629 chip.
The core contains data and address arithmetic units,
and control for on-chip memory and peripherals. The
core provides support for external memory wait-states
and on-chip, dual-port RAM, and features vectored in-
terrupts and a trap mechanism.
Dual-Port RAM (DPRAM)
The DSP1629x16 contains 16 banks of zero wait-state
memory and the DSP1629x10 contains 10 banks of
zero wait-state memory. Each bank consists of 1K
16-bit words and has separate address and data ports
to the instruction/coefficient and data memory spaces.
A program can reference memory from either space.
The DSP1600 core automatically performs the required
multiplexing. If references to both ports of a single bank
are made simultaneously, the DSP1600 core automati-
cally inserts a wait-state and performs the data port ac-
cess first, followed by the instruction/coefficient port
access.
A program can be downloaded from slow, off-chip mem-
ory into DPRAM, and then executed without wait-states.
DPRAM is also useful for improving convolution perfor-
mance in cases where the coefficients are adaptive.
Since DPRAM can be downloaded through the JTAG
port, full-speed remote in-circuit emulation is possible.
DPRAM can also be used for downloading self-test
code via the JTAG port.
Read-Only Memory (ROM)
The DSP1629 contains 48K 16-bit words of zero wait-
state, mask-programmable ROM for program and fixed
coefficients.
External Memory Multiplexer (EMUX)
The EMUX is used to connect the DSP1629 to external
memory and I/O devices. It supports read/write opera-
tions from/to instruction/coefficient memory (X memory
space) and data memory (Y memory space). The
DSP1600 core automatically controls the EMUX. In-
structions can transparently reference external memory
from either set of internal buses. A sequencer allows a
single instruction to access both the X and the Y exter-
nal memory spaces.
Clock Synthesis
The DSP powers up with a 1X input clock (CKI/CKI2) as
the source for the processor clock. An on-chip clock
synthesizer (PLL) can also be used to generate the sys-
tem clock for the DSP, which will run at a frequency mul-
tiple of the input clock. The clock synthesizer is
deselected and powered down on reset. For low-power
operation, an internally generated slow clock can be
used to drive the DSP. If both the clock synthesizer and
the internally generated slow clock are selected, the
slow clock will drive the DSP; however, the synthesizer
will continue to run.
The clock synthesizer and other programmable clock
sources are discussed in Section 4.12, Clock Synthesis.
The use of these programmable clock sources for pow-
er management is discussed in Section 4.13, Power
Management.
Bit Manipulation Unit (BMU)
The BMU extends the DSP1600 core instruction set to
provide more efficient bit operations on accumulators.
The BMU contains logic for barrel shifting, normaliza-
tion, and bit field insertion/extraction. The unit also con-
tains a set of 36-bit alternate accumulators. The data in
the alternate accumulators can be shuffled with the data
in the main accumulators. Flags returned by the BMU
mesh seamlessly with the DSP1600 conditional instruc-
tions.
Bit Input/Output (BIO)
The BIO provides convenient and efficient monitoring
and control of eight individually configurable pins. When
configured as outputs, the pins can be individually set,
cleared, or toggled. When configured as inputs, individ-
ual pins or combinations of pins can be tested for pat-
terns. Flags returned by the BIO mesh seamlessly with
conditional instructions.
Serial Input/Output Units (SIO and SIO2)
SIO and SIO2 offer asynchronous, full-duplex, double-
buffered channels that operate at up to 25 Mbits/s (for a
20 ns instruction cycle in a nonmultiprocessor configu-
ration), and easily interface with other Agere Systems'
fixed-point DSPs in a multiple-processor environment.
Commercially available codecs and time-division multi-
plex (TDM) channels can be interfaced to the serial I/O
ports with few, if any, additional components. SIO2 is
identical to SIO.
Data Sheet
January 2002
DSP1629 Digital Signal Processor
Agere Systems Inc.
9
4 Hardware Architecture
(continued)
An 8-bit serial protocol channel may be transmitted in addition to the address of the called processor in multiproces-
sor mode. This feature is useful for transmitting high-level framing information or for error detection and correction.
SIO2 and BIO are pin-multiplexed with the PHIF.
*
These registers are accessible through the pins only.
16K x 16 for the DSP1629x16, 10K x 16 for the DSP1629x10.
Figure 4. DSP1629 Block Diagram
TDO
TCK
TMS
M
U
X
DSP1600 CORE
RWN
EXM
EROM ERAMHI
AB[15:0]
DB[15:0]
I/O
VEC[3:0] OR IOBIT[7:4]
DO2 OR PSTAT
OLD2 OR PODS
OCK2 OR PCSN
OBE2 OR POBE
SYNC2 OR PBSEL
ICK2 OR PB0
ILD2 OR PIDS
DI2 OR PB1
IBF2 OR PIBF
DOEN2 OR PB2
SADD2 OR PB3
IO BIT[3:0] OR PB[7:4]
CKI
CKI2
CKO
RSTB
STOP
TRAP
INT[1:0]
IACK
DI1
ICK1
ILD1
IBF1
DO1
OCK1
OLD1
OBE1
SYNC1
SADD1
DOEN1
EXTERNAL MEMORY INTERFACE & EMUX
ioc
DUAL-PORT
RAM
16K/10K x 16
ROM
48K x 16
ERAMLO
YAB
YDB
XDB
XAB
BMU
aa0
aa1
ar0
ar1
ar2
ar3
IDB
PHIF
phifc
PSTAT*
pdx0(IN)
pdx0(OUT)
BIO
sbit
cbit
SIO2
sdx2(OUT)
srta2
tdms2
sdx2(IN)
sioc2
saddx2
SIO
sdx(OUT)
srta
tdms
sdx(IN)
sioc
saddx
TIMER
timerc
timer0
HDS
BREAKPOINT*
JTAG
BOUNDARY SCAN*
jtag
JCON*
ID*
BYPASS*
TRACE*
powerc
TDI
pllc
TRST
5-4142 (F).f
Data Sheet
DSP1629 Digital Signal Processor
January 2002
10
Agere Systems Inc.
4 Hardware Architecture
(continued)
Table 2. DSP1629 Block Diagram Legend
Symbol
Name
aa<0--1>
Alternate Accumulators.
ar<0--3>
Auxiliary BMU Registers.
BIO
Bit Input/Output Unit.
BMU
Bit Manipulation Unit.
BREAKPOINT
Four Instruction Breakpoint Registers.
BYPASS
JTAG Bypass Register.
cbit
Control Register for BIO.
Dual-Port RAM
Internal RAM (16 Kwords for DSP1629x16, 10 Kwords for DSP1629x10).
EMUX
External Memory Multiplexer.
HDS
Hardware Development System.
ID
JTAG Device Identification Register.
IDB
Internal Data Bus.
ioc
I/O Configuration Register.
JCON
JTAG Configuration Registers.
jtag
16-bit Serial/Parallel Register.
pdx0(in)
Parallel Data Transmit Input Register 0.
pdx0(out)
Parallel Data Transmit Output Register 0.
PHIF
Parallel Host Interface.
phifc
Parallel Host Interface Control Register.
pllc
Phase-Locked Loop Control Register.
powerc
Power Control Register.
PSTAT
Parallel Host Interface Status Register.
saddx
Multiprocessor Protocol Register.
saddx2
Multiprocessor Protocol Register for SIO2.
sbit
Status Register for BIO.
sdx(in)
Serial Data Transmit Input Register.
sdx2(in)
Serial Data Transmit Input Register for SIO2.
sdx(out)
Serial Data Transmit Output Register.
sdx2(out)
Serial Data Transmit Output Register for SIO2.
SIO
Serial Input/Output Unit.
SIO2
Serial Input/Output Unit #2.
sioc
Serial I/O Control Register.
sioc2
Serial I/O Control Register for SIO2.
srta
Serial Receive/Transmit Address Register.
srta2
Serial Receive/Transmit Address Register for SIO2.
tdms
Serial I/O Time-division Multiplex Signal Control Register.
tdms2
Serial I/O Time-division Multiplex Signal Control Register for SIO2.
TIMER
Programmable Timer.
timer0
Timer Running Count Register.
timerc
Timer Control Register.
TRACE
Program Discontinuity Trace Buffer.
XAB
Program Memory Address Bus.
XDB
Program Memory Data Bus.
YAB
Data Memory Address Bus.
YDB
Data Memory Data Bus.
Data Sheet
January 2002
DSP1629 Digital Signal Processor
Agere Systems Inc.
11
4 Hardware Architecture
(continued)
Parallel Host Interface (PHIF)
The PHIF is a passive, 8-bit parallel port which can in-
terface to an 8-bit bus containing other Agere Systems'
DSPs, microprocessors, or peripheral I/O devices. The
PHIF port supports either
Motorola
or
Intel
protocols, as
well as 8-bit or 16-bit transfers, configured in software.
The port data rate depends upon the instruction cycle
rate. A 25 ns instruction cycle allows the PHIF to sup-
port data rates up to 11.85 Mbytes/s, assuming the ex-
ternal host device can transfer 1 byte of data in 25 ns.
The PHIF is accessed in two basic modes: 8-bit or
16-bit mode. In 8-bit mode, only the low byte is access-
ed. In 16-bit mode, the host determines an access of the
high or low byte. Software-programmable features al-
low for a glueless host interface to microprocessors
(see Section 4.8, Parallel Host Interface (PHIF)).
Timer
The timer can be used to provide an interrupt at the ex-
piration of a programmed interval. The interrupt may be
single or repetitive. More than nine orders of magnitude
of interval selection are provided. The timer may be
stopped and restarted at any time.
Hardware Development System (HDS) Module
The on-chip HDS performs instruction breakpointing
and branch tracing at full speed without additional off-
chip hardware. Using the JTAG port, the breakpointing
is set up and the trace history is read back. The port
works in conjunction with the HDS code in the on-chip
ROM and the hardware and software in a remote com-
puter. The HDS code must be linked to the user's appli-
cation code and reside in the first 4 Kwords of ROM.
The on-chip HDS cannot be used with the secure ROM
masking option (see Section 7.3, ROM Security Op-
tions).
Four hardware breakpoints can be set on instruction ad-
dresses. A counter can be preset with the number of
breakpoints to receive before trapping the core. Break-
points can be set in interrupt service routines. Alternate-
ly, the counter can be preset with the number of cache
instructions to execute before trapping the core.
Every time the program branches instead of executing
the next sequential instruction, the addresses of the in-
structions executed before and after the branch are
caught in circular memory. The memory contains the
last four pairs of program discontinuities for hardware
tracing.
In systems with multiple processors, the processors
may be configured so that any processor reaching a
breakpoint will cause all the other processors to be
trapped (see Section 4.3, Interrupts and Trap).
Pin Multiplexing
In order to allow flexible device interfacing while main-
taining a low package pin count, the DSP1629 multi-
plexes 16 package pins between BIO, PHIF, VEC[3:0],
and SIO2.
Upon reset, the vectored interrupt indication signals,
VEC[3:0], are connected to the package pins while
IOBIT[4:7] are disconnected. Setting bit 12, EBIOH, of
the ioc register connects IOBIT[4:7] to the package pins
and disconnects VEC[3:0].
Upon reset, the parallel host interface (PHIF) is con-
nected to the package pins while the second serial port
(SIO2) and IOBIT[3:0] are disconnected. Setting bit 10,
ESIO2, of the ioc register connects the SIO2 and
IOBIT[3:0] and disconnects the PHIF.
Power Management
Many applications require programmable sleep modes
for power management. There are three different con-
trol mechanisms for achieving low-power operation: the
powerc control register, the STOP pin, and the AWAIT
bit in the alf register. The AWAIT bit in the alf register al-
lows the processor to go into a power-saving standby
mode until an interrupt occurs. The powerc register con-
figures various power-saving modes by controlling inter-
nal clocks and peripheral I/O units. The STOP pin
controls the internal processor clock. The various power
management options may be chosen based on power
consumption and/or wake-up latency requirements.
4.2 DSP1600 Core Architectural Overview
Figure 5, DSP1600 Core Block Diagram, shows a block
diagram of the DSP1600 core.
System Cache and Control Section (SYS)
This section of the core contains a 15-word cache mem-
ory and controls the instruction sequencing. It handles
vectored interrupts and traps, and also provides decod-
ing for registers outside of the DSP1600 core. SYS
stretches the processor cycle if wait-states are required
(wait-states are programmable for external memory ac-
cesses). SYS sequences downloading via JTAG of self-
test programs to on-chip, dual-port RAM.
The cache loop iteration count can be specified at run
time under program control as well as at assembly time.
Data Sheet
DSP1629 Digital Signal Processor
January 2002
12
Agere Systems Inc.
4 Hardware Architecture
(continued)
Data Arithmetic Unit (DAU)
The data arithmetic unit (DAU) contains a 16 x 16-bit
parallel multiplier that generates a full 32-bit product in
one instruction cycle. The product can be accumulated
with one of two 36-bit accumulators. The accumulator
data can be directly loaded from, or stored to, memory
in two 16-bit words with optional saturation on overflow.
The arithmetic logic unit (ALU) supports a full set of
arithmetic and logical operations on either 16-bit or
32-bit data. A standard set of flags can be tested for
conditional ALU operations, branches, and subroutine
calls. This procedure allows the processor to perform as
a powerful 16-bit or 32-bit microprocessor for logical
and control applications. The available instruction set is
fully compatible with the DSP1627 instruction set. See
Section 5.1, Instruction Set, for more information on the
instruction set.
The user also has access to two additional DAU regis-
ters. The psw register contains status information from
the DAU (see Table 26, Processor Status Word (psw)
Register). The arithmetic control register, auc, is used to
configure some of the features of the DAU (see Table
27, Arithmetic Unit Control (auc) Register), including
single-cycle squaring. The auc register alignment field
supports an arithmetic shift left by one and left or right
by two. The auc register is cleared by reset.
The counters c0 to c2 are signed, 8 bits wide, and may
be used to count events such as the number of times
the program has executed a sequence of code. They
are controlled by the conditional instructions and pro-
vide a convenient method of program looping.
Y-Space Address Arithmetic Unit (YAAU)
The YAAU supports high-speed, register-indirect, com-
pound, and direct addressing of data (Y) memory. Four
general-purpose, 16-bit registers, r0 to r3, are available
in the YAAU. These registers can be used to supply the
read or write addresses for Y-space data. The YAAU
also decodes the 16-bit data memory address and out-
puts individual memory enables for the data access.
The YAAU can address the six 1 Kword banks of on-
chip DPRAM or three external data memory segments.
Up to 48 Kwords of off-chip RAM are addressable, with
16K addresses reserved for internal RAM.
Two 16-bit registers, rb and re, allow zero-overhead
modulo addressing of data for efficient filter implemen-
tations. Two 16-bit signed registers, j and k, are used to
hold user-defined postmodification increments. Fixed
increments of +1, 1, and +2 are also available. Four
compound-addressing modes are provided to make
read/write operations more efficient.
The YAAU allows direct (or indexed) addressing of data
memory. In direct addressing, the 16-bit base register
(ybase) supplies the 11 most significant bits of the ad-
dress. The direct data instruction supplies the remaining
5 bits to form an address to Y memory space and also
specifies one of 16 registers for the source or destina-
tion.
X-Space Address Arithmetic Unit (XAAU)
The XAAU supports high-speed, register-indirect, in-
struction/coefficient memory addressing with postmodi-
fication of the register. The 16-bit pt register is used for
addressing coefficients. The signed register i holds a
user-defined postincrement. A fixed postincrement of
+1 is also available. Register PC is the program
counter. Registers pr and pi hold the return address for
subroutine calls and interrupts, respectively.
The XAAU decodes the 16-bit instruction/coefficient ad-
dress and produces enable signals for the appropriate
X memory segment. The addressable X segments are
48 Kwords of internal ROM, up to 16 Kwords of DPRAM
for the DSP1629x16 or up to 10 Kwords of DPRAM for
the DSP1629x10, and external ROM.
The locations of these memory segments depend upon
the memory map selected (see Table 5, Instruction/Co-
efficient Memory Maps). A security mode can be select-
ed by mask option. This prevents unauthorized access
to the contents of on-chip ROM (see Section 7, Mask-
Programmable Options).
4.3 Interrupts and Trap
The DSP1629 supports prioritized, vectored interrupts
and a trap. The device has eight internal hardware
sources of program interrupt and two external interrupt
pins. Additionally, there is a trap pin and a trap signal
from the hardware development system (HDS). A soft-
ware interrupt is available through the icall instruction.
The icall instruction is reserved for use by the HDS.
Each of these sources of interrupt and trap has a unique
vector address and priority assigned to it.
The software interrupt and the traps are always enabled
and do not have a corresponding bit in the ins register.
Other vectored interrupts are enabled in the inc register
(see Table 29, Interrupt Control (inc) Register) and
monitored in the ins register (see Table 30, Interrupt
Status (ins) Register). When the DSP1629 goes into an
interrupt or trap service routine, the IACK pin is assert-
ed. In addition, pins VEC[3:0] encode which interrupt/
trap is being serviced. Table 4, Interrupt Vector Table,
details the encoding used for VEC[3:0].
Data Sheet
January 2002
DSP1629 Digital Signal Processor
Agere Systems Inc.
13
4 Hardware Architecture
(continued)
Figure 5. DSP1600 Core Block Diagram
psw (16)
auc (16)
CONTROL
CACHE
cloop (7)
inc (16)
ins (16)
alf (16)
mwait (16)
SYS
XDB
XAB
IDB
YAB
YDB
r0 (16)
r1 (16)
r2 (16)
r3 (16)
j (16)
k (16)
re (16)
YAAU
rb (16)
ADDER
MUX
CMP
ybase (16)
pc (16)
pt (16)
pi (16)
i (16)
ADDER
XAAU
EXTRACT/SAT
x (16)
yh (16)
yl (16)
16 x 16 MPY
p (32)
SHIFT (2, 0, 1, 2)
c0 (8)
c2 (8)
c1 (8)
16
ALU/SHIFT
a0 (36)
a1 (36)
36
32
MUX
DAU
MUX
1, 0, 1, 2
BRIDGE
MUX
1
pr (16)
5-1741 (F).b
Data Sheet
DSP1629 Digital Signal Processor
January 2002
14
Agere Systems Inc.
4 Hardware Architecture
(continued)
*
F3 ALU instructions with immediates require specifying the high half of the accumulators as a0h and a1h.
Table 3. DSP1600 Core Block Diagram Legend
Symbol
Name
16 x 16 MPY
16-bit x 16-bit Multiplier.
a0--a1
Accumulators 0 and 1 (16-bit halves specified as a0, a0l, a1, and a1l).*
alf
AWAIT, LOWPR, Flags.
ALU/SHIFT
Arithmetic Logic Unit/Shifter.
auc
Arithmetic Unit Control.
c0--c2
Counters 0--2.
cloop
Cache Loop Count.
CMP
Comparator.
DAU
Digital Arithmetic Unit.
i
Increment Register for the X Address Space.
IDB
Internal Data Bus.
inc
Interrupt Control.
ins
Interrupt Status.
j
Increment Register for the Y Address Space.
k
Increment Register for the Y Address Space.
MUX
Multiplexer.
mwait
External Memory Wait-states Register.
p
Product Register (16-bit halves specified as p, pl).
PC
Program Counter.
pi
Program Interrupt Return Register.
pr
Program Return Register.
psw
Processor Status Word.
pt
X Address Space Pointer.
r0--r3
Y Address Space Pointers.
rb
Modulo Addressing Register (begin address).
re
Modulo Addressing Register (end address).
SYS
System Cache and Control Section.
x
Multiplier Input Register.
XAAU
X-Space Address Arithmetic Unit.
XAB
X-Space Address Bus.
XDB
X-Space Data Bus.
YAAU
Y-Space Address Arithmetic Unit.
YAB
Y-Space Address Bus.
YDB
Y-Space Data Bus.
ybase
Direct Addressing Base Register.
y
DAU Register (16-bit halves specified as y, yl).
Data Sheet
January 2002
DSP1629 Digital Signal Processor
Agere Systems Inc.
15
4 Hardware Architecture
(continued)
Interruptibility
Vectored interrupts are serviced only after the execution
of an interruptible instruction. If more than one vectored
interrupt is asserted at the same time, the interrupts are
serviced sequentially according to their assigned priori-
ties. See Table 4, Interrupt Vector Table, for the priori-
ties assigned to the vectored interrupts. Interrupt
service routines, branch and conditional branch instruc-
tions, cache loops, and instructions that only decrement
one of the RAM pointers, r0 to r3 (e.g., *r3
-
-
-
- ----
), are not
interruptible.
A trap is similar to an interrupt, but it gains control of the
processor by branching to the trap service routine even
when the current instruction is noninterruptible. It may
not be possible to return to normal instruction execution
from the trap service routine since the machine state
cannot always be saved. In particular, program execu-
tion cannot be continued from a trapped cache loop or
interrupt service routine. While in a trap service routine,
another trap is ignored.
When set to 1, the status bits in the ins register indicate
that an interrupt has occurred. The processor must
reach an interruptible state (completion of an interrupt-
ible instruction) before an enabled vectored interrupt will
be acted on. An interrupt will not be serviced if it is not
enabled. Polled interrupt service can be implemented
by disabling the interrupt in the inc register and then
polling the ins register for the expected event.
Vectored Interrupts
Table 29, Interrupt Control (inc) Register, and Table 30,
Interrupt Status (ins) Register, show the inc and ins reg-
isters, respectively. A logic 1 written to any bit of inc en-
ables (or unmasks) the associated interrupt. If the bit is
cleared to a logic 0, the interrupt is masked. Note that
neither the software interrupt nor traps can be masked.
The occurrence of an interrupt that is not masked will
cause the program execution to transfer to the memory
location pointed to by that interrupt's vector address, as-
suming no other interrupt is being serviced (see Table
4, Interrupt Vector Table). The occurrence of an inter-
rupt that is masked causes no automatic processor ac-
tion, but will set the corresponding status bit in the ins
register. If a masked interrupt occurs, it is latched in the
ins register, but the interrupt is not taken. When un-
latched, this latched interrupt will initiate automatic pro-
cessor interrupt action. See the
DSP1611/17/18/27/28/
29 Digital Signal Processor
Information Manual for a
more detailed description of the interrupts.
Signaling Interrupt Service Status
Five pins of DSP1629 are devoted to signaling interrupt
service status. The IACK pin goes high while any inter-
rupt or user trap is being serviced, and goes low when
the ireturn instruction from the service routine is issued.
Four pins, VEC[3:0], carry a code indicating which of the
interrupts or trap is being serviced. Table 4, Interrupt
Vector Table, contains the encodings used by each in-
terrupt.
Traps due to HDS breakpoints have no effect on either
the IACK or VEC[3:0] pins. Instead, they show the inter-
rupt state or interrupt source of the DSP when the trap
occurred.
Clearing Interrupts
The PHIF interrupts (PIBF and POBE) are cleared by
reading or writing the parallel host interface data trans-
mit registers pdx0[in] and pdx0[out], respectively. The
SIO and SIO2 interrupts (IBF, IBF2, OBE, and OBE2)
are cleared one instruction cycle AFTER reading or writ-
ing the serial data registers, (sdx[in], sdx2[in], sdx[out],
or sdx2[out]). To account for this added latency, the
user must ensure that a single instruction (NOP or any
other valid DSP16XX instruction) follows the sdx regis-
ter read or write instruction prior to exiting an interrupt
service routine (via an ireturn or goto pi instruction) or
before checking the ins register for the SIO flag status.
Adding this instruction ensures that interrupts are not
reported incorrectly following an ireturn or that stale
flags are not read from the ins register. The JTAG inter-
rupt (JINT) is cleared by reading the jtag register.
Three of the vectored interrupts are cleared by writing to
the ins register. Writing a 1 to the INT0, INT1, or TIME
bits in the ins will cause the corresponding interrupt sta-
tus bit to be cleared to a logic 0. The status bit for these
vectored interrupts is also cleared when the ireturn in-
struction is executed, leaving set any other vectored in-
terrupts that are pending.
Traps
The TRAP pin of the DSP1629 is a bidirectional signal.
At reset, it is configured as an input to the processor.
Asserting the TRAP pin will force a user trap. The trap
mechanism is used for two purposes. It can be used by
an application to rapidly gain control of the processor for
asynchronous time-critical event handling (typically for
catastrophic error recovery). It is also used by the HDS
for breakpointing and gaining control of the processor.
Separate vectors are provided for the user trap (0x46)
and the HDS trap (0x3). Traps are not maskable.
Data Sheet
DSP1629 Digital Signal Processor
January 2002
16
Agere Systems Inc.
4 Hardware Architecture
(continued)
Table 4. Interrupt Vector Table
Source
Vector
Priority
VEC[3:0]
Issued by
No Interrupt
--
--
0x0
--
Software Interrupt
0x2
1
0x1
icall
INT0
0x1
2
0x2
pin
JINT
0x42
3
0x8
jtag in
INT1
0x4
4
0x9
pin
TIME
0x10
7
0xc
timer
IBF2
0x14
8
0xd
SIO2 in
OBE2
0x18
9
0xe
SIO2 out
Reserved
0x1c
10
0x0
--
Reserved
0x20
11
0x1
--
Reserved
0x24
12
0x2
--
IBF
0x2c
14
0x3
SIO in
OBE
0x30
15
0x4
SIO out
PIBF
0x34
16
0x5
PHIF in
POBE
0x38
17
0x6
PHIF out
TRAP from HDS
0x3
18
--
*
* Traps due to HDS breakpoints have no effect on VEC[3:0] pins.
breakpoint, jtag, or pin
TRAP from User
0x46
19 = highest
0x7
pin
A trap has four cycles of latency. At most, two instruc-
tions will execute from the time the trap is received at
the pin to when it gains control. An instruction that is ex-
ecuting when a trap occurs is allowed to complete be-
fore the trap service routine is entered. (Note that the
instruction could be lengthened by wait-states.) During
normal program execution, the pi register contains ei-
ther the address of the next instruction (two-cycle in-
struction executing), or the address following the next
instruction (one-cycle instruction executing). In an inter-
rupt service routine, pi contains the interrupt return ad-
dress. When a trap occurs during an interrupt service
routine, the value of the pi register may be overwritten.
Specifically, it is not possible to return to an interrupt
service routine from a user trap (0x46) service routine.
Continuing program execution when a trap occurs dur-
ing a cache loop is also not possible.
The HDS trap causes circuitry to force the program
memory map to MAP1 (with on-chip ROM starting at ad-
dress 0x0) when the trap is taken. The previous memo-
ry map is restored when the trap service routine exits by
issuing an ireturn. The map is forced to MAP1 because
the HDS code, if present, resides in the on-chip ROM.
Using the Agere Systems development tools, the TRAP
pin may be configured to be an output, or an input vec-
toring to address 0x3. In a multiprocessor environment,
the TRAP pins of all the DSPs present can be tied to-
gether. During HDS operations, one DSP is selected by
the host software to be the master. The master proces-
sor's TRAP pin is configured to be an output.
The TRAP pins of the slave processors are configured
as inputs. When the master processor reaches a break-
point, the master's TRAP pin is asserted. The slave pro-
cessors will respond to their TRAP input by beginning to
execute the HDS code.
AWAIT Interrupt (Standby or Sleep Mode)
Setting the AWAIT bit (bit 15) of the alf register (alf =
0x8000) causes the processor to go into a power-saving
standby or sleep mode. Only the minimum circuitry on
the chip required to process an incoming interrupt re-
mains active. After the AWAIT bit is set, one additional
instruction will be executed before the standby power-
saving mode is entered. A PHIF or SIO word transfer
will complete if already in progress. The AWAIT bit is re-
set when the first interrupt occurs. The chip then wakes
up and continues executing.
Two nop instructions should be programmed after the
AWAIT bit is set. The first nop (one cycle) will be exe-
cuted before sleeping; the second will be executed after
the interrupt signal awakens the DSP and before the in-
terrupt service routine is executed.
Data Sheet
January 2002
DSP1629 Digital Signal Processor
Agere Systems Inc.
17
4 Hardware Architecture
(continued)
The AWAIT bit should be set from within the cache if the
code which is executing resides in external ROM where
more than one wait-state has been programmed. This
ensures that an interrupt will not disturb the device from
completely entering the sleep state.
For additional power savings, set ioc = 0x0180 and tim-
erc = 0x0040, in addition to setting alf = 0x8000. This
will hold the CKO pin low and shut down the timer and
prescaler (see Table 38, ioc Register, and Table 31,
timerc Register).
For a description of the control mechanisms for putting
the DSP into low-power modes, see Section 4.13, Pow-
er Management.
4.4 Memory Maps and Wait-States
The DSP1600 core implements a modified Harvard ar-
chitecture that has separate on-chip 16-bit address and
data buses for the instruction/coefficient (X) and data
(Y) memory spaces. Table 5, Instruction/Coefficient
Memory Maps, shows the instruction/coefficient memo-
ry space maps for both the DSP1629x16 and
DSP1629x10.
The DSP1629 provides a multiplexed external bus
which accesses external RAM (ERAM) and ROM
(EROM). Programmable wait-states are provided for
external memory accesses. The instruction/coefficient
memory map is configurable to provide application flex-
ibility. Table 6, Data Memory Maps, shows the data
memory space, which has one map.
Instruction/Coefficient Memory Map Selection
In determining which memory map to use, the proces-
sor evaluates the state of two parameters. The first is
the LOWPR bit (bit 14) of the alf register. The LOWPR
bit of the alf register is initialized to 0 automatically at re-
set. LOWPR controls the starting address in memory
assigned to 1K banks of dual-port RAM. If LOWPR is
low, internal dual-port RAM begins at address 0xC000.
If LOWPR is high, internal dual-port RAM begins at ad-
dress 0x0. LOWPR also moves IROM from 0x0 in
MAP1 to 0x4000 in MAP3, and EROM from 0x0 in
MAP2 to 0x4000 in MAP4.
The second parameter is the value of the EXM pin at re-
set (pin 27 or pin 14, depending upon the package
type). EXM determines whether the internal 48 Kwords
ROM (IROM) will be addressable in the memory map.
The Agere Systems development system tools, togeth-
er with the on-chip HDS circuitry and the JTAG port, can
independently set the memory map. Specifically, during
an HDS trap, the memory map is forced to MAP1. The
user's map selection is restored when the trap service
routine has completed execution.
MAP1
MAP1 has the IROM starting at 0x0 and 1 Kword banks
of DPRAM starting at 0xC000. MAP1 is used if
DSP1629 has EXM low at reset and the LOWPR pa-
rameter is programmed to zero. It is also used during an
HDS trap.
MAP2
MAP2 differs from MAP1 in that the lowest 48 Kwords
reference external ROM (EROM). MAP2 is used if EXM
is high at reset, the LOWPR parameter is programmed
to zero, and an HDS trap is not in progress.
MAP3
MAP3 has the 1 Kword banks of DPRAM, starting at
address 0x0. In MAP3, the 48 Kwords of IROM start at
0x4000. MAP3 is used if EXM is low at reset, the LOW-
PR bit is programmed to 1, and an HDS trap is not in
progress. Note that this map is not available if the se-
cure mask-programmable option has been ordered.
MAP4
MAP4 differs from MAP3 in that addresses above
0x4000 reference external ROM (EROM). This map is
used if the LOWPR bit is programmed to 1, an HDS trap
is not in progress, and, either EXM is high during reset,
or the secure mask-programmable option has been or-
dered.
Whenever the chip is reset using the RSTB pin, the de-
fault memory map will be MAP1 or MAP2, depending
upon the state of the EXM pin at reset. A reset through
the HDS will not reinitialize the alf register, so the previ-
ous memory map is retained.
Boot from External ROM
After RSTB goes from low to high, the DSP1629 comes
out of reset and fetches an instruction from address
zero of the instruction/coefficient space. The physical
location of address zero is determined by the memory
map in effect. If EXM is high at the rising edge of RSTB,
MAP2 is selected. MAP2 has EROM at location zero;
thus, program execution begins from external memory.
If EXM is high and INT1 is low when RSTB rises, the
mwait register defaults to 15 wait-states for all external
memory segments. If INT1 is high, the mwait register
defaults to 0 wait-states.
Data Sheet
DSP1629 Digital Signal Processor
January 2002
18
Agere Systems Inc.
4 Hardware Architecture
(continued)
Table 5. Instruction/Coefficient Memory Maps
* MAP1 is set automatically during an HDS trap. The user-selected map is restored at the end of the HDS trap service routine.
LOWPR is an alf register bit. The Agere Systems development system tools can independently set the memory map.
MAP3 is not available if the secure mask-programmable option is selected.
DSP1629x16
X Address
AB[0:15]
MAP 1*
EXM = 0
LOWPR = 0
MAP 2
EXM = 1
LOWPR = 0
MAP 3
EXM = 0
LOWPR = 1
MAP 4
EXM = 1
LOWPR = 1
0
0x0000
IROM
(48K)
EROM
(48K)
DPRAM
(16K)
DPRAM
(16K)
4K
0x1000
6K
0x1800
12K
0x3000
16K
0x4000
IROM
(48K)
EROM
(48K)
20K
0x5000
24K
0x6000
28K
0x7000
32K
0x8000
36K
0x9000
40K
0xA000
44K
0xB000
48K
0xC000
DPRAM
(16K)
DPRAM
(16K)
52K
0xD000
54K
0xD800
56K
0xE000
60K--64K
0xFFFF
DSP1629x10
X Address
AB[0:15]
MAP 1*
EXM = 0
LOWPR = 0
MAP 2
EXM = 1
LOWPR = 0
MAP 3
EXM = 0
LOWPR = 1
MAP 4
EXM = 1
LOWPR = 1
0
0x0000
IROM
(48K)
EROM
(48K)
DPRAM
(10K)
DPRAM
(10K)
4K
0x1000
6K
0x1800
10K
0x2800
Reserved
(6K)
Reserved
(6K)
12K
0x3000
16K
0x4000
IROM
(48K)
EROM
(48K)
20K
0x5000
24K
0x6000
28K
0x7000
32K
0x8000
36K
0x9000
40K
0xA000
44K
0xB000
48K
0xC000
DPRAM
(10K)
DPRAM
(10K)
52K
0xD000
54K
0xD800
56K
0xE000
58K
0xE800
Reserved
(6K)
Reserved
(6K)
60K--64K
0xFFFF
Data Sheet
January 2002
DSP1629 Digital Signal Processor
Agere Systems Inc.
19
4 Hardware Architecture
(continued)
Table 6. Data Memory Maps
On the data memory side (see Table 6, Data Memory
Maps), the 1K banks of dual-port RAM are located start-
ing at address 0. Addresses from 0x4000 to 0x40FF ref-
erence a 256-word memory-mapped I/O segment (IO).
Addresses from 0x4100 to 0x7FFF reference the low
external data RAM segment (ERAMLO). Addresses
above 0x8000 reference high external data RAM (ER-
AMHI).
Wait-States
The number of wait-states (from 0 to 15) used when ac-
cessing each of the four external memory segments
(ERAMLO, IO, ERAMHI, and EROM) is programmable
in the mwait register (see Table 36, mwait Register).
When the program references memory in one of the
four external segments, the internal multiplexer is auto-
matically switched to the appropriate set of internal bus-
es, and the associated external enable of ERAMLO, IO,
ERAMHI, or EROM is issued. The external memory cy-
cle is automatically stretched by the number of wait-
states configured in the appropriate field of the mwait
register.
1629x16 Data Memory Map (Not to Scale)
Decimal
Address
Address in
r0, r1, r2, r3
Segment
0
0x0000
DPRAM[1:16]
16K
0x4000
IO
16,640
0x4100
ERAMLO
32K
0x8000
ERAMHI
64K 1
0xFFFF
1629x10 Data Memory Map (Not to Scale)
Decimal
Address
Address in
r0, r1, r2, r3
Segment
0
0x0000
DPRAM[1:10]
10K
0x2800
Reserved
(6 K)
16K
0x4000
IO
16,640
0x4100
ERAMLO
32K
0x8000
ERAMHI
64K 1
0xFFFF
Data Sheet
DSP1629 Digital Signal Processor
January 2002
20
Agere Systems Inc.
4 Hardware Architecture
(continued)
4.5 External Memory Interface (EMI)
The external memory interface supports read/write op-
erations from instruction/coefficient memory, data
memory, and memory-mapped I/O devices. The
DSP1629 provides a 16-bit external address bus,
AB[15:0], and a 16-bit external data bus, DB[15:0].
These buses are multiplexed between the internal bus-
es for the instruction/coefficient memory and the data
memory. Four external memory segment enables,
ERAMLO, IO, ERAMHI, and EROM, select the external
memory segment to be addressed.
If a data memory location with an address between
0x4100 and 0x7FFF is addressed, ERAMLO is asserted
low.
If one of the 256 external data memory locations, with
an address greater than or equal to 0x4000, and less
than or equal to 0x40FF, is addressed, IO is asserted
low. IO is intended for memory-mapped I/O.
If a data memory location with an address greater than
or equal to 0x8000 is addressed, ERAMHI is asserted
low. When the external instruction/coefficient memory is
addressed, EROM is asserted low.
The flexibility provided by the programmable options of
the external memory interface (see Table 36, mwait
Register, and Table 38, ioc Register) allows the
DSP1629 to interface gluelessly with a variety of com-
mercial memory chips.
Each of the four external memory segments, ERAMLO,
IO, ERAMHI, and EROM, has a number of wait-states
that is programmable (from 0 to 15) by writing to the
mwait register. When the program references memory
in one of the four external segments, the internal multi-
plexer is automatically switched to the appropriate set of
internal buses, and the associated external enable of
ERAMLO, IO, ERAMHI, or EROM is issued. The exter-
nal memory cycle is automatically stretched by the num-
ber of wait-states in the appropriate field of the mwait
register.
When writing to external memory, the RWN pin goes
low for the external cycle. The external data bus,
DB[15:0], is driven by the DSP1629, starting halfway
through the cycle. The data driven on the external data
bus is automatically held after the cycle for one addi-
tional clock period unless an external read cycle imme-
diately follows.
The DSP1629 has one external address bus and one
external data bus for both memory spaces. Since some
instructions provide the capability of simultaneous ac-
cess to both X space and Y space, some provision must
be made to avoid collisions for external accesses. The
DSP1629 has a sequencer that does the external X ac-
cess first, and then the external Y access, transparently
to the programmer. Wait-states are maintained as pro-
grammed in the mwait register. For example, let two in-
structions be executed: the first reads a coefficient from
EROM and writes data to ERAM; the second reads a
coefficient from EROM and reads data from ERAM. The
sequencer carries out the following steps at the external
memory interface: read EROM, write ERAM, read ER-
OM, and read ERAM. Each step is done in sequential
one-instruction cycle steps, assuming zero wait-states
are programmed. Note that the number of instruction
cycles taken by the two instructions is four. Also, in this
case, the write hold time is zero.
The DSP1629 allows writing into external instruction/
coefficient memory. By setting bit 11, WEROM, of the
ioc register (see Table 38, ioc Register), writing to (or
reading from) data memory or memory-mapped I/O as-
serts the EROM strobe instead of ERAMLO, IO, or ER-
AMHI. Therefore, with WEROM set, EROM appears in
both Y space (replacing ERAM) and X space, in its nor-
mal position.
Bit 14 of the ioc register (see Table 38, ioc Register),
EXTROM, may be used with WEROM to download to a
full 64K of external memory. When WEROM and EX-
TROM are both asserted, address bit 15 (AB15) is held
low, aliasing the upper 32K of external memory into the
lower 32K.
When an access to internal memory is made, the
AB[15:0] bus holds the last valid external memory ad-
dress. Asserting the RSTB pin low 3-states the AB[15:0]
bus. After reset, the AB[15:0] value is undefined.
The leading edge of the memory segment enables can
be delayed by approximately one-half a CKO period by
programming the ioc register (see Table 38, ioc Regis-
ter). This is used to avoid a situation in which two devic-
es drive the data bus simultaneously.
Bits 7, 8, and 13 of the ioc register select the mode of
operation for the CKO pin (see Table 38, ioc Register).
Available options are a free-running unstretched clock,
a wait-stated sequenced clock (runs through two com-
plete cycles during a sequenced external memory ac-
cess), and a wait-stated clock based on the internal
instruction cycle. These clocks drop to the low-speed in-
ternal ring oscillator when SLOWCKI is enabled (see
Section 4.13, Power Management). The high-to-low
transitions of the wait-stated clock are synchronized to
the high-to-low transition of the free-running clock. Also,
the CKO pin provides either a continuously high level, a
continuously low level, or changes at the rate of the in-
ternal processor clock. This last option, only available
with the small-signal input clock options, enables the
DSP1629 CKI input buffer to deliver a full-rate clock to
other devices while the DSP1629 itself is in one of the
low-power modes.
Data Sheet
January 2002
DSP1629 Digital Signal Processor
Agere Systems Inc.
21
4 Hardware Architecture
(continued)
4.6 Bit Manipulation Unit (BMU)
The BMU interfaces directly to the main accumulators in
the DAU, providing the following features:
s
Barrel shifting--logical and arithmetic, left and right
shift
s
Normalization and extraction of exponent
s
Bit-field extraction and insertion
These features increase the efficiency of the DSP in ap-
plications such as control or data encoding and decod-
ing. For example, data packing and unpacking, in which
short data words are packed into one 16-bit word for
more efficient memory storage, is very easy.
In addition, the BMU provides two auxiliary accumula-
tors, aa0 and aa1. In one instruction cycle, 36-bit data
can be shuffled, or swapped, between one of the main
accumulators and one of the alternate accumulators.
The ar<0--3> registers are 16-bit registers that control
the operations of the BMU. They store a value that de-
termines the amount of shift or the width and offset fields
for bit extraction or insertion. Certain operations in the
BMU set flags in the DAU psw register and the alf regis-
ter (see Table 26, Processor Status Word (psw) Regis-
ter, and Table 35, alf Register). The ar<0--3> registers
can also be used as general-purpose registers.
The BMU instructions are detailed in Section 5.1, In-
struction Set. For a thorough description of the BMU,
see the
DSP1611/17/18/27/28/29 Digital Signal Proces-
sor
Information Manual.
4.7 Serial I/O Units (SIOs)
The serial I/O ports on the DSP1629 device provide a
serial interface to many codecs and signal processors
with little, if any, external hardware required. Each high-
speed, double-buffered port (sdx and sdx2) supports
back-to-back transmissions of data. SIO and SIO2 are
identical. The output buffer empty (OBE and OBE2) and
input buffer full (IBF and IBF2) flags facilitate the reading
and/or writing of each serial I/O port by program-driven
or interrupt-driven I/O. There are four selectable active
clock speeds.
A bit-reversal mode provides compatibility with either the
most significant bit (MSB) first or least significant bit
(LSB) first serial I/O formats (see Table 22, Serial I/O
Control Registers). A multiprocessor I/O configuration is
supported. This feature allows up to eight DSP161X de-
vices to be connected together on an SIO port without
requiring external glue logic.
The serial data may be internally looped back by setting
the SIO loopback control bit, SIOLBC, of the ioc register.
SIOLBC affects both the SIO and SIO2. The data output
signals are wrapped around internally from the output to
the input (DO1 to DI1 and DO2 to DI2). To exercise loop-
back, the SIO clocks (ICK1, ICK2, OCK1, and OCK2)
should either all be in the active mode,
16-bit condition, or each pair should be driven from one
external source in passive mode. Similarly, pins ILD1
(ILD2) and OLD1 (OLD2) must both be in active mode or
tied together and driven from one external frame clock in
passive mode. During loopback, DO1, DO2, DI1, DI2,
ICK1, ICK2, OCK1, OCK2, ILD1, ILD2, OLD1, OLD2,
SADD1, SADD2, SYNC1, SYNC2, DOEN1, and DOEN2
are 3-stated.
Setting DODLY = 1 (sioc and sioc2) delays DO by one
phase of OCK so that DO changes on the falling edge of
OCK instead of the rising edge (DODLY = 0). This reduc-
es the time available for DO to drive DI and to be valid
for the rising edge of ICK, but increases the hold time on
DO by half a cycle on OCK.
Programmable Modes
Programmable modes of operation for the SIO and SIO2
are controlled by the serial I/O control registers (sioc and
sioc2). These registers, shown in Table 22, Serial I/O
Control Registers, are used to set the ports into various
configurations. Both input and output operations can be
independently configured as either active or passive.
When active, the DSP1629 generates load and clock
signals. When passive, load and clock signal pins are in-
puts.
Since input and output can be independently configured,
each SIO has four different modes of operation. Each of
the sioc registers is also used to select the frequency of
active clocks for that SIO. Finally, these registers are
used to configure the serial I/O data formats. The data
can be 8 bits or 16 bits long, and can also be input/output
MSB first or LSB first. Input and output data formats can
be independently configured.
Multiprocessor Mode
The multiprocessor mode allows up to eight devices that
support multiprocessor mode (codecs or DSP16XX de-
vices) to be connected together to provide data trans-
mission among any of the multiprocessor devices in the
system. Either of the DSP1629's SIO ports (SIO or
SIO2) may be independently used for the multiprocessor
mode. The multiprocessor interface is a four-wire inter-
face, consisting of a data channel, an address/protocol
channel, a transmit/receive clock, and a sync signal (see
Figure 6, Multiprocessor Communication and Connec-
tions). The DI1 and DO1 pins of all the DSPs are con-
nected to transmit and receive the data channel. The
SADD1 pins of all the DSPs are connected to transmit
and receive the address/protocol channel. ICK1 and
OCK1 should be tied together and driven from one
source. The SYNC1 pins of all the DSPs are connected.
Data Sheet
DSP1629 Digital Signal Processor
January 2002
22
Agere Systems Inc.
4 Hardware Architecture
(continued)
In the configuration shown in Figure 6, Multiprocessor
Communication and Connections, the master DSP
(DSP0) generates active SYNC1 and OCK1 signals
while the slave DSPs use the SYNC1 and OCK1 signals
in passive mode to synchronize operations. In addition,
all DSPs must have their ILD1 and OLD1 signals in ac-
tive mode.
While ILD1 and OLD1 are not required externally for
multiprocessor operation, they are used internally in the
DSP's SIO. Setting the LD field of the master's sioc reg-
ister to a logic level 1 will ensure that the active genera-
tion of SYNC1, ILD1, and OLD1 is derived from OCK1
(see Table 22, Serial I/O Control Registers). With this
configuration, all DSPs should use ICK1 (tied to OCK1)
in passive mode to avoid conflicts on the clock (CK) line
(see the
DSP1611/17/18/27/28/29 Digital Signal Pro-
cessor
Information Manual for more information).
Four registers (per SIO) configure the multiprocessor
mode: the time-division multiplexed slot register (tdms
or tdms2), the serial receive and transmit address reg-
ister (srta or srta2), the serial data transmit register (sdx
or sdx2), and the multiprocessor serial address/protocol
register (saddx or saddx2).
Multiprocessor mode requires no external logic and
uses a TDM interface with eight 16-bit time slots per
frame. The transmission in any time slot consists of
16 bits of serial data in the data channel and 16 bits of
address and protocol information in the address/proto-
col channel. The address information consists of the
transmit address field of the srta register of the transmit-
ting device. The address information is transmitted con-
currently with the transmission of the first 8 bits of data.
The protocol information consists of the transmit proto-
col field written to the saddx register and is transmitted
concurrently with the last 8 bits of data (see Table 25,
Multiprocessor Protocol Registers). Data is received or
recognized by other DSP(s) whose receive address
matches the address in the address/protocol channel.
Each SIO port has a user-programmable receive ad-
dress and transmit address associated with it. The
transmit and receive addresses are programmed in the
srta register.
In multiprocessor mode, each device can send data in
a unique time slot designated by the tdms register trans-
mit slot field (bits 7--0). The tdms register has a fully de-
coded transmit slot field in order to allow one DSP1629
device to transmit in more than one time slot. This pro-
cedure is useful for multiprocessor systems with less
than eight DSP1629 devices when a higher bandwidth
is necessary between certain devices in that system.
The DSP operating during time slot 0 also drives
SYNC1.
In order to prevent multiple bus drivers, only one DSP
can be programmed to transmit in a particular time slot.
In addition, it is important to note that the address/pro-
tocol channel is 3-stated in any time slot that is not being
driven.
Therefore, to prevent spurious inputs, the address/pro-
tocol channel should be pulled up to V
DD
with a 5 k
re-
sistor, or it should be guaranteed that the bus is driven
in every time slot. (If the SYNC1 signal is externally gen-
erated, then this pull-up is required for correct initializa-
tion.)
Each SIO also has a fully decoded transmitting address
specified by the srta register transmit address field (bits
7--0). This is used to transmit information regarding the
destination(s) of the data. The fully decoded receive ad-
dress specified by the srta register receive address field
(bits 15--8) determines which data will be received.
The SIO protocol channel data is controlled via the sad-
dx register. When the saddx register is written, the lower
8 bits contain the 8-bit protocol field. On a read, the
high-order 8 bits read from saddx are the most recently
received protocol field sent from the transmitting DSP's
saddx output register. The low-order 8 bits are read as
0s.
An example use of the protocol channel is to use the top
3 bits of the saddx value as an encoded source address
for the DSPs on the multiprocessor bus. This leaves the
remaining 5 bits available to convey additional control
information, such as whether the associated field is an
opcode or data, or whether it is the last word in a trans-
fer, etc. These bits can also be used to transfer parity in-
formation about the data. Alternatively, the entire field
can be used for data transmission, boosting the band-
width of the port by 50%.
Using SIO2
The SIO2 functions the same as the SIO. Please refer
to the Pin Multiplexing section for a description of pin
multiplexing of BIO, PHIF, VEC[3:0], and SIO2.
Data Sheet
January 2002
DSP1629 Digital Signal Processor
Agere Systems Inc.
23
4 Hardware Architecture
(continued)
Figure 6. Multiprocessor Communication and Connections
DSP 0
DO
ICK
SA
D
D
SY
N
C
DSP 1
DSP 7
DATA CHANNEL
CLOCK
ADDRESS/PROTOCOL CHANNEL
SYNC SIGNAL
DI
OCK
DO
ICK
SA
D
D
SY
N
C
DI
OCK
DO
IC
K
SA
DD
SY
NC
DI
OCK
5 k
V
DD
5-4181 (F).a
4.8 Parallel Host Interface (PHIF)
The DSP1629 has an 8-bit parallel host interface for
rapid transfer of data with external devices. This parallel
port is passive (data strobes provided by an external de-
vice) and supports either
Motorola
or
Intel
microcontrol-
ler protocols. The PHIF also provides for 8-bit or
16-bit data transfers. As a flexible host interface, it re-
quires little or no glue logic to interface to other devices
(e.g., microcontrollers, microprocessors, or another
DSP).
The data path of the PHIF consists of a 16-bit input buff-
er, pdx0(in), and a 16-bit output buffer, pdx0(out). Two
output pins, parallel input buffer full (PIBF) and parallel
output buffer empty (POBE), indicate the state of the
buffers. In addition, there are two registers used to con-
trol and monitor the PHIF's operation: the parallel host
interface control register (phifc, see Table 28, Parallel
Host Interface Control (phifc) Register), and the PHIF
status register (PSTAT, see Table 8, pstat Register as
Seen on PB[7:0]). The PSTAT register, which reflects
the state of the PIBF and POBE flags, can only be read
by an external device when the PSTAT input pin is as-
serted. The phifc register defines the programmable op-
tions for this port.
The function of the pins, PIDS and PODS, is program-
mable to support both the
Intel
and
Motorola
protocols.
The pin, PCSN, is an input that, when low, enables
PIDS and PODS (or PRWN and PDS, depending on the
protocol used). While PCSN is high, the DSP1629 ig-
nores any activity on PIDS and/or PODS. If a DSP1629
is intended to be continuously accessed through the
PHIF port, PCSN should be grounded. If PCSN is low
and the respective bits in the inc register are set, the as-
sertion of PIDS and PODS by an external device caus-
es the DSP1629 device to recognize an interrupt.
Programmability
The parallel host interface can be programmed for 8-bit
or 16-bit data transfers using bit 0, PMODE, of the phifc
register. Setting PMODE selects 16-bit transfer mode.
An input pin controlled by the host, PBSEL, determines
an access of either the high or low bytes. The assertion
level of the PBSEL input pin is configurable in software
using bit 3 of the phifc register, PBSELF. Table 7, PHIF
Function (8-bit and 16-bit Modes), summarizes the
port's functionality as controlled by the PSTAT and PB-
SEL pins and the PBSELF and PMODE fields.
For 16-bit transfers, if PBSELF is zero, the PIBF and
POBE flags are set after the high byte is transferred. If
PBSELF is one, the flags are set after the low byte is
transferred. In 8-bit mode, only the low byte is access-
ed, and every completion of an input or output access
sets PIBF or POBE.
Bit 1 of the phifc register, PSTROBE, configures the
port to operate either with an
Intel
protocol, where only
the chip select (PCSN) and either of the data strobes
(PIDS or PODS) are needed to make an access, or with
a
Motorola
protocol, where the chip select (PCSN), a
data strobe (PDS), and a read/write strobe (PRWN) are
needed. PIDS and PODS are negative assertion data
strobes while the assertion level of PDS is programma-
ble through bit 2, PSTRB, of the phifc register.
Data Sheet
DSP1629 Digital Signal Processor
January 2002
24
Agere Systems Inc.
4 Hardware Architecture
(continued)
Finally, the assertion level of the output pins, PIBF and POBE, is controlled through bit 4, PFLAG. When PFLAG is
set low, PIBF and POBE output pins have positive assertion levels. By setting bit 5, PFLAGSEL, the logical OR of
PIBF and POBE flags (positive assertion) is seen at the output pin PIBF. By setting bit 7 in phifc, PSOBEF, the po-
larity of the POBE flag in the status register, PSTAT, can be changed. PSOBEF has no effect on the POBE pin.
Pin Multiplexing
Please refer to the Pin Multiplexing section for a description of BIO, PHIF, VEC[3:0], and SIO2 pins.
Table 7. PHIF Function (8-bit and 16-bit Modes)
PMODE Field
PSTAT Pin
PBSEL Pin
PBSELF Field = 0
PBSELF Field = 1
0 (8-bit)
0
0
pdx0 low byte
reserved
0
0
1
reserved
pdx0 low byte
0
1
0
PSTAT
reserved
0
1
1
reserved
PSTAT
1 (16-bit)
0
0
pdx0 low byte
pdx0 high byte
1
0
1
pdx0 high byte
pdx0 low byte
1
1
0
PSTAT
reserved
1
1
1
reserved
PSTAT
Table 8. pstat Register as Seen on PB[7:0]
Bit
7
6
5
4
3
2
1
0
Field
RSVD
PIBF
POBE
4.9 Bit Input/Output Unit (BIO)
The BIO controls the directions of eight bidirectional
control I/O pins, IOBIT[7:0]. If a pin is configured as an
output, it can be individually set, cleared, or toggled. If a
pin is configured as an input, it can be read and/or test-
ed.
The lower half of the sbit register (see Table 33, sbit
Register) contains current values (VALUE[7:0]) of the
eight bidirectional pins IOBIT[7:0]. The upper half of the
sbit register (DIREC[7:0]) controls the direction of each
of the pins. A logic 1 configures the corresponding pin as
an output; a logic 0 configures it as an input. The upper
half of the sbit register is cleared upon reset.
The cbit register (see Table 34, cbit Register) contains
two 8-bit fields: MODE/MASK[7:0] and DATA/PAT[7:0].
The values of DATA/PAT[7:0] are cleared upon reset.
The meaning of a bit in either field depends on whether
it has been configured as an input or an output in sbit. If
a pin has been configured to be an output, the meanings
are MODE and DATA. For an input, the meanings are
MASK and PAT (pattern). Table 9, BIO Operations,
shows the functionality of the MODE/MASK and DATA/
PAT bits based on the direction selected for the associ-
ated IOBIT pin.
Those bits that have been configured as inputs can be
individually tested for 1 or 0. For those inputs that are
being tested, there are four flags produced: allt (all true),
allf (all false), somet (some true), and somef (some
false). These flags can be used for conditional branch or
special instructions. The state of these flags can be
saved and restored by reading and writing bits 0 to 3 of
the alf register (see Table 35, alf Register).
If a BIO pin is switched from being configured as an out-
put to being configured as an input and then back to be-
ing configured as an output, the pin retains the previous
output value.
Pin Multiplexing
Please refer to the Pin Multiplexing section for a descrip-
tion of BIO, PHIF, VEC[3:0], and SIO2 pins.
Table 9. BIO Operations
DIREC[n]
*
* 0
n
7.
MODE/
MASK[n]
DATA/
PAT[n]
Action
1 (Output)
0
0
Clear
1 (Output)
0
1
Set
1 (Output)
1
0
No Change
1 (Output)
1
1
Toggle
0 (Input)
0
0
No Test
0 (Input)
0
1
No Test
0 (Input)
1
0
Test for Zero
0 (Input)
1
1
Test for One
Data Sheet
January 2002
DSP1629 Digital Signal Processor
Agere Systems Inc.
25
4 Hardware Architecture
(continued)
4.10 Timer
The interrupt timer is composed of the timerc (control)
register, the timer0 register, the prescaler, and the
counter itself. The timer control register (see Table 31,
timerc Register) sets up the operational state of the tim-
er and prescaler. The timer0 register is used to hold the
counter reload value (or period register) and to set the
initial value of the counter. The prescaler slows the
clock to the timer by a number of binary divisors to allow
for a wide range of interrupt delay periods.
The counter is a 16-bit down counter that can be loaded
with an arbitrary number from software. It counts down
to 0 at the clock rate provided by the prescaler. Upon
reaching 0 count, a vectored interrupt to program ad-
dress 0x10 is issued to the DSP1629, providing the in-
terrupt is enabled (bit 8 of inc and ins registers). The
counter will then either wait in an inactive state for an-
other command from software, or will automatically re-
peat the last interrupting period, depending upon the
state of the RELOAD bit in the timerc register.
When RELOAD is 0, the counter counts down from its
initial value to 0, interrupts the DSP1629, and then
stops, remaining inactive until another value is written to
the timer0 register. Writing to the timer0 register causes
both the counter and the period register to be written
with the specified 16-bit number. When RELOAD is 1,
the counter counts down from its initial value to 0, inter-
rupts the DSP1629, automatically reloads the specified
initial value from the period register into the counter,
and repeats indefinitely. This provides for either a single
timed interrupt event or a regular interrupt clock of arbi-
trary period.
The timer can be stopped and started by software, and
can be reloaded with a new period at any time. Its count
value, at the time of the read, can also be read by soft-
ware. Due to pipeline stages, stopping and starting the
timer may result in one inaccurate count or prescaled
period. When the DSP1629 is reset, the bottom 6 bits of
the timerc register and the timer0 register and counter
are initialized to 0. This sets the prescaler to CKO/2*,
turns off the reload feature, disables timer counting, and
initializes the timer to its inactive state. The act of reset-
ting the chip does not cause a timer interrupt. Note that
the period register is not initialized on reset.
The T0EN bit of the timerc register enables the clock to
the timer. When T0EN is a 1, the timer counts down to-
wards 0. When T0EN is a 0, the timer holds its current
count.
*
Frequency of CKO/2 is equivalent to either CKI/2 for the PLL by-
passed or related to CKI by the PLL multiplying factors. See Sec-
tion 4.12, Clock Synthesis.
The PRESCALE field of the timerc register selects one
of 16 possible clock rates for the timer input clock (see
Table 31, timerc Register).
Setting the DISABLE bit of the timerc register to a logic
1 shuts down the timer and the prescaler for power sav-
ings. Setting the TIMERDIS, bit 4, in the powerc register
has the same effect of shutting down the timer. The
DISABLE bit and the TIMERDIS bit are cleared by writ-
ing a 0 to their respective registers to restore the normal
operating mode.
4.11 JTAG Test Port
The DSP1629 uses a JTAG/
IEEE
1149.1 standard five-
wire test port (TDI, TDO, TCK, TMS, TRST) for self-test
and hardware emulation. An instruction register, a
boundary-scan register, a bypass register, and a device
identification register have been implemented. The de-
vice identification register coding for the DSP1629 is
shown in Table 37, DSP1629 32-Bit JTAG ID Register.
The instruction register (IR) is 4 bits long. The instruc-
tion for accessing the device ID is 0xE (1110). The be-
havior of the instruction register is summarized in Table
10, JTAG Instruction Register. Cell 0 is the LSB (closest
to TDO).
The first line shows the cells in the IR that capture from
a parallel input in the capture-IR controller state. The
second line shows the cells that always load a logic 1 in
the capture-IR controller state. The third line shows the
cells that always load a logic 0 in the capture-IR control-
ler state. Cell 3 (MSB of IR) is tied to status signal PINT,
and cell 2 is tied to status signal JINT. The state of these
signals can therefore be captured during capture-IR and
shifted out during SHIFT-IR controller states.
Boundary-Scan Register
All of the chip's inputs and outputs are incorporated in a
JTAG scan path shown in Table 11, JTAG Boundary-
Scan Register. The types of boundary-scan cells are as
follows:
s
I = input cell
s
O = 3-state output cell
s
B = bidirectional (I/O) cell
s
OE = 3-state control cell
s
DC = bidirectional control cell
Table 10. JTAG Instruction Register
IR Cell #:
3
2
1
0
Parallel Input?
Y
Y
N
N
Always Logic 1?
N
N
N
Y
Always Logic 0?
N
N
Y
N
Data Sheet
DSP1629 Digital Signal Processor
January 2002
26
Agere Systems Inc.
4 Hardware Architecture
(continued)
Note that the direction of shifting is from TDI to cell 104 to cell 103 . . . to cell 0 of TDO.
* Please refer to the Pin Multiplexing section for a description of pin multiplexing of BIO, PHIF, VEC[3:0], and SIO2.
Note that shifting a zero into this cell in the mode to scan a zero into the chip will disable the processor clocks just as the STOP pin will.
When the JTAG SAMPLE instruction is used, this cell will have a logic one regardless of the state of the pin.
Table 11. JTAG Boundary-Scan Register
Cell
Type
Signal Name/Function
Cell
Type
Signal Name/Function
0
OE
Controls cells 1, 27--31
69
B
OCK2/PCSN
*
1
O
CKO
70
DC
Controls cell 71
2
I
RSTB
71
B
DO2/PSTAT*
3
DC
Controls cell 4
72
DC
Controls cell 73
4
B
TRAP 73
B
SYNC2/PBSEL*
5
I
STOP
74
DC
Controls cell 75
6
O
IACK
75
B
ILD2/PIDS*
7
I
INT0
76
DC
Controls cell 77
8
OE
Controls cells 6, 10--25, 49, 50, 78, 79
77
B
OLD2/PODS*
9
I
INT1
78
O
IBF2/PIBF*
10--25
O
AB[0:15]
79
O
OBE2/POBE*
26
I
EXM
80
DC
Controls cell 81
27
O
RWN
81
B
ICK2/PB0*
28--31
O
EROM, ERAMLO, ERAMHI, IO
82
DC
Controls cell 83
32--36
B
DB[0:4]
83
B
DI2/PB1*
37
DC
Controls cells 32--36, 38--48
84
DC
Controls cell 85
38--48
B
DB[5:15]
85
B
DOEN2/PB2*
49
O
OBE1
86
DC
Controls cell 87
50
O
IBF1
87
B
SADD2/PB3*
51
I
DI1
88
DC
Controls cell 89
52
DC
Controls cell 53
89
B
IOBIT0/PB4*
53
B
ILD1
90
DC
Controls cell 91
54
DC
Controls cell 55
91
B
IOBIT1/PB5*
55
B
ICK1
92
DC
Controls cell 93
56
DC
Controls cell 57
93
B
IOBIT2/PB6*
57
B
OCK1
94
DC
Controls cell 95
58
DC
Controls cell 59
95
B
IOBIT3/PB7*
59
B
OLD1
96
DC
Controls cell 97
60
OE
Controls cell 61
97
B
VEC3/IOBIT4*
61
O
DO1
98
DC
Controls cell 99
62
DC
Controls cell 63
99
B
VEC2/IOBIT5*
63
B
SYNC1
100
DC
Controls cell 101
64
DC
Controls cell 65
101
B
VEC1/IOBIT6*
65
B
SADD1
102
DC
Controls cell 103
66
DC
Controls cell 67
103
B
VEC0/IOBIT7*
67
B
DOEN1
104
I
CKI
68
DC
Controls cell 69
--
--
--
Data Sheet
January 2002
DSP1629 Digital Signal Processor
Agere Systems Inc.
27
4 Hardware Architecture
(continued)
4.12 Clock Synthesis
Figure 7. Clock Source Block Diagram
powerc
RING
OSCILLATOR
M
U
X
2
N
PHASE
DETECTOR
CHARGE
PUMP
VCO
VCO CLOCK
f
VCO
LOOP
FILTER
M
LF[3:0]
Mbits[4:0]
Nbits[2:0]
PLL/SYNTHESIZER
CKI INPUT CLOCK
LOCK
(FLAG TO INDICATE LOCK
CONDITION OF PLL)
f
CKI
f
SLOW CLOCK
SLOWCKI
pllc
PLLEN
INTERNAL
PROCESSOR
CLOCK
f
INTERNAL CLOCK
PLLSEL
f
CKI
5-4520 (F)
The DSP1629 provides an on-chip, programmable
clock synthesizer. Figure 7, Clock Source Block Dia-
gram, is the clock source diagram. The 1X CKI input
clock, the output of the synthesizer, or a slow internal
ring oscillator can be used as the source for the internal
DSP clock. The clock synthesizer is based on a phase-
locked loop (PLL), and the terms clock synthesizer and
PLL are used interchangeably.
On powerup, CKI is used as the clock source for the
DSP. This clock is used to generate the internal proces-
sor clocks and CKO, where f
CKI
= f
CKO
. Setting the ap-
propriate bits in the pllc control register (described in
Table 32, Phase-Locked Loop Control (pllc) Register)
will enable the clock synthesizer to become the clock
source. The powerc register, which is discussed in Sec-
tion 4.13, Power Management, can override the selec-
tion to stop clocks or force the use of the slow clock for
low-power operation.
PLL Control Signals
The input to the PLL comes from one of the three mask-
programmable clock options: CMOS or small-signal.
The PLL cannot operate without an external input clock.
To use the PLL, the PLL must first be allowed to stabi-
lize and lock to the programmed frequency. After the
PLL has locked, the LOCK flag is set and the lock detect
circuitry is disabled. The synthesizer can then be used
as the clock source. Setting the PLLSEL bit in the pllc
register will switch sources from f
CKI
to f
VCO
/2 without
glitching. It is important to note that the setting of the pllc
register must be maintained. Otherwise, the PLL will
seek the new set point. Every time the pllc register is
written, the LOCK flag is reset.
Data Sheet
DSP1629 Digital Signal Processor
January 2002
28
Agere Systems Inc.
4 Hardware Architecture
(continued)
The frequency of the PLL output clock, f
VCO
, is deter-
mined by the values loaded into the 3-bit N divider and
the 5-bit M divider. When the PLL is selected and
locked, the frequency of the internal processor clock is
related to the frequency of CKI by the following equa-
tions:
f
VCO
= f
CKI
* M/N
f
INTERNAL CLOCK
= f
CKO
= f
VCO
2
The frequency of the VCO, f
VCO
, must fall within the
range listed in Table 63, PLL Electrical Specifications,
VCO Frequency Ranges. Also note that f
VCO
must be at
least twice f
CKI
.
The coding of the Mbits and Nbits is described as fol-
lows:
Mbits = M
-
-
-
-
2
if (N = 1)
Nbits = 0x7
else
Nbits = N
-
-
-
-
2
where N ranges from 1 to 8 and M ranges from 2 to 20.
The loop filter bits LF[3:0] should be programmed ac-
cording to Table 64, PLL Electrical Specifications and
pllc Register Settings.
Two other bits in the pllc register control the PLL. Clear-
ing the PLLEN bit powers down the PLL; setting this bit
powers up the PLL. Clearing the PLLSEL bit deselects
the PLL so that the DSP is clocked by a 1X version of
the CKI input; setting the PLLSEL bit selects the PLL-
generated clock for the source of the DSP internal pro-
cessor clock. The pllc register is cleared on reset and
powerup. Therefore, the DSP comes out of reset with
the PLL deselected and powered down. M and N should
be changed only while the PLL is deselected. The val-
ues of M and N should not be changed when powering
down or deselecting the PLL.
As previously mentioned, the PLL also provides a user
flag, LOCK, to indicate when the loop has locked. When
this flag is not asserted, the PLL output is unstable. The
DSP should not be switched to the PLL-based clock
without first checking that the lock flag is set. The lock
flag is cleared by writing to the pllc register. When the
PLL is deselected, it is necessary to wait for the PLL to
relock before the DSP can be switched to the PLL-
based clock. Before the input clock is stopped, the PLL
should be powered down. Otherwise, the LOCK flag will
not be reset and there may be no way to determine if the
PLL is stable, once the input clock is applied again.
The lock-in time depends on the frequency of operation
and the values programmed for M and N (see Table 64,
PLL Electrical Specifications and pllc Register Set-
tings).
Data Sheet
January 2002
DSP1629 Digital Signal Processor
Agere Systems Inc.
29
4 Hardware Architecture
(continued)
PLL Programming Examples
The following section of code illustrates how the PLL would be initialized on powerup, assuming the following oper-
ating conditions:
s
CKI input frequency = 10 MHz
s
Internal clock and CKO frequency = 50 MHz
s
VCO frequency = 100 MHz
s
Input divide down count N = 2 (Set Nbits[2:0] = 000 to get N = 2, as described in Table 32, Phase-Locked Loop
Control (pllc) Register.)
s
Feedback down count M = 20 (Set Mbits[4:0] = 10010 to get M = 18 + 2 = 20, as described in Table 32, Phase-
Locked Loop Control (pllc) Register.)
The device would come out of reset with the PLL disabled and deselected.
pllinit: pllc = 0x2912
/* Running CKI input clock at 10 MHz, set up counters in PLL */
pllc = 0xA912 /* Power on PLL, but PLL remains deselected */
call pllwait
/* Loop to check for LOCK flag assertion */
pllc = 0xE912 /* Select high-speed, PLL clock */
goto start
/* User's code, now running at 50 MHz */
pllwait: if lock return
goto pllwait
Programming examples which illustrate how to use the PLL with the various power management modes are listed
in Section 4.13, Power Management.
Latency
The switch between the CKI-based clock and the PLL-based clock is synchronous. This method results in the actual
switch taking place several cycles after the PLLSEL bit is changed. During this time, actual code can be executed,
but it will be at the previous clock rate. Table 12, Latency Times for Switching Between CKI and PLL-Based Clocks,
shows the latency times for switching between CKI-based and PLL-based clocks. In the example given, the delay
to switch to the PLL source is 1--4 CKO cycles, and to switch back is 11--31 CKO cycles.
Frequency Accuracy and Jitter
When using the PLL to multiply the input clock frequency up to the instruction clock rate, it is important to realize
that although the average frequency of the internal clock and CKO will have about the same relative accuracy as
the input clock, noise sources within the DSP will produce jitter on the PLL clock so that each individual clock period
will have some error associated with it. The PLL is guaranteed only to have sufficiently low jitter to operate the DSP,
and thus, this clock should not be used as an input to jitter-sensitive devices in the system.
V
DDA
and V
SSA
Connections
The PLL has its own power and ground pins, V
DDA
and V
SSA
. Additional filtering should be provided for V
DDA
in the
form of a ferrite bead connected from V
DDA
to V
DD
and two decoupling capacitors (4.7
F tantalum in parallel with
a 0.01
F ceramic) from V
DDA
to V
SS
. V
SSA
can be connected directly to the main ground plane. This recommen-
dation is subject to change and may need to be modified for specific applications, depending on the characteristics
of the supply noise.
Note: For devices with the CMOS clock input option, the CKI2 pin should be connected to V
SSA
.
Table 12. Latency Times for Switching Between CKI and PLL-Based Clocks
Minimum Latency (Cycles)
Maximum Latency (Cycles)
Switch to PLL-Based Clock
1
N + 2
Switch from PLL-Based Clock
M/N + 1
M + M/N + 1
Data Sheet
DSP1629 Digital Signal Processor
January 2002
30
Agere Systems Inc.
4 Hardware Architecture
(continued)
4.13 Power Management
There are three different control mechanisms for putting
the DSP1629 into low-power modes: the powerc control
register, the STOP pin, and the AWAIT bit in the alf reg-
ister. The PLL can also be disabled with the PLLEN bit
of the pllc register for more power saving.
Powerc Control Register Bits
The powerc register has 10 bits that power down vari-
ous portions of the chip and select the clock source:
XTLOFF: Assertion of the XTLOFF bit powers down the
small-signal input circuit, disabling the internal proces-
sor clock. Since the small-signal input circuit takes
many cycles to stabilize, care must be taken with the
turn-on sequence, as described later.
SLOWCKI: Assertion of the SLOWCKI bit selects the
ring oscillator as the clock source for the internal pro-
cessor clock instead of CKI or the PLL. When CKI or the
PLL is selected, the ring oscillator is powered down.
Switching of the clocks is synchronized so that no par-
tial or short clock pulses occur. Two nops should follow
the instruction that sets or clears SLOWCKI.
NOCK: Assertion of the NOCK bit synchronously turns
off the internal processor clock, regardless of whether
its source is provided by CKI, the PLL, or the ring oscil-
lator. The NOCK bit can be cleared by resetting the chip
with the RSTB pin, or asserting the INT0 or INT1 pins.
Two nops should follow the instruction that sets NOCK.
The PLL remains running, if enabled, while NOCK is
set.
INT0EN: This bit allows the INT0 pin to asynchronously
clear the NOCK bit, thereby allowing the device to con-
tinue program execution from where it left off without
any loss of state. No chip reset is required. It is recom-
mended that, when INT0EN is to be used, the INT0
interrupt be disabled in the inc register so that an unin-
tended interrupt does not occur. After the program re-
sumes, the INT0 interrupt in the ins register should be
cleared.
INT1EN: This bit enables the INT1 pin to be used as the
NOCK clear, exactly like INT0EN, previously described.
The following control bits power down the peripheral
I/O units of the DSP. These bits can be used to further
reduce the power consumption during standard sleep
mode.
SIO1DIS: This is a powerdown signal to the SIO1 I/O
unit. It disables the clock input to the unit, thus eliminat-
ing any sleep power associated with the SIO1. Since
the gating of the clocks may result in incomplete trans-
actions, it is recommended that this option be used in
applications where the SIO1 is not used or when reset
may be used to reenable the SIO1 unit. Otherwise, the
first transaction after reenabling the unit may be corrupt-
ed.
SIO2DIS: This bit powers down the SIO2 in the same
way SIO1DIS powers down the SIO1.
PHIFDIS: This is a powerdown signal to the parallel
host interface. It disables the clock input to the unit, thus
eliminating any sleep power associated with the PHIF.
Since the gating of the clocks may result in incomplete
transactions, it is recommended that this option be used
in applications where the PHIF is not used, or when re-
set may be used to reenable the PHIF. Otherwise, the
first transaction after reenabling the unit may be corrupt-
ed.
TIMERDIS: This is a timer disable signal which disables
the clock input to the timer unit. Its function is identical
to the DISABLE field of the timerc control register. Writ-
ing a 0 to the TIMERDIS field will continue the timer op-
eration.
Figure 8, Power Management Using the powerc and the
pllc Registers, shows a functional view of the effect of
the bits of the powerc register on the clock circuitry. It
shows only the high-level operation of each bit. Not
shown are the bits that power down the peripheral units.
STOP Pin
Assertion (active-low) of the STOP pin has the same ef-
fect as setting the NOCK bit in the powerc register. The
internal processor clock is synchronously disabled until
the STOP pin is returned high. Once the STOP pin is re-
turned high, program execution will continue from
where it left off without any loss of state. No chip reset
is required. The PLL remains running, if enabled, during
STOP assertion.
The pllc Register Bits
The PLLEN bit of the pllc register can be used to power
down the clock synthesizer circuitry. Before shutting
down the clock synthesizer circuitry, the system clock
should be switched to either CKI using the PLLSEL bit
of pllc, or to the ring oscillator using the SLOWCKI bit of
powerc.
Data Sheet
January 2002
DSP1629 Digital Signal Processor
Agere Systems Inc.
31
4 Hardware Architecture
(continued)
Notes:
The functions in the shaded ovals are bits in the powerc control register. The functions in the nonshaded ovals are bits in the pllc control register.
Deep sleep is the state arrived at either by a hardware or software stop of the internal processor clock.
The switching of the multiplexers and the synchronous gate is designed so that no partial clocks or glitching will occur.
When the deep sleep state is entered with the ring oscillator selected, the internal processor clock is turned off before the ring oscillator is pow-
ered down.
PLL select is the PLLSEL bit of pllc; PLL powerdown is the PLLEN bit of pllc.
Figure 8. Power Management Using the powerc and the pllc Registers
CKI2
SMALL SIGNAL
CLOCK
RING
OSCILLATOR
STOP
XTLOFF
MASK-PROGRAMMABLE
OPTION
OFF
CKI
RSTB
CMOS
INPUT
CLOCK
SYNC.
GATE
SLOWCKI
SYNC.
MUX
INTERNAL
PROCESSOR
CLOCK
CLEAR NOCK
DISABLE
INT0
INT0EN
ON
INT1
INT1EN
DEEP
SLEEP
HW STOP
SW STOP
NOCK
PLLEN
PLLSEL
PLL
f
VCO/2
f
SLOW CLOCK
f
INTERNAL CLOCK
f
CKI
DEEP
SLEEP
5-4124 (F).h
Data Sheet
DSP1629 Digital Signal Processor
January 2002
32
Agere Systems Inc.
4 Hardware Architecture
(continued)
Await Bit of the alf Register
Setting the AWAIT bit of the alf register causes the pro-
cessor to go into the standard sleep state or power-sav-
ing standby mode. Operation of the AWAIT bit is the
same as in the DSP1610, DSP1611, DSP1616,
DSP1617, and DSP1618. In this mode, the minimum
circuitry required to process an incoming interrupt re-
mains active, and the PLL remains active if enabled. An
interrupt will return the processor to the previous state,
and program execution will continue. The action result-
ing from setting the AWAIT bit and the action resulting
from setting bits in the powerc register are mostly inde-
pendent. As long as the processor is receiving a clock,
whether slow or fast, the DSP may be put into standard
sleep mode with the AWAIT bit. Once the AWAIT bit is
set, the STOP pin can be used to stop and later restart
the processor clock, returning to the standard sleep
state. If the processor clock is not running, however, the
AWAIT bit cannot be set.
Power Management Sequencing
There are important considerations for sequencing the
power management modes. The small-signal clock in-
put circuit has a start-up delay which must be taken into
account, and the PLL requires a delay to reach lock-in.
Also, the chip may or may not need to be reset following
a return from a low-power state.
Devices with a small-signal input clocking option may
use the XTLOFF bit in the powerc register to power
down the on-chip oscillator or small-signal circuitry,
thereby reducing the power dissipation. When reen-
abling the oscillator or the small-signal circuitry, it is im-
portant to bear in mind that a start-up interval exists,
during which time the clocks are not stable.
Two scenarios exist here:
1. Immediate Turn-Off, Turn-On with RSTB: This sce-
nario applies to situations where the target device is
not required to execute any code while the small-sig-
nal input circuit is powered down, and where restart
from a reset state can be tolerated. In this case, the
processor clock derived from either the oscillator or
the small-signal input is running when XTLOFF is as-
serted. This effectively stops the internal processor
clock. When the system chooses to reenable the os-
cillator or small-signal input, a reset of the device will
be required. The reset pulse must be of sufficient du-
ration for the small-signal start-up interval to be sat-
isfied (required for the small-signal input circuit to
reach its dc operating point). A minimum reset pulse
of 20 s will be adequate. The falling edge of the re-
set signal, RSTB, will asynchronously clear the
XTLOFF field, thus reenabling the power to the
small-signal circuitry. The target DSP will then start
execution from a reset state, following the rising
edge of RSTB.
2. Running from Slow Clock While XTLOFF Active: The
second scenario applies to situations where the de-
vice needs to continue execution of its target code.
In this case, the device switches to the slow ring os-
cillator clock first by enabling the SLOWCKI field.
Then, if the small-signal input is being used, power
down this circuitry by writing a 1 to the XTLOFF field.
Two nops are needed in between the two write oper-
ations to the powerc register. The target device will
then continue execution of its code at slow speed,
while the small-signal input clock is turned off.
Switching from the slow clock back to the high-speed
clock is then accomplished in three user steps. First,
XTLOFF is cleared. Then, a user-programmed rou-
tine sets the internal timer to a delay to wait for the
small-signal input oscillations to become stable.
When the timer counts down to zero, the high-speed
clock is selected by clearing the SLOWCKI field, ei-
ther in the timer's interrupt service routine or follow-
ing a timer polling loop. If PLL operation is desired,
then an additional routine is necessary to enable the
PLL and wait for it to lock.
Data Sheet
January 2002
DSP1629 Digital Signal Processor
Agere Systems Inc.
33
4 Hardware Architecture
(continued)
Power Management Examples Without the PLL
The following examples show the more significant options for reducing the power dissipation. These are valid only
if the pllc register is set to disable and deselect the PLL (PLLEN = 0, PLLSEL = 0).
Standard Sleep Mode. This is the standard sleep mode. While the processor is clocked with a high-speed clock,
CKI, the alf register's AWAIT bit is set. Peripheral units may be turned off to further reduce the sleep power.
powerc = 0X00F0
/* Turn off peripherals, core running with CKI */
sleep:a0 = 0x8000
/* Set alf register in cache loop if running from */
do 1 {
/* external memory with >1 wait state */
alf = a0
/* Stop internal processor clock, interrupt circuits */
nop
/* active */
}
nop
/* Needed for bedtime execution. Only sleep power */
nop
/* consumed here until.... interrupt wakes up the device */
cont: . . .
/* User code executes here */
powerc = 0x0
/* Turn peripheral units back on */
Sleep with Slow Internal Clock. In this case, the ring oscillator is selected to clock the processor before the device
is put to sleep. This will reduce the power dissipation while waiting for an interrupt to continue program execution.
powerc = 0x40F0
/* Turn off peripherals and select slow clock */
2*nop
/* Wait for it to take effect */
sleep:a0 = 0x8000
/* Set alf register in cache loop if running from */
do 1 {
/* external memory with >1 wait state */
alf = a0
/* Stop internal processor clock, interrupt circuits */
nop
/* active */
}
nop
/* Needed for bedtime execution. Reduced sleep power */
nop
/* consumed here.... Interrupt wakes up the device */
cont: . . .
/* User code executes here */
powerc = 0x00F0
/* Select high-speed clock */
2*nop
/* Wait for it to take effect */
powerc = 0x0000
/* Turn peripheral units back on */
Note that, in this case, the wake-up latency is determined by the period of the ring oscillator clock.
Sleep with Slow Internal Clock and Small-Signal Disabled. If the target device contains the small-signal clock
option, the clock input circuitry can be powered down to further reduce power. In this case, the slow clock must be
selected first.
powerc = 0x40F0
/* Turn off peripherals and select slow clock */
2*nop
/* Wait for it to take effect */
powerc = 0xC0F0
/* Turn off the small-signal input buffer */
sleep:a0 = 0x8000
/* Set alf register in cache loop if running from */
do 1 {
/* external memory with >1 wait state */
alf = a0
/* Stop internal processor clock, interrupt circuits */
nop
/* active */
}
nop
/* Needed for bedtime execution. Reduced sleep power */
nop
/* consumed here.... Interrupt wakes up the device */
powerc = 0x40F0
/* Clear XTLOFF, reenable small-signal */
call xtlwait
/* Wait until small-signal is stable */
cont: powerc = 0x00F0
/* Select high-speed clock */
2*nop
/* Wait for it to take effect */
powerc = 0x0000
/* Turn peripheral units back on */
Note that, in this case, the wake-up latency is dominated by the small-signal start-up period.
Data Sheet
DSP1629 Digital Signal Processor
January 2002
34
Agere Systems Inc.
4 Hardware Architecture
(continued)
Software Stop. In this case, all internal clocking is disabled. INT0, INT1, or RSTB may be used to reenable the
clocks.The power management must be done in correct sequence.
powerc = 0x4000
/* SLOWCKI asserted */
2*nop
/* Wait for it to take effect */
powerc = 0xD000
/* XTLOFF asserted if applicable and INT0EN asserted */
inc = NOINT0
/* Disable the INT0 interrupt */
sopor:powerc = 0xF000
/* NOCK asserted, all clocks stop */
/* Minimum switching power consumed here */
3*nop
/* Some nops will be needed */
/* INT0 pin clears the NOCK field, clocking resumes */
cont: powerc = 0x4000
/* INT0EN cleared and XTLOFF cleared, if applicable*/
call waitxtl
/* Wait for the small-signal to */
/* stabilize, if applicable*/
powerc = 0x0
/* Clear SLOWCKI field, back to high speed */
2*nop
/* Wait for it to take effect */
ins = 0x0010
/* Clear the INT0 status bit */
In this case also, the wake-up latency is dominated by the small-signal start-up period.
The previous examples do not provide an exhaustive list of options available to the user. Many different clocking
possibilities exist for which the target device may be programmed, depending on:
s
The clock source to the processor.
s
Whether the user chooses to power down the peripheral units.
s
The operational state of the small-signal clock input, powered or unpowered.
s
Whether the internal processor clock is disabled through hardware or software.
s
The combination of power management modes the user chooses.
s
Whether or not the PLL is enabled.
An example subroutine for xtlwait follows:
xtlwait:
timer0 = 0x2710
/* Load a count of 10,000 into the timer
*/
timerc = 0x0010
/* Start the timer with a PRESCALE of two */
inc = 0x0000
/* Disable the interrupts
*/
loop1:
a0 = ins
/* Poll the ins register
*/
a0 = a0 & 0x0100
/* Check bit 8 (TIME) of the ins register */
if eq goto loop1
/* Loop if the bit is not set
*/
ins = 0x0100
/* Clear the TIME interrupt bit
*/
return
/* Return to the main program
*/
Data Sheet
January 2002
DSP1629 Digital Signal Processor
Agere Systems Inc.
35
4 Hardware Architecture
(continued)
Power Management Examples with the PLL
The following examples show the more significant options for reducing power dissipation if operation with the PLL
clock synthesizer is desired.
Standard Sleep Mode, PLL Running. This mode would be entered in the same manner as without the PLL. While
the input to the clock synthesizer, CKI, remains running, the alf register's AWAIT bit is set. The PLL will continue to
run and dissipate power. Peripheral units may be turned off to further reduce the sleep power.
powerc = 0x00F0
/* Turn off peripherals, core running with PLL */
sleep:a0 = 0x8000
/* Set alf register in cache loop if running from */
do 1 {
/* external memory with >1 wait state */
alf = a0
/* Stop internal processor clock, interrupt circuits */
nop
/* active */
}
nop
/* Needed for bedtime execution. Only sleep power plus PLL */
nop
/* power consumed here.... Interrupt wakes up the device */
cont: . . .
/* User code executes here */
powerc = 0x0
/* Turn peripheral units back on */
Sleep with Slow Internal Clock, PLL Running. In this case, the ring oscillator is selected to clock the processor
before the device is put to sleep. This will reduce power dissipation while waiting for an interrupt to continue program
execution.
powerc = 0x40F0
/* Turn off peripherals and select slow clock */
2*nop
/* Wait for slow clock to take effect */
sleep:a0 = 0x8000
/* Set alf register in cache loop if running from */
do 1 {
/* external memory with >1 wait state */
alf = a0
/* Stop internal processor clock, interrupt circuits */
nop
/* active */
}
nop
/* Needed for bedtime execution. Reduced sleep power, PLL */
nop
/* power, and ring oscillator power consumed here... */
/* Interrupt wakes up the device */
cont: . . .
/* User code executes here */
powerc = 0x00F0
/* Select high-speed PLL based clock */
2*nop
/* Wait for it to take effect */
powerc = 0x0000
/* Turn peripheral units back on */
Data Sheet
DSP1629 Digital Signal Processor
January 2002
36
Agere Systems Inc.
4 Hardware Architecture
(continued)
Sleep with Slow Internal Clock and Small-Signal Disabled, PLL Disabled. If the target device contains the small-
signal clock option, the clock input circuitry can be powered down to further reduce power. In this case, the slow
clock must be selected first, and then the PLL must be disabled, since the PLL cannot run without the clock input
circuitry being active.
powerc = 0x40F0
/* Turn off peripherals and select slow clock */
2*nop
/* Wait for slow clock to take effect */
pllc = 0x29F2
/* Disable PLL (assume N = 1,M = 20, LF = 1001) */
powerc = 0xC0F0
/* Disable small-signal input buffer */
sleep:a0 = 0x8000
/* Set alf register in cache loop if running from */
do 1 {
/* external memory with >1 wait state */
alf = a0
/* Stop internal processor clock, interrupt circuits */
nop
/* active */
}
nop
/* Needed for bedtime execution. Reduced sleep power
nop
/* consumed here.... Interrupt wakes up device */
powerc = 0x40F0
/* Clear XTLOFF, leave PLL disabled */
call xtlwait
/* Wait until small-signal is stable */
pllc = 0xE9F2
/* Enable PLL, continue to run off slow clock */
call pllwait
/* Loop to check for LOCK flag assertion */
cont: powerc = 0x00F0
/* Select high-speed PLL based clock */
2*nop
/* Wait for it to take effect */
powerc = 0x0000
/* Turn peripherals back on */
Software Stop, PLL Disabled. In this case, all internal clocking is disabled. INT0, INT1, or RSTB may be used to
reenable the clocks. The power management must be done in the correct sequence, with the PLL being disabled
before shutting down the clock input buffer.
powerc = 0x4000
/* SLOWCKI asserted */
2*nop
/* Wait for slow clock to take effect */
pllc = 0x29F2
/* Disable PLL (assume N = 1, M = 20, LF = 1001) */
powerc = 0xD000
/* XTLOFF asserted, if applicable and INT0EN
/* asserted */
sopor:powerc = 0xF000
/* NOCK asserted, all clocks stop */
/* Minimum switching power consumed here */
3*nop
/* Some nops will be needed */
/* INT0 pin clears NOCK field, clocking resumes */
cont: powerc = 0x4000
/* INTOEN cleared and XTLOFF cleared, if applicable */
call xtlwait
/* Wait until small-signal is stable */
/* if applicable */
pllc = 0xE9F2
/* Enable PLL, continue to run off slow clock */
call pllwait
/* Loop to check for LOCK flag assertion */
powerc = 0x0
/* Select high-speed PLL based clock */
2*nop
/* Wait for it to take effect */
ins = 0x0010
/ *
Clear the INT0 status bit */
Data Sheet
January 2002
DSP1629 Digital Signal Processor
Agere Systems Inc.
37
5 Software Architecture
5.1 Instruction Set
The DSP1629 processor has seven types of instruc-
tions: multiply/ALU, special function, control, F3 ALU,
BMU, cache, and data move. The multiply/ALU instruc-
tions are the primary instructions used to implement sig-
nal processing algorithms. Statements from this group
can be combined to generate multiply/accumulate, log-
ical, and other ALU functions and to transfer data be-
tween memory and registers in the data arithmetic unit.
The special function instructions can be conditionally
executed based on flags from the previous ALU or BMU
operation, the condition of one of the counters, or the
value of a pseudorandom bit in the DSP1629 device.
Special function instructions perform shift, round, and
complement functions. The F3 ALU instructions enrich
the operations available on accumulators. The BMU in-
structions provide high-performance bit manipulation.
The control instructions implement the goto and call
commands. Control instructions can also be executed
conditionally. Cache instructions are used to implement
low-overhead loops, conserve program memory, and
decrease the execution time of certain multiply/ALU in-
structions. Data move instructions are used to transfer
data between memory and registers or between accu-
mulators and registers. See the
DSP1611/17/18/27/28/
29 Digital Signal Processor
Information Manual for a de-
tailed description of the instruction set.
The following operators are used in describing the in-
struction set:
s
*
16 x 16-bit > 32-bit multiplication or register-
indirect addressing when used as a prefix to an
address register or denotes direct addressing
when used as a prefix to an immediate
s
+
36-bit addition
s
36-bit subtraction
s
>>
Arithmetic right shift
s
>>> Logical right shift
s
<<
Arithmetic left shift
s
<<< Logical left shift
s
|
36-bit bitwise OR
s
&
36-bit bitwise AND
s
^
36-bit bitwise EXCLUSIVE OR
s
:
Compound address swapping, accumulator
shuffling
s
~
One's complement
These are 36-bit operations. One operand is 36-bit data in an ac-
cumulator; the other operand may be 16 bits, 32 bits, or 36 bits.
Multiply/ALU Instructions
Note that the function statements and transfer state-
ments in Table 13, Multiply/ALU Instructions, are cho-
sen independently. Any function statement (F1) can be
combined with any transfer statement to form a valid
multiply/ALU instruction. If either statement is not re-
quired, a single statement from either column also con-
stitutes a valid instruction. The number of cycles to
execute the instruction is a function of the transfer col-
umn. (An instruction with no transfer statement exe-
cutes in one instruction cycle.) Whenever PC, pt, or rM
is used in the instruction and points to external memory,
the programmed number of wait-states must be added
to the instruction cycle count. All multiply/ALU instruc-
tions require one word of program memory. The no-op-
eration (nop) instruction is a special-case encoding of a
multiply/ALU instruction and executes in one cycle. The
assembly-language representation of a nop is either
nop or a single semicolon.
A single-cycle squaring function is provided in
DSP1629. By setting the X = Y = bit in the auc register,
any instruction that loads the high half of the y register
also loads the x register with the same value. A subse-
quent instruction to multiply the x register and y register
results in the square of the value being placed in the p
register. The instruction a0 = p p = x*y y = *r0++ with
the X = Y = bit set to one will read the value pointed to
by r0, load it to both x and y, multiply the previously
fetched value of x and y, and transfer the previous prod-
uct to a0. A table of values pointed to by r0 can thus be
squared in a pipeline with one instruction cycle per each
value. Multiply/ALU instructions that use x = X transfer
statements (such as a0 = p p = x*y y = *r0++ x = *pt++)
are not recommended for squaring because pt will be
incremented even though x is not loaded from the value
pointed to by pt. Also, the same conflict wait occurs from
reading the same bank of internal memory or reading
from external memory apply, since the X space fetch
occurs (even though its value is not used).
Data Sheet
DSP1629 Digital Signal Processor
January 2002
38
Agere Systems Inc.
5 Software Architecture
(continued)
The l in [ ] is an optional argument that specifies the low 16 bits of aT or y.
Add cycles for:
1. When an external memory access is made in X or Y space and wait-states are programmed, add the number of wait-states.
2. If an X-space access and a Y-space access are made to the same bank of DPRAM in one instruction, add one cycle.
Note: For transfer statements when loading the upper half of an accumulator, the lower half is cleared if the corre-
sponding CLR bit in the auc register is zero. auc is cleared by reset.
Table 13. Multiply/ALU Instructions
Function Statement
Transfer Statement
Cycles (Out/In Cache)
p = x * y
y = Y
x = X
2/1
aD = p
p = x * y
y = aT
x = X
2/1
aD = aS + p
p = x * y
y[l] = Y
1/1
aD = aS p
p = x * y
aT[l] = Y
1/1
aD = p
x = Y
1/1
aD = aS + p
Y
1/1
aD = aS p
Y = y[l]
2/2
aD = y
Y = aT[l]
2/2
aD = aS + y
Z:y
x = X
2/2
aD = aS y
Z:y[l]
2/2
aD = aS & y
Z:aT[l]
2/2
aD = aS | y
aD = aS ^ y
aS y
aS & y
Table 14. Replacement Table for Multiply/ALU Instructions
Replace
Value
Meaning
aD, aS, aT
a0, a1
One of two DAU accumulators.
X
*pt++, *pt++i
X memory space location pointed to by pt. pt is postmodified by +1 and
i, respectively.
Y
*rM, *rM++, *rM--, rM++j
RAM location pointed to by rM (M = 0, 1, 2, 3). rM is postmodified by
0, +1, 1, or j, respectively.
Z
*rMzp, *rMpz, *rMm2, *rMjk Read/write compound addressing. rM (M = 0, 1, 2, 3) is used twice.
First, postmodified by 0, +1, 1, or j, respectively; and, second, post-
modified by +1, 0, +2, or k, respectively.
Data Sheet
January 2002
DSP1629 Digital Signal Processor
Agere Systems Inc.
39
5 Software Architecture
(continued)
Special Function Instructions
All forms of the special function require one word of program memory and execute in one instruction cycle. (If PC
points to external memory, add programmed wait-states.)
aD = aS
Load destination accumulator from source accumulator
aD = aS
2's complement
aD = ~aS*
1's complement
aD = rnd(aS)
Round upper 20 bits of accumulator
aDh = aSh + 1 Increment upper half of accumulator (lower half cleared)
aD = aS + 1
Increment accumulator
aD = y
Load accumulator with 32-bit y register value with sign extend
aD = p
Load accumulator with 32-bit p register value with sign extend
The above special functions can be conditionally executed, as in:
if CON instruction
and with an event counter:
ifc CON instruction
which means:
if CON is true then
c1 = c1 + 1
instruction
c2 = c1
else
c1 = c1 + 1
The above special function statements can be executed unconditionally by writing them directly, e.g., a0 = a1.
*
This function is not available for the DSP16A.
aD = aS >> 1
aD = aS >> 4
aD = aS >> 8
aD = aS >> 16
}
Arithmetic right shift (sign preserved) of 36-bit accumulators
aD = aS << 1
aD = aS << 4
aD = aS << 8
aD = aS << 16
}
Arithmetic left shift (sign not preserved) of the lower 32 bits of accumulators
(upper 4 bits are sign-bit-extended from bit 31 at the completion of the shift)
Table 15. Replacement Table for Special Function Instructions
Replace
Value
Meaning
aD
aS
a0, a1
One of two DAU accumulators.
CON
mi, pl, eq, ne, gt, le, lvs, lvc, mvs, mvc, c0ge,
c0lt, c1ge, c1lt, heads, tails, true, false, allt, allf,
somet, somef, oddp, evenp, mns1, nmns1, npint,
njint, lock
See Table 17, DSP1629 Conditional Mne-
monics, for definitions of mnemonics.
Data Sheet
DSP1629 Digital Signal Processor
January 2002
40
Agere Systems Inc.
5 Software Architecture
(continued)
Control Instructions
All control instructions executed unconditionally execute in two cycles, except icall, which takes three cycles. Control
instructions executed conditionally execute in three instruction cycles. (If PC, pt, or pr point to external memory, add
programmed wait-states.) Control instructions executed unconditionally require one word of program memory, while
control instructions executed conditionally require two words. Control instructions cannot be executed from the
cache.
goto JA
goto pt
call JA
call pt
icall
return
(goto pr)
ireturn
(goto pi)
The goto JA and call JA instructions should not be placed in the last or next-to-last instruction before the boundary of a 4 Kwords page. If
the goto or call is placed there, the program counter will have incremented to the next page and the jump will be to the next page, rather than
to the desired current page.
The icall instruction is reserved for development system use.
The above control instructions, with the exception of ireturn and icall, can be conditionally executed. For example:
if le goto 0x0345
Table 16. Replacement Table for Control Instructions
Replace
Value
Meaning
CON
mi, pl, eq, ne, gt, le, nlvs, lvc, mvs, mvc, c0ge, c0lt,
c1ge, c1lt, heads, tails, true, false, allt, allf, somet,
somef, oddp, evenp, mns1, nmns1, npint, njint, lock
See Table 17, DSP1629 Conditional Mne-
monics, for definitions of mnemonics.
JA
12-bit value
Least significant 12 bits of absolute address
within the same 4 Kwords memory section.
Data Sheet
January 2002
DSP1629 Digital Signal Processor
Agere Systems Inc.
41
5 Software Architecture
(continued)
Conditional Mnemonics (Flags)
Table 17, DSP1629 Conditional Mnemonics, lists mnemonics used in conditional execution of special function and
control instructions.
Notes:
Testing the state of the counters (c0 or c1) automatically increments the counter by one.
The heads or tails condition is determined by a randomly set or cleared bit, respectively. The bit is randomly set with a probability of 0.5. A random
rounding function can be implemented with either heads or tails. The random bit is generated by a ten-stage pseudorandom sequence generator
(PSG) that is updated after either a heads or tails test. The pseudorandom sequence may be reset by writing any value to the pi register, except
during an interrupt service routine (ISR). While in an ISR, writing to the pi register updates the register and does not reset the PSG. If not in an
ISR, writing to the pi register resets the PSG. (The pi register is updated, but will be written with the contents of the PC on the next instruction.)
Interrupts must be disabled when writing to the pi register. If an interrupt is taken after the pi write, but before pi is updated with the PC value,
the ireturn instruction will not return to the correct location. If the RAND bit in the auc register is set, however, writing the pi register never resets
the PSG.
Table 17. DSP1629 Conditional Mnemonics
Test
Meaning
Test
Meaning
pl
Result is nonnegative (sign bit is bit 35) (
0).
mi
Result is negative (<0).
eq
Result is equal to 0 (=0).
ne
Result is not equal to 0
(
0).
gt
Result is greater than 0 (>0).
le
Result is less than or equal to 0 (
0).
lvs
Logical overflow set.
*
* Result is not representable in the 36-bit accumulators (36-bit overflow).
lvc
Logical overflow clear.
mvs
Mathematical overflow set.
Bits 35--31 are not the same (32-bit overflow).
mvc
Mathematical overflow clear.
c0ge
Counter 0 greater than or equal to 0.
c0lt
Counter 0 less than 0.
c1ge
Counter 1 greater than or equal to 0.
c1lt
Counter 1 less than 0.
heads
Pseudorandom sequence bit set.
tails
Pseudorandom sequence bit clear.
true
The condition is always satisfied in an if in-
struction.
false
The condition is never satisfied in an if instruc-
tion.
allt
All true, all BIO input bits tested compared
successfully.
allf
All false, no BIO input bits tested compared
successfully.
somet
Some true, some BIO input bits tested com-
pared successfully.
somef
Some false, some BIO input bits tested did not
compare successfully.
oddp
Odd parity, from BMU operation.
evenp
Even parity, from BMU operation.
mns1
Minus 1, result of BMU operation.
nmns1
Not minus 1, result of BMU operation.
npint
Not PINT, used by hardware development
system.
njint
Not JINT, used by hardware development
system.
lock
The PLL has achieved lock and is stable.
--
--
Data Sheet
DSP1629 Digital Signal Processor
January 2002
42
Agere Systems Inc.
5 Software Architecture
(continued)
F3 ALU Instructions
These instructions are implemented in the DSP1600 core. They allow accumulator two-operand operations with ei-
ther another accumulator, the p register, or a 16-bit immediate operand (IM16). The result is placed in a destination
accumulator that can be independently specified. All operations are done with the full 36 bits. For the accumulator
with accumulator operations, both inputs are 36 bits. For the accumulator with p register operations, the p register
is sign-extended into bits 35--32 before the operation. For the accumulator high with immediate operations, the im-
mediate is sign-extended into bits 35--32 and the lower bits 15--0 are filled with zeros, except for the AND opera-
tion, because they are filled with ones. These conventions allow the user to do operations with 32-bit immediates by
programming two consecutive 16-bit immediate operations. The F3 ALU instructions are shown in Table 18, F3 ALU
Instructions.
*
If PC points to external memory, add programmed wait-states.
The h and l are required notation in these instructions.
Note: The F3 ALU instructions that do not have a destination accumulator are used to set flags for conditional operations, i.e., bit test operations.
F4 BMU Instructions
The bit manipulation unit in the DSP1629 provides a set of efficient bit manipulation operations on accumulators. It
contains four auxiliary registers, ar<0--3> (arM, M = 0, 1, 2, 3), two alternate accumulators (aa0--aa1), which can
be shuffled with the working set, and four flags (oddp, evenp, mns1, and nmns1). The flags are testable by condi-
tional instructions and can be read and written via bits 4--7 of the alf register. The BMU also sets the LMI, LEQ,
LLV, and LMV flags in the psw register.
LMI = 1 if negative (i.e., bit 35 = 1)
LEQ = 1 if zero (i.e., bits 35--0 are 0)
LLV = 1 if (a) 36-bit overflow, or if (b) illegal shift on field width/offset condition
LMV = 1 if bits 31--35 are not the same (32-bit overflow)
The BMU instructions and cycle times follow. (If PC points to external memory, add programmed wait-states.) All
BMU instructions require 1 word of program memory unless otherwise noted. Please refer to the
DSP1611/17/18/
27/28/29 Digital Signal Processor
Information Manual for further discussion of the BMU instructions.
Table 18. F3 ALU Instructions
F3 ALU Instructions*
Cacheable (One-Cycle)
Not Cacheable (Two-Cycle)
aD = aS + aT
aD = aS aT
aD = aS & aT
aD = aS | aT
aD = aS ^ aT
aS aT
aS & aT
aD = aS + p
aD = aS p
aD = aS & p
aD = aS | p
aD = aS ^ p
aS p
aS & p
aD = aSh + IM16
aD = aSh IM16
aD = aSh & IM16
aD = aSh | IM16
aD = aSh ^ IM16
aSh IM16
aSh & IM16
aD = aSl + IM16
aD = aSl IM16
aD = aSl & IM16
aD = aSl | IM16
aD = aSl ^ IM16
aSl IM16
aSl & IM16
Data Sheet
January 2002
DSP1629 Digital Signal Processor
Agere Systems Inc.
43
5 Software Architecture
(continued)
s
Barrel Shifter:
aD = aS >> IM16
Arithmetic right shift by immediate (36-bit, sign filled in); 2-cycle, 2-word.
aD = aS >> arM
Arithmetic right shift by arM (36-bit, sign filled in); 1-cycle.
aD = aS >> aS
Arithmetic right shift by aS (36-bit, sign filled in); 2-cycle.
aD = aS >>> IM16
Logical right shift by immediate (32-bit shift, 0s filled in); 2-cycle, 2-word.
aD = aS >>> arM
Logical right shift by arM (32-bit shift, 0s filled in); 1-cycle.
aD = aS >>> aS
Logical right shift by aS (32-bit shift, 0s filled in); 2-cycle.
aD = aS << IM16
Arithmetic left shift
by immediate (36-bit shift, 0s filled in); 2-cycle, 2-word.
aD = aS << arM
Arithmetic left shift
by arM (36-bit shift, 0s filled in); 1-cycle.
aD = aS << aS
Arithmetic left shift
by aS (36-bit shift, 0s filled in); 2-cycle.
aD = aS <<< IM16
Logical left shift by immediate (36-bit shift, 0s filled in); 2-cycle, 2-word.
aD = aS <<< arM
Logical left shift by arM (36-bit shift, 0s filled in); 1-cycle.
aD = aS <<< aS
Logical left shift by aS (36-bit shift, 0s filled in); 2-cycle.
Not the same as the special function arithmetic left shift. Here, the guard bits in the destination accumulator are shifted into, not sign-extended.
s
Normalization and Exponent Computation:
aD = exp(aS)
Detect the number of redundant sign bits in accumulator; 1-cycle.
aD = norm(aS, arM)
Normalize aS with respect to bit 31, with exponent in arM; 1-cycle.
s
Bit Field Extraction and Insertion:
aD = extracts(aS, IM16) Extraction with sign extension, field specified as immediate; 2-cycle, 2-word.
aD = extracts(aS, arM) Extraction with sign extension, field specified in arM; 1-cycle.
aD = extractz(aS, IM16) Extraction with zero extension, field specified as immediate; 2-cycle, 2-word.
aD = extractz(aS, arM) Extraction with zero extension, field specified in arM; 1-cycle.
aD = insert(aS, IM16)
Bit field insertion, field specified as immediate; 2-cycle, 2-word.
aD = insert(aS, arM)
Bit field insertion, field specified in arM; 2-cycle.
Note: The bit field to be inserted or extracted is specified as follows. The width (in bits) of the field is the upper byte
of the operand (immediate or arM), and the offset from the LSB is in the lower byte.
s
Alternate Accumulator Set:
aD = aS:aa0
Shuffle accumulators with alternate accumulator 0 (aa0); 1-cycle.
aD = aS:aa1
Shuffle accumulators with alternate accumulator 1 (aa1); 1-cycle.
Note: The alternate accumulator gets what was in aS. aD gets what was in the alternate accumulator.
Table 19. Replacement Table for F3 ALU Instructions and F4 BMU Instructions
Replace Value
Meaning
aD, aT, aS
a0 or a1
One of the two accumulators.
IM16
immediate
16-bit data, sign-, zero-, or one-extended as appropriate.
arM
ar<0--3>
One of the auxiliary BMU registers.
Data Sheet
DSP1629 Digital Signal Processor
January 2002
44
Agere Systems Inc.
5 Software Architecture
(continued)
Cache Instructions
Cache instructions require one word of program memory. The do instruction executes in one instruction cycle, and
the redo instruction executes in two instruction cycles. (If PC points to external memory, add programmed wait-
states.) Control instructions and long immediate values cannot be stored inside the cache. The instruction formats
are as follows:
s
do K {
s
instr1
s
instr2
s
.
s
.
s
.
s
instrN
s
}
s
redo K
The assembly-language statement, do cloop (or redo cloop), is used to specify that the number of iterations is to be taken from the cloop
register. K is encoded as 0 in the instruction encoding to select cloop.
When the cache is used to execute a block of instructions, the cycle timings of the instructions are as follows:
1. In the first pass, the instructions are fetched from program memory and the cycle times are the normal out-of-
cache values, except for the last instruction in the block of N instructions. This instruction executes in two cycles.
2. During pass two through pass K 1, each instruction is fetched from cache and the in-cache timings apply.
3. During the last (Kth) pass, the block of instructions is fetched from cache and the in-cache timings apply, except
that the timing of the last instruction is the same as if it were out-of-cache.
4. If any of the instructions access external memory, programmed wait-states must be added to the cycle counts.
The redo instruction treats the instructions currently in the cache memory as another loop to be executed K times.
Using the redo instruction, instructions are reexecuted from the cache without reloading the cache.
The number of iterations, K, for a do or redo can be set at run time by first moving the number of iterations into the
cloop register (7 bits unsigned), and then issuing the do cloop or redo cloop. At the completion of the loop, the
value of cloop is decremented to 0; hence, cloop needs to be written before each do cloop or redo cloop.
Table 20. Replacement Table for Cache Instructions
Replace
Instruction
Encoding
Meaning
K
cloop
Number of times the instructions are to be executed taken from bits 0--6 of the cloop
register.
1 to 127
Number of times the instructions to be executed are encoded in the instruction.
N
1 to 15
1 to 15 instructions can be included.
Data Sheet
January 2002
DSP1629 Digital Signal Processor
Agere Systems Inc.
45
5 Software Architecture
(continued)
Data Move Instructions
Data move instructions normally execute in two instruction cycles. (If PC or rM point to external memory, any pro-
grammed wait-states must be added. In addition, if PC and rM point to the same bank of DPRAM, then one cycle
must be added.) Immediate data move instructions require two words of program memory; all other data move in-
structions require only one word. The only exception to these statements is a special case immediate load (short
immediate) instruction. If a YAAU register is loaded with a 9-bit short immediate value, the instruction requires only
one word of memory and executes in one instruction cycle. All data move instructions, except those doing long im-
mediate loads, can be executed from within the cache. The data move instructions are as follows:
s
R = IM16
s
aT[l] = R
s
SR = IM9
s
Y = R
s
R = Y
s
Z:R
s
R = aS[l]
s
DR = *(OFFSET)
s
(OFFSET) = DR
Notes:
sioc, sioc2, tdms, tdms2, srta, and srta2 registers are not readable.
When signed registers less than 16 bits wide (c0, c1, c2) are read, their contents are sign-extended to 16 bits. When unsigned registers less than
16 bits wide are read, their contents are zero-extended to 16 bits.
Loading an accumulator with a data move instruction does not affect the flags.
Table 21. Replacement Table for Data Move Instructions
Replace
Value
Meaning
R
Any of the registers in Table 51,
R Field
--
DR
r<0--3>, a0[l], a1[l], y[l], p, pl, x,
pt, pr, psw
Subset of registers accessible with direct addressing.
aS, aT
a0, a1
High half of accumulator.
Y
*rM, *rM++, *rM--, *rM++j
Same as in multiply/ALU instructions.
Z
*rMzp, *rMpz, *rMm2, *rMjk
Same as in multiply/ALU instructions.
IM16
16-bit value
Long immediate data.
IM9
9-bit value
Short immediate data for YAAU registers.
OFFSET
5-bit value from instruction
11-bit value in base register
Value in bits [15:5] of ybase register form the 11 most significant
bits of the base address. The 5-bit offset is concatenated to this to
form a 16-bit address.
SR
r<0--3>, rb, re, j, k
Subset of registers for short immediate.
Data Sheet
DSP1629 Digital Signal Processor
January 2002
46
Agere Systems Inc.
5 Software Architecture
(continued)
5.2 Register Settings
Table 22, Serial I/O Control Registers, through Table 38, ioc Register, describe the programmable registers of the
DSP1629 device. Table 40, Register Settings After Reset, describes the register settings after reset.
Note that the following abbreviations are used in the tables:
s
x = don't care
s
R = read only
s
W = read/write
The reserved (RSVD) bits in the tables should always be written with zeros to make the program compatible with
future chip versions.
Table 22. Serial I/O Control Registers
* See tdms register, SYNC field.
The bit definitions of the sioc2 register are identical to the sioc register bit definitions.
sioc
Bit
10
9
8
7
6
5
4
3
2
1
0
Field
DODLY
LD
CLK
MSB
OLD
ILD
OCK
ICK
OLEN
ILEN
Field
Value
Description
DODLY
0
1
DO changes on the rising edge of OCK.
DO changes on the falling edge of OCK. This delay in driving DO increases the hold
time on DO by half a cycle of OCK.
LD
0
1
In active mode, ILD1 and/or OLD1 = ICK1/16, active SYNC1 = ICK1/[128/256*].
In active mode, ILD1 and/or OLD1 = OCK1/16, active SYNC1 = OCK1/[128/256*].
CLK
00
01
10
11
Active clock = CKI/2 (1X).
Active clock = CKI/6 (1X).
Active clock = CKI/8 (1X).
Active clock = CKI/10 (1X).
MSB
0
1
LSB first.
MSB first.
OLD
0
1
OLD1 is an input (passive mode).
OLD1 is an output (active mode).
ILD
0
1
ILD1 is an input (passive mode).
ILD1 is an output (active mode).
OCK
0
1
OCK1 is an input (passive mode).
OCK1 is an output (active mode).
ICK
0
1
ICK1 is an input (passive mode).
ICK1 is an output (active mode).
OLEN
0
1
16-bit output.
8-bit output.
ILEN
0
1
16-bit input.
8-bit input.
sioc2
Bit
10
9
8
7
6
5
4
3
2
1
0
Field
DODLY2
LD2
CLK2
MSB2
OLD2
ILD2
OCK2
ICK2
OLEN2
ILEN2
Data Sheet
January 2002
DSP1629 Digital Signal Processor
Agere Systems Inc.
47
5 Software Architecture
(continued)
Table 23. Time-Division Multiplex Slot Registers
* See sioc register, LD field.
Select this mode when in multiprocessor mode.
The tdms2 register bit definitions are identical to the tdms register bit definitions.
tdms
Bit
9
8
7
6
5
4
3
2
1
0
Field
SYNCSP
MODE
TRANSMIT SLOT
SYNC
Field
Value
Description
SYNCSP*
0
1
SYNC1 = ICK1/128 if LD = 0*.
SYNC1 = OCK1/128 if LD = 1*.
SYNC1 = ICK1/256 if LD = 0*.
SYNC1 = OCK1/256 if LD = 1*.
MODE
0
Multiprocessor mode off; DOEN1 is an input (passive mode).
1
Multiprocessor mode on; DOEN1 is an output (active mode).
TRANSMIT SLOT
1xxxxxx
Transmit slot 7.
x1xxxxx
Transmit slot 6.
xx1xxxx
Transmit slot 5.
xxx1xxx
Transmit slot 4.
xxxx1xx
Transmit slot 3.
xxxxx1x
Transmit slot 2.
xxxxxx1
Transmit slot 1.
SYNC
1
Transmit slot 0, SYNC1 is an output (active mode).
0
SYNC1 is an input (passive mode).
tdms2
Bit
9
8
7
6
5
4
3
2
1
0
Field
SYNCSP2*
MODE2
TRANSMIT SLOT2
SYNC2
Data Sheet
DSP1629 Digital Signal Processor
January 2002
48
Agere Systems Inc.
5 Software Architecture
(continued)
Table 24. Serial Receive/Transmit Address Registers
Table 25. Multiprocessor Protocol Registers
The saddx2 field definitions are identical to the saddx register field definitions.
srta
Bit
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Field
RECEIVE ADDRESS
TRANSMIT ADDRESS
Field
Value
Description
RECEIVE ADDRESS
1xxxxxxx
Receive address 7.
x1xxxxxx
Receive address 6.
xx1xxxxx
Receive address 5.
xxx1xxxx
Receive address 4.
xxxx1xxx
Receive address 3.
xxxxx1xx
Receive address 2.
xxxxxx1x
Receive address 1.
xxxxxxx1
Receive address 0.
TRANSMIT ADDRESS
1xxxxxxx
Transmit address 7.
x1xxxxxx
Transmit address 6.
xx1xxxxx
Transmit address 5.
xxx1xxxx
Transmit address 4.
xxxx1xxx
Transmit address 3.
xxxxx1xx
Transmit address 2.
xxxxxx1x
Transmit address 1.
xxxxxxx1
Transmit address 0.
srta2
*
* The srta2 field definitions are identical to the srta register field definitions.
Bit
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Field
RECEIVE ADDRESS2
TRANSMIT ADDRESS2
saddx
Bit Field
15--8
7--0
Write
X
Write Protocol Field [7:0]
Read
Read Protocol Field [7:0]
0
saddx2
Bit Field
15--8
7--0
Write
X
Write Protocol2 Field [7:0]
Read
Read Protocol2 Field [7:0]
0
Data Sheet
January 2002
DSP1629 Digital Signal Processor
Agere Systems Inc.
49
5 Software Architecture
(continued)
The auc is 9 bits [8:0]. The upper 7 bits [15:9] are always zero when read and should always be written with zeros to make the program
compatible with future chip versions. The auc register is cleared at reset.
Table 26. Processor Status Word (psw) Register
Bit
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Field
DAU FLAGS
X
X
a1[V]
a1[35:32]
a0[V]
a0[35:32]
Field
Value
Description
DAU FLAGS
*
* The DAU flags can be set by either BMU or DAU operations.
Wxxx
LMI--logical minus when set (bit 35 = 1).
xWxx
LEQ--logical equal when set (bit [35:0] = 0).
xxWx
LLV--logical overflow when set.
xxxW
LMV--mathematical overflow when set.
a1[V]
W
Accumulator 1 (a1) overflow when set.
a1[35:32]
Wxxx
Accumulator 1 (a1) bit 35.
xWxx
Accumulator 1 (a1) bit 34.
xxWx
Accumulator 1 (a1) bit 33.
xxxW
Accumulator 1 (a1) bit 32.
a0[V]
W
Accumulator 0 (a0) overflow when set.
a0[35:32]
Wxxx
Accumulator 0 (a0) bit 35.
xWxx
Accumulator 0 (a0) bit 34.
xxWx
Accumulator 0 (a0) bit 33.
xxxW
Accumulator 0 (a0) bit 32.
Table 27. Arithmetic Unit Control (auc) Register
Bit
8
7
6
5
4
3
2
1
0
Field
RAND
X=Y=
CLR
SAT
ALIGN
Field
Value
Description
RAND
0
1
Pseudorandom sequence generator (PSG) reset by writing the pi
register only outside an interrupt service routine.
PSG never reset by writing the pi register.
X=Y=
0
1
Normal operation.
All instructions which load the high half of the y register also load
the x register, allowing single-cycle squaring with p = x * y.
CLR
1xx
Clearing yl is disabled (enabled when 0).
x1x
Clearing a1l is disabled (enabled when 0).
xx1
Clearing a0l is disabled (enabled when 0).
SAT
1x
a1 saturation on overflow is disabled (enabled when 0).
x1
a0 saturation on overflow is disabled (enabled when 0).
ALIGN
00
a0, a1
p.
01
a0, a1
p/4.
10
a0, a1
p x 4 (and zeros written to the two LSBs).
11
a0, a1
p x 2 (and zero written to the LSB).
Data Sheet
DSP1629 Digital Signal Processor
January 2002
50
Agere Systems Inc.
5 Software Architecture
(continued)
*
JINT is a JTAG interrupt and is controlled by the HDS. It may be made unmaskable by the Agere Systems development system tools.
Encoding: a 0 disables an interrupt; a 1 enables an interrupt.
Encoding: a 0 indicates no interrupt. A 1 indicates an interrupt has been recognized and is pending or being ser-
viced. If a 1 is written to bits 4, 5, or 8 of ins, the corresponding interrupt is cleared.
Table 28. Parallel Host Interface Control (phifc) Register
Bit
15--7
6
5
4
3
2
1
0
Field
RSVD
PSOBEF
PFLAGSEL
PFLAG
PBSELF
PSTRB
PSTROBE
PMODE
Field
Value
Description
PMODE
0
1
8-bit data transfers.
16-bit data transfers.
PSTROBE
0
1
Intel
protocol: PIDS and PODS data strobes.
Motorola
protocol: PRWN and PDS data strobes.
PSTRB
0
1
When PSTROBE = 1, PODS pin (PDS) active-low.
When PSTROBE = 1, PODS pin (PDS) active-high.
PBSELF
0
1
In either mode, PBSEL pin = 0
pdx0 low byte. See Table 7, PHIF Func-
tion (8-bit and 16-bit Modes).
If PMODE = 0, PBSEL pin = 1
pdx0 low byte.
If PMODE = 1, PBSEL pin = 0
pdx0 high byte.
PFLAG
0
1
PIBF and POBE pins active-high.
PIBF and POBE pins active-low.
PFLAGSEL
0
1
Normal.
PIBF flag ORed with POBE flag and output on PIBF pin; POBE pin un-
changed (output buffer empty).
PSOBEF
0
1
Normal.
POBE flag as read through PSTAT register is active-low.
Table 29. Interrupt Control (inc) Register
Bit
15
14--11
10
9
8
7--6
5--4
3
2
1
0
Field
JINT*
RSVD
OBE2
IBF2
TIME
RSVD
INT[1:0]
PIBF
POBE
OBE
IBF
Table 30. Interrupt Status (ins) Register
Bit
15
14--11
10
9
8
7--6
5--4
3
2
1
0
Field
JINT
RSVD
OBE2
IBF2
TIME
RSVD
INT[1:0]
PIBF
POBE
OBE
IBF
Data Sheet
January 2002
DSP1629 Digital Signal Processor
Agere Systems Inc.
51
5 Software Architecture
(continued)
Table 31. timerc Register
Bit
15--7
6
5
4
3--0
Field
RSVD
DISABLE
RELOAD
T0EN
PRESCALE
Field
Value
Description
DISABLE
0
1
Timer enabled.
Timer and prescaler disabled. The period register and timer0 are not reset.
RELOAD
0
1
Timer stops after counting down to 0.
Timer automatically reloads and repeats indefinitely.
T0EN
0
1
Timer holds current count.
Timer counts down to 0.
PRESCALE
--
See the PRESCALE Field table.
PRESCALE Field
PRESCALE
Frequency of
Timer Interrupts
PRESCALE
Frequency of
Timer Interrupts
0000
CKO/2
1000
CKO/512
0001
CKO/4
1001
CKO/1024
0010
CKO/8
1010
CKO/2048
0011
CKO/16
1011
CKO/4096
0100
CKO/32
1100
CKO/8192
0101
CKO/64
1101
CKO/16384
0110
CKO/128
1110
CKO/32768
0111
CKO/256
1111
CKO/65536
Table 32. Phase-Locked Loop Control (pllc) Register
Bit
15
14
13
12
11--8
7--5
4--0
Field
PLLEN
PLLSEL
ICP
RSVD
LF[3:0]
Nbits[2:0]
Mbits[4:0]
Field
Value
Description
PLLEN
0
1
PLL powered down.
PLL powered up.
PLLSEL
0
1
DSP internal clock taken directly from CKI.
DSP internal clock taken from PLL.
ICP
--
Charge pump current selection (see Table 64, PLL Electrical Specifications and pllc Reg-
ister Settings for proper value).
RSVD
0
--
LF[3:0]
--
Loop filter setting (see Table 64, PLL Electrical Specifications and pllc Register Settings
for proper value).
Nbits[2:0]
--
Encodes N, 1
N
8, where N = Nbits[2:0] + 2, unless Nbits[2:0] = 111, then N = 1.
Mbits[4:0]
--
Encodes M, 2
M
20, where M = Mbits[4:0] + 2, f
INTERNAL CLOCK
= f
CKI
x (M/(2N)).
Data Sheet
DSP1629 Digital Signal Processor
January 2002
52
Agere Systems Inc.
5 Software Architecture
(continued)
Table 33. sbit Register
Bit
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Field
DIREC[7:0]
VALUE[7:0]
Field
Value
Description
DIREC
1xxxxxxx
IOBIT7 is an output (input when 0).
x1xxxxxx
IOBIT6 is an output (input when 0).
xx1xxxxx
IOBIT5 is an output (input when 0).
xxx1xxxx
IOBIT4 is an output (input when 0).
xxxx1xxx
IOBIT3 is an output (input when 0).
xxxxx1xx
IOBIT2 is an output (input when 0).
xxxxxx1x
IOBIT1 is an output (input when 0).
xxxxxxx1
IOBIT0 is an output (input when 0).
VALUE
Rxxxxxxx
Reads the current value of IOBIT7.
xRxxxxxx
Reads the current value of IOBIT6.
xxRxxxxx
Reads the current value of IOBIT5.
xxxRxxxx
Reads the current value of IOBIT4.
xxxxRxxx
Reads the current value of IOBIT3.
xxxxxRxx
Reads the current value of IOBIT2.
xxxxxxRx
Reads the current value of IOBIT1.
xxxxxxxR
Reads the current value of IOBIT0.
Table 34. cbit Register
Bit
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Field
MODE/MASK[7:4]
MODE/MASK[3:0]
DATA/PAT[7:4]
DATA/PAT[3:0]
DIREC[n]
*
* 0
n
7.
MODE/MASK[n]
DATA/PAT[n]
Action
1 (Output)
0
0
Clear
1 (Output)
0
1
Set
1 (Output)
1
0
No Change
1 (Output)
1
1
Toggle
0 (Input)
0
0
No Test
0 (Input)
0
1
No Test
0 (Input)
1
0
Test for Zero
0 (Input)
1
1
Test for One
Data Sheet
January 2002
DSP1629 Digital Signal Processor
Agere Systems Inc.
53
5 Software Architecture
(continued)
If the EXM pin is high and the INT1 is low upon reset, the mwait register is initialized to all 1s (15 wait-states for all
external memory). Otherwise, the mwait register is initialized to all 0s (0 wait-states) upon reset.
Table 35. alf Register
Bit
15
14
13--0
Field
AWAIT
LOWPR
FLAGS
Field
Value
Action
AWAIT
1
0
Power-saving standby mode or standard sleep enabled.
Normal operation.
LOWPR
1
0
The internal DPRAM is addressed beginning at 0x0000 in X space.
The internal DPRAM is addressed beginning at 0xc000 in X space.
FLAGS
--
See the following table.
Bit
Flag
Use
13--8
Reserved
--
7
nmns1
NOT-MINUS-ONE from BMU
6
mns1
MINUS-ONE from BMU
5
evenp
EVEN PARITY from BMU
4
oddp
ODD PARITY from BMU
3
somef
SOME FALSE from BIO
2
somet
SOME TRUE from BIO
1
allf
ALL FALSE from BIO
0
allt
ALL TRUE from BIO
Table 36. mwait Register
Bit
15--12
11--8
7--4
3--0
Field
EROM[3:0]
ERAMHI[3:0]
IO[3:0]
ERAMLO[3:0]
Table 37. DSP1629 32-Bit JTAG ID Register
Bit
31
30
29--28
27--19
18--12
11--0
Field
RSVD
SECURE
CLOCK
ROMCODE
PART ID
0x03B
Field
Value
Mask-Programmable Features
RSVD
0
--
SECURE
0
1
Nonsecure ROM option.
Secure ROM option.
CLOCK
01
11
Small-signal input clock option.
CMOS level input clock option.
ROMCODE
--
Users ROMCODE ID:
The ROMCODE ID is the 9-bit binary value of the following expression:
(20 x value for first letter) + (value of second letter), where the values of the let-
ters are in the following table. For example, ROMCODE GK is (20 x 6) + (9) = 129
or 0 1000 0001.
PART ID
0x29
DSP1629.
ROMCODE Letter
A
B
C
D
E
F
G
H
J
K
L
M
N
P
R
S
T
U
W
Y
Value
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
Data Sheet
DSP1629 Digital Signal Processor
January 2002
54
Agere Systems Inc.
5 Software Architecture
(continued)
Table 38. ioc Register
*
* The field definitions for the ioc register are different from the DSP1610.
Bit
15
14
13
12
11
10
9
8--7
6--4
3--0
Field
RSVD
EXTROM CKO2 EBIOH
WEROM
ESIO2
SIOLBC
CKO[1:0]
RSVD
DENB[3:0]
ioc Fields
ioc Field
Description
EXTROM
If 1, sets AB15 low during external memory accesses when WEROM = 1.
CKO2
CKO configuration (see the following table).
EBIOH
If 1, enables the high half of BIO, IOBIT[4:7], and disables VEC[3:0] from pins.
WEROM
If 1, allows writing into external program (X) memory.
ESIO2
If 1, enables SIO2 and low half of BIO, and disables PHIF from pins.
SIOLBC
If 1, DO1 and DO2 looped back to DI1 and DI2.
CKO[1:0]
CKO configuration (see the following table).
DENB3
If 1, delay EROM.
DENB2
If 1, delay ERAMHI.
DENB1
If 1, delay IO.
DENB0
If 1, delay ERAMLO.
CKO2
CKO1
CKO0
CKO Output
Description
--
--
--
1X
PLL
--
0
0
0
CKI
CKI x M/(2N)
Free-running clock.
*
,
* The phase of CKI is synchronized by the rising edge of RSTB.
When SLOWCKI is enabled in the powerc register, these options reflect the low-speed internal ring oscillator.
0
0
1
CKI/(1 + W)
CKI x (M/(2N))/[1 + W]
Wait-stated clock.
*
,
,
The wait-stated clock reflects the internal instruction cycle and may be stretched based on the mwait register setting (see Table 36, mwait
Register). During sequenced external memory accesses, it completes one cycle.
0
1
0
1
1
Held high.
0
1
1
0
0
Held low.
1
0
0
CKI
CKI
Output of CKI buffer.
1
0
1
CKI/(1 + W)
CKI x (M/(2N))/[1 + W]
Sequenced, wait-stated clock.*,
,
,
**
** The sequenced wait-stated clock completes two cycles during a sequenced external memory access and may be stretched based on the mwait
register setting (see Table 36, mwait Register).
1
1
0
Reserved.
1
1
1
Reserved.
Data Sheet
January 2002
DSP1629 Digital Signal Processor
Agere Systems Inc.
55
5 Software Architecture
(continued)
Table 39. powerc Register
Note: The reserved (RSVD) bits should always be written with zeros to make the program compatible with future chip versions.
A
indicates that this bit is unknown on powerup reset and unaffected on subsequent reset. An S indicates that this
bit shadows the PC. P indicates the value on an input pin, i.e., the bit in the register reflects the value on the corre-
sponding input pin.
If EXM is high and INT1 is low when RSTB goes high, mwait will contain all ones instead of all zeros.
The powerc register configures various power management modes.
Bit
15
14
13
12
11
10
9--8
7
6
5
4
3--0
Field XTLOFF SLOWCKI NOCK INT0EN RSVD INT1EN RSVD SIO1DIS SIO2DIS PHIFDIS TIMERDIS RSVD
powerc fields
Field
Description
XTLOFF
1 = powerdown small-signal clock input.
SLOWCKI
1 = select ring oscillator clock (internal slow clock).
NOCK
1 = disable internal processor clock.
INT0EN
1 = INT0 clears NOCK field.
INT1EN
1 = INT1 clears NOCK field.
SIO1DIS
1 = disable SIO1.
SIO2DIS
1 = disable SIO2.
PHIFDIS
1 = disable PHIF.
TIMERDIS
1 = disable timer.
Table 40. Register Settings After Reset
Register
Bits 15--0
Register
Bits 15--0
r0
ybase
r1
inc
0000000000000000
r2
ins
0000010000000110
r3
sdx2
j
saddx
k
cloop
000000000
rb
0000000000000000
mwait
0000000000000000
re
0000000000000000
saddx2
pt
sioc2
0000000000
pr
cbit
pi
SSSSSSSSSSSSSSSS
sbit
00000000PPPPPPPP
i
ioc
0000000000000000
p
jtag
pl
a0
x
a0l
y
a1
yl
a1l
auc
0000000000000000
timerc
00000000
psw
00
timer0
0000000000000000
c0
tdms2
0000000000
c1
srta2
c2
powerc
0000000000000000
sioc
0000000000
pllc
0000000000000000
srta
ar0
sdx
ar1
tdms
0000000000
ar2
phifc
0000000000000000
ar3
pdx0
0000000000000000
alf
00000000
Data Sheet
DSP1629 Digital Signal Processor
January 2002
56
Agere Systems Inc.
5 Software Architecture
(continued)
5.3 Instruction Set Formats
This section defines the hardware-level encoding of the DSP1629 device instructions.
Multiply/ALU Instructions
Special Function Instructions
Format 1: Multiply/ALU Read/Write Group
Field
T
D
S
F1
X
Y
Bit
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Format 1a: Multiply/ALU Read/Write Group
Field
T
aT
S
F1
X
Y
Bit
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Format 2: Multiply/ALU Read/Write Group
Field
T
D
S
F1
X
Y
Bit
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Format 2a: Multiply/ALU Read/Write Group
Field
T
aT
S
F1
X
Y
Bit
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Format 3: F2 ALU Special Functions
Field
T
D
S
F2
CON
Bit
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Format 3a: F3 ALU Operations
Field
T
D
S
F3
SRC2
aT
0
1
Immediate Operand (IM16)
Bit
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Format 3b: BMU Operations
Field
T
D
S
F4[3--1]
0
F4[0]
AR
Immediate Operand (IM16)
Bit
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Data Sheet
January 2002
DSP1629 Digital Signal Processor
Agere Systems Inc.
57
5 Software Architecture
(continued)
Control Instructions
Data Move Instructions
Cache Instructions
Format 4: Branch Direct Group
Field
T
JA
Bit
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Format 5: Branch Indirect Group
Field
T
B
Reserved
0
Bit
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Format 6: Conditional Branch Qualifier/Software Interrupt (icall)
Note that a branch instruction immediately follows except for a software interrupt (icall).
Field
T
SI
Reserved
CON
Bit
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Format 7: Data Move Group
Field
T
aT
R
Y/Z
Bit
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Format 8: Data Move (immediate operand--2 words)
Field
T
D
R
Reserved
Immediate Operand (IM16)
Bit
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Format 9: Short Immediate Group
Field
T
I
Short Immediate Operand (IM9)
Bit
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Format 9a: Direct Addressing
Field
T
R/W
DR
1
OFFSET
Bit
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Format 10: Do/Redo
Field
T
N
K
Bit
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Data Sheet
DSP1629 Digital Signal Processor
January 2002
58
Agere Systems Inc.
5 Software Architecture
(continued)
Field Descriptions
Table 41. T Field
Table 42. D Field
Table 43.
aT
Field
Table 44. S Field
Table 45. F1 Field
Table 46. X Field
Specifies the type of instruction.
T
Operation
Format
0000x
goto JA
4
00010
Short imm j, k, rb, re
9
00011
Short imm r0, r1, r2, r3
9
00100
Y = a1[l]
F1
1
00101
Z:aT[l]
F1
2a
00110
Y
F1
1
00111
aT[l] = Y
F1
1a
01000
Bit 0 = 0, aT = R
7
01000
Bit 0 = 1, aTl = R
7
01001
Bit 10 = 0, R = a0
7
01001
Bit 10 = 1, R = a0l
7
01010
R = IM16
8
01011
Bit 10 = 0, R = a1
7
01011
Bit 10 = 1, R = a1l
7
01100
Y = R
7
01101
Z:R
7
01110
do, redo
10
01111
R = Y
7
1000x
call JA
4
10010
ifc CON
F2
3
10011
if CON
F2
3
10100
Y = y[l]
F1
1
10101
Z:y[l]
F1
2
10110
x = Y
F1
1
10111
y[l] = Y
F1
1
11000
Bit 0 = 0, branch indirect
5
11000
Bit 0 = 1, F3 ALU
3a
11001
y = a0 x = X
F1
1
11010
Conditional branch qualifier
6
11011
y = a1 x = X
F1
1
11100
Y = a0[l]
F1
1
11101
Z:y x = X
F1
2
11110
Bit 5 = 0, F4 ALU (BMU)
3b
11110
Bit 5 = 1, direct addressing
9a
11111
y = Y x = X
F1
1
Specifies a destination accumulator.
D
Register
0
Accumulator 0
1
Accumulator 1
Specifies transfer accumulator.
aT
Register
0
Accumulator 1
1
Accumulator 0
Specifies a source accumulator.
S
Register
0
Accumulator 0
1
Accumulator 1
Specifies the multiply/ALU function.
F1
Operation
0000
aD = pp = x * y
0001
aD = aS + pp = x * y
0010
p = x *
y
0011
aD = aS pp = x * y
0100
aD = p
0101
aD = aS + p
0110
nop
0111
aD = aS p
1000
aD = aS | y
1001
aD = aS ^ y
1010
aS & y
1011
aS y
1100
aD = y
1101
aD = aS + y
1110
aD = aS & y
1111
aD = aS y
Specifies the addressing of ROM data in two-operand
multiply/ALU instructions. Specifies the high or low half
of an accumulator, or the y register in one-operand mul-
tiply/ALU instructions.
X
Operation
Two-Operand Multiply/ALU
0
*
pt++
1
*
pt++i
One-Operand Multiply/ALU
0
aTl, yl
1
aTh, yh
Data Sheet
January 2002
DSP1629 Digital Signal Processor
Agere Systems Inc.
59
5 Software Architecture
(continued)
Table 47. Y Field
Table 48. Z Field
Table 49. F2 Field
Table 50. CON Field
Specifies the form of register indirect addressing with
postmodification.
Y
Operation
0000
*r0
0001
*r0++
0010
*r0--
0011
*r0++j
0100
*r1
0101
*r1++
0110
*r1--
0111
*r1++j
1000
*r2
1001
*r2++
1010
*r2--
1011
*r2++j
1100
*r3
1101
*r3++
1110
*r3--
1111
*r3++j
Specifies the form of register indirect compound ad-
dressing with postmodification.
Z
Operation
0000
*
r0zp
0001
*
r0pz
0010
*
r0m2
0011
*
r0jk
0100
*
r1zp
0101
*
r1pz
0110
*
r1m2
0111
*
r1jk
1000
*
r2zp
1001
*
r2pz
1010
*
r2m2
1011
*
r2jk
1100
*
r3zp
1101
*
r3pz
1110
*
r3m2
1111
*
r3jk
Specifies the special function to be performed.
F2
Operation
0000
aD = aS >> 1
0001
aD = aS << 1
0010
aD = aS >> 4
0011
aD = aS << 4
0100
aD = aS >> 8
0101
aD = aS << 8
0110
aD = aS >> 16
0111
aD = aS << 16
1000
aD = p
1001
aDh = aSh + 1
1010
aD = ~aS
1011
aD = rnd(aS)
1100
aD = y
1101
aD = aS + 1
1110
aD = aS
1111
aD = aS
Specifies the condition for special functions and condi-
tional control instructions.
CON
Condition
CON
Condition
00000
mi
01110
true
00001
pl
01111
false
00010
eq
10000
gt
00011
ne
10001
le
00100
lvs
10010
allt
00101
lvc
10011
allf
00110
mvs
10100
somet
00111
mvc
10101
somef
01000
heads
10110
oddp
01001
tails
10111
evenp
01010
c0ge
11000
mns1
01011
c0lt
11001
nmns1
01100
c1ge
11010
npint
01101
c1lt
11011
njint
11100
lock
Other
codes
Reserved
--
--
Data Sheet
DSP1629 Digital Signal Processor
January 2002
60
Agere Systems Inc.
5 Software Architecture
(continued)
Table 51. R Field
Table 52. B Field
Table 54. I Field
Table 55. SI Field
Specifies the register for data move instructions.
R
Register
R
Register
000000
r0
100000
inc
000001
r1
100001
ins
000010
r2
100010
sdx2
000011
r3
100011
saddx
000100
j
100100
cloop
000101
k
100101
mwait
000110
rb
100110
saddx2
000111
re
100111
sioc2
001000
pt
101000
cbit
001001
pr
101001
sbit
001010
pi
101010
ioc
001011
i
101011
jtag
001100
p
101100
Reserved
001101
pl
101101
Reserved
001110
pllc
101110
Reserved
001111
Reserved
101111
Reserved
010000
x
110000
a0
010001
y
110001
a0l
010010
yl
110010
a1
010011
auc
110011
a1l
010100
psw
110100
timerc
010101
c0
110101
timer0
010110
c1
110110
tdms2
010111
c2
110111
srta2
011000
sioc
111000
powerc
011001
srta
111001
Reserved
011010
sdx
111010
ar0
011011
tdms
111011
ar1
011100
phifc
111100
ar2
011101
pdx0
111101
ar3
011110
Reserved
111110
Reserved
011111
ybase
111111
alf
Specifies the type of branch instruction (except software
interrupt).
B
Operation
000
return
001
ireturn
010
goto pt
011
call pt
1xx
Reserved
Table 53. DR Field
DR Value
Register
0000
r0
0001
r1
0010
r2
0011
r3
0100
a0
0101
a0l
0110
a1
0111
a1l
1000
y
1001
yl
1010
p
1011
pl
1100
x
1101
pt
1110
pr
1111
psw
Specifies a register for short immediate data move in-
structions.
I
Register
00
r0/j
01
r1/k
10
r2/rb
11
r3/re
Specifies when the conditional branch qualifier instruc-
tion should be interpreted as a software interrupt in-
struction.
SI
Operation
0
Not a software interrupt
1
Software interrupt
Data Sheet
January 2002
DSP1629 Digital Signal Processor
Agere Systems Inc.
61
5 Software Architecture
(continued)
N Field
Number of instructions to be loaded into the cache. Zero
implies redo operation.
K Field
Number of times the N instructions in cache are to be
executed. Zero specifies use of value in cloop register.
JA Field
12-bit jump address.
R/W Field
A zero specifies a write, *(O) = DR.
A one specifies a read, DR = *(O).
Table 56. F3 Field
Table 57. SRC2 Field
Note: xx encodes the auxiliary register to be used; 00 (ar0), 01(ar1),
10 (ar2), or 11(ar3).
Specifies the operation in an F3 ALU instruction.
F3
Operation
1000
aD = aS[h, l]
|
{aT, IM16, p}
1001
aD = aS[h, l]
^
{aT, IM16, p}
1010
aS[h, l]
&
{aT, IM16, p}
1011
aS[h, l]
{aT, IM16, p}
1101
aD = aS[h, l]
+
{aT, IM16, p}
1110
aD = aS[h, l]
&
{aT, IM16, p}
1111
aD = aS[h, l]
{aT, IM16, p}
Specifies operands in an F3 ALU instruction.
SRC2
Operands
00
aSl, IM16
10
aSh, IM16
01
aS, aT
11
aS, p
Table 58. BMU Encodings
F4
AR
Operation
0000
00xx
aD = aS >> arM
0001
00xx
aD = aS << arM
0000
10xx
aD = aS >>> arM
0001
10xx
aD = aS <<< arM
1000
0000
aD = aS >> aS
1001
0000
aD = aS << aS
1000
1000
aD = aS >>> aS
1001
1000
aD = aS <<< aS
1100
0000
aD = aS >> IM16
1101
0000
aD = aS << IM16
1100
1000
aD = aS >>> IM16
1101
1000
aD = aS <<< IM16
0000
1100
aD = exp(aS)
0001
11xx
aD = norm(aS, arM)
1110
0000
aD = extracts(aS, IM16)
0010
00xx
aD = extracts(aS, arM)
1110
0100
aD = extractz(aS, IM16)
0010
01xx
aD = extractz(aS, arM)
1110
1000
aD = insert(aS, IM16)
1010
10xx
aD = insert(aS, arM)
0111
0000
aD = aS:aa0
0111
0001
aD = aS:aa1
Data Sheet
DSP1629 Digital Signal Processor
January 2002
62
Agere Systems Inc.
6 Signal Descriptions
Figure 9. DSP1629 Pinout by Interface
EXTERNAL
MEMORY
INTERFACE
IO
ERAMHI
EROM
EXM
AB[15:0]
DB[15:0]
RWN
SYSTEM
INTERFACE
OR
CONTROL I/O
INTERFACE
OBE1
OLD1
OCK1
DO1
TDI
TDO
TCK
TMS
PODS OR OLD2
PSTAT OR DO2
PCSN OR OCK2
POBE OR OBE2
PBSEL OR SYNC2
PB2 OR DOEN2
PIBF OR IBF2
PIDS OR ILD2
PB0 OR ICK2
PB1 OR DI2
PB3 OR SADD2
PB[7:4] OR IOBIT[3:O]
DSP1629
RSTB
CKO
IACK
STOP
CKI2
VEC[3:0] OR IOBIT[4:7]
INT[1:0]
PARALLEL HOST
INTERFACE
OR
SERIAL INTERFACE #2
AND CONTROL I/O
INTERFACE
ILD1
DI1
TRAP
SERIAL
INTERFACE #1
ICK1
IBF1
SYNC1
ERAMLO
SADD1
DOEN1
JTAG TEST
INTERFACE
2
4
16
16
4
CKI
TRST
DSEL
5-4006 (F).i
Figure 9, DSP1629 Pinout by Interface, shows the pi-
nout for the DSP1629. The signals can be separated
into five interfaces, as shown. These interfaces and the
signals that comprise them are described in Section 6.1,
System Interface.
6.1 System Interface
The system interface consists of the clock, interrupt,
and reset signals for the processor.
RSTB
Reset: Negative assertion. A high-to-low transition
causes the processor to enter the reset state. The auc,
powerc, sioc, sioc2, phifc, pdx0, tdms, tdms2, timerc,
timer0, sbit (upper byte), inc, ins (except OBE, OBE2,
and PODS status bits set), alf (upper 2 bits, AWAIT and
LOWPR), ioc, rb, and re registers are cleared. The
mwait register is initialized to all 0s (zero wait-states)
unless the EXM pin is high and the INT1 pin is low. In
that case, the mwait register is initialized to all 1s
(15 wait-states).
Reset clears IACK, VEC[3:0]/IOBIT[4:7], IBF, and IBF2.
The DAU condition flags are not affected by reset.
IOBIT[7:0] are initialized as inputs. If any of the IOBIT
pins are switched to outputs (by writing sbit), their initial
value will be logic zero (see Table 40, Register Settings
After Reset).
Upon negation of the signal, the processor begins exe-
cution at location 0x0000 in the active memory map
(see Section 4.4, Memory Maps and Wait-States).
Data Sheet
January 2002
DSP1629 Digital Signal Processor
Agere Systems Inc.
63
6 Signal Descriptions
(continued)
CKI
Input Clock: A mask-programmable option selects one
of three possible input buffers for the CKI pin (see Sec-
tion 7, Mask-Programmable Options, and Table 1, Pin
Descriptions). The internal CKI from the output of the
selected input buffer can then drive the internal proces-
sor clock directly (1X) or drive the on-chip PLL (see Sec-
tion 4.13, Power Management). The PLL allows the CKI
input clock to be at a lower frequency than the internal
processor clock.
CKI2
Input Clock 2: Used with mask-programmable input
clock options which require an external small signal dif-
ferential across CKI and CKI2 (see Table 1, Pin De-
scriptions). When the CMOS option is selected, this pin
should be tied to V
SSA
.
STOP
Stop Input Clock: Negative assertion. A high-to-low
transition synchronously stops all of the internal proces-
sor clocks, leaving the processor in a defined state. Re-
turning the pin high will synchronously restart the
processor clocks to continue program execution from
where it left off, without any loss of state. This hardware
feature has the same effect as setting the NOCK bit in
the powerc register (see Table 39, powerc Register).
CKO
Clock Out: Buffered output clock with options program-
mable via the ioc register (see Table 38, ioc Register).
The selectable CKO options (see Table 38, ioc Register
and Table 29, Interrupt Control (inc) Register) are as fol-
lows:
s
A free-running output clock at the frequency of the in-
ternal processor clock; runs at the internal ring oscil-
lator frequency when SLOWCKI is enabled.
s
A wait-stated clock based on the internal instruction
cycle; runs at the internal ring oscillator frequency
when SLOWCKI is enabled.
s
A sequenced, wait-stated clock based on the EMI se-
quencer cycle; runs at the internal ring oscillator fre-
quency when SLOWCKI is enabled.
s
A free-running output clock that runs at the CKI rate,
independent of the powerc register setting. This op-
tion is only available with the small-signal clock op-
tions. When the PLL is selected, the CKO frequency
equals the input CKI frequency, regardless of how the
PLL is programmed.
s
A logic 0.
s
A logic 1.
INT[1:0]
Processor Interrupts 0 and 1: Positive assertion.
Hardware interrupt inputs to the DSP1629. Each is en-
abled via the inc register. When enabled and asserted,
each cause the processor to vector to the memory loca-
tion described in Table 4, Interrupt Vector Table. INT1
is used in conjunction with EXM to select the desired re-
set initialization of the mwait register (see Table 36,
mwait Register). When both INT0 and RSTB are assert-
ed, all output and bidirectional pins (except TDO, which
3-states by JTAG control) are put in a 3-state condition.
VEC[3:0]
Interrupt Output Vector: These four pins indicate
which interrupt is currently being serviced by the device.
Table 4, Interrupt Vector Table, shows the code associ-
ated with each interrupt condition. VEC[3:0] are multi-
plexed with IOBIT[4:7].
IACK
Interrupt Acknowledge: Positive assertion. IACK
signals when an interrupt is being serviced by the
DSP1629. IACK remains asserted while in an interrupt
service routine, and is cleared when the ireturn instruc-
tion is executed.
TRAP
Trap Signal: Positive assertion. When asserted, the
processor is put into the trap condition, which normally
causes a branch to the location 0x0046. The hardware
development system (HDS) can configure the trap pin
to cause an HDS trap, which causes a branch to loca-
tion 0x0003. Although normally an input, the pin can be
configured as an output by the HDS. As an output, the
pin can be used to signal an HDS breakpoint in a multi-
ple processor environment.
Data Sheet
DSP1629 Digital Signal Processor
January 2002
64
Agere Systems Inc.
6 Signal Descriptions
(continued)
6.2 External Memory Interface
The external memory interface is used to interface the
DSP1629 to external memory and I/O devices. It sup-
ports read/write operations from/to program and data
memory spaces. The interface supports four external
memory segments. Each external memory segment
can have an independent number of software-program-
mable wait-states. One hardware address is decoded,
and an enable line is provided, to allow glueless I/O in-
terfacing.
AB[15:0]
External Memory Address Bus: Output only. This
16-bit bus supplies the address for read or write opera-
tions to the external memory or I/O. During external
memory accesses, AB[15:0] retain the value of the last
valid external access.
DB[15:0]
External Memory Data Bus: This 16-bit bidirectional
data bus is used for read or write operations to the ex-
ternal memory or I/O.
RWN
Read/Write Not: When a logic 1, the pin indicates that
the memory access is a read operation. When a logic 0,
the memory access is a write operation.
EXM
External Memory Select: Input only. This signal is
latched into the device on the rising edge of RSTB. The
value of EXM latched in determines whether the internal
ROM is addressable in the instruction/coefficient mem-
ory map. If EXM is low, internal ROM is addressable. If
EXM is high, only external ROM is addressable in the
instruction/coefficient memory map (see Table 5, In-
struction/Coefficient Memory Maps). EXM chooses be-
tween MAP1 or MAP2 and between MAP3 or MAP4.
EROM
External ROM Enable Signal: Negative assertion.
When asserted, the signal indicates an access to exter-
nal program memory (see Table 5, Instruction/Coeffi-
cient Memory Maps). This signal's leading edge can be
delayed via the ioc register (see Table 38, ioc Register).
ERAMHI
External RAM High Enable Signal: Negative asser-
tion. When asserted, the signal indicates an access to
external data memory addresses 0x8000 through
0xFFFF (see Table 6, Data Memory Maps). This sig-
nal's leading edge can be delayed via the ioc register
(see Table 38, ioc Register).
ERAMLO
External RAM Low Enable Signal: Negative asser-
tion. When asserted, the signal indicates an access to
external data memory addresses 0x4100 through
0x7FFF (see Table 6, Data Memory Maps). This sig-
nal's leading edge can be delayed via the ioc register
(see Table 38, ioc Register).
I/O
External I/O Enable Signal: Negative assertion. When
asserted, the signal indicates an access to external data
memory addresses 0x4000 through 0x40FF (see
Table 6, Data Memory Maps). This memory segment is
intended for memory-mapped I/O. This signal's leading
edge can be delayed via the ioc register (see Table 38,
ioc Register).
Data Sheet
January 2002
DSP1629 Digital Signal Processor
Agere Systems Inc.
65
6 Signal Descriptions
(continued)
6.3 Serial Interface #1
The serial interface pins implement a full-featured syn-
chronous/asynchronous serial I/O channel. In addition,
several pins offer a glueless TDM interface for multipro-
cessing communication applications (see Figure 6, Mul-
tiprocessor Communication and Connections).
DI1
Data Input: Serial data is latched on the rising edge of
ICK1, either LSB or MSB first, according to the sioc reg-
ister MSB field (see Table 22, Serial I/O Control Regis-
ters).
ICK1
Input Clock: The clock for serial input data. In active
mode, ICK1 is an output; in passive mode, ICK1 is an
input, according to the sioc register ICK field (see Table
22, Serial I/O Control Registers). Input typically has
0.7 V hysteresis.
ILD1
Input Load: The clock for loading the input buffer,
sdx[in], from the input shift register isr. A falling edge of
ILD1 indicates the beginning of a serial input word. In
active mode, ILD1 is an output; in passive mode, ILD1
is an input, according to the sioc register ILD field (see
Table 22, Serial I/O Control Registers). Input typically
has 0.7 V hysteresis.
IBF1
Input Buffer Full: Positive assertion. IBF1 is asserted
when the input buffer, sdx[in], is filled. IBF1 is negated
by a read of the buffer, as in a0 = sdx. IBF1 is also ne-
gated by asserting RSTB.
DO1
Data Output: The serial data output from the output
shift register (osr), either LSB or MSB first (according to
the sioc register MSB field). DO1 changes on the rising
edges of OCK1. DO1 is 3-stated when DOEN1 is high.
DOEN1
Data Output Enable: Negative assertion. An input
when not in the multiprocessor mode. DO1 and SADD1
are enabled only if DOEN1 is low. DOEN1 is bidirection-
al when in the multiprocessor mode (tdms register
MODE field set). In the multiprocessor mode, DOEN1
indicates a valid time slot for a serial output.
OCK1
Output Clock: The clock for serial output data. In active
mode, OCK1 is an output; in passive mode, OCK1 is an
input, according to the sioc register OCK field (see Ta-
ble 22, Serial I/O Control Registers). Input typically has
0.7 V hysteresis.
OLD1
Output Load: The clock for loading the output shift reg-
ister, osr, from the output buffer sdx[out]. A falling edge
of OLD1 indicates the beginning of a serial output word.
In active mode, OLD1 is an output; in passive, OLD1 is
an input, according to the sioc register OLD field (see
Table 22, Serial I/O Control Registers). Input typically
has 0.7 V hysteresis.
OBE1
Output Buffer Empty: Positive assertion. OBE1 is as-
serted when the output buffer, sdx[out], is emptied
(moved to the output shift register for transmission). It is
cleared with a write to the buffer, as in sdx = a0. OBE1
is also set by asserting RSTB.
SADD1
Serial Address: Negative assertion. A 16-bit serial bit
stream typically used for addressing during multiproces-
sor communication between multiple DSP16xx devices.
In multiprocessor mode, SADD1 is an output when the
tdms time slot dictates a serial transmission; otherwise,
it is an input. Both the source and destination DSP can
be identified in the transmission. SADD1 is always an
output when not in multiprocessor mode and can be
used as a second 16-bit serial output. See the
DSP1611/17/18/27/28/29 Digital Signal Processor
In-
formation Manual for additional information. SADD1 is
3-stated when DOEN1 is high. When used on a bus,
SADD1 should be pulled high through a 5 k
resistor.
SYNC1
Multiprocessor Synchronization: Typically used in
the multiprocessor mode, a falling edge of SYNC1 indi-
cates the first word (time slot 0) of a TDM I/O stream
and causes the resynchronization of the active ILD1
and OLD1 generators. SYNC1 is an output when the
tdms register SYNC field is set (i.e., selects the master
DSP and uses time slot 0 for transmit). As an input,
SYNC1 must be tied low unless part of a TDM interface.
When used as an output, SYNC1 = [ILD1/OLD1]/8 or
16, depending on the setting of the SYNCSP field of the
tdms register. When configured as described above,
SYNC1 can be used to generate a slow clock for SIO
operations. Input typically has 0.7 V hysteresis.
Data Sheet
DSP1629 Digital Signal Processor
January 2002
66
Agere Systems Inc.
6 Signal Descriptions
(continued)
6.4 Parallel Host Interface or Serial Interface
#2 and Control I/O Interface
This interface pin multiplexes a parallel host interface
with a second serial I/O interface and a 4-bit I/O inter-
face. The interface selection is made by writing the
ESIO2 bit in the ioc register (see Table 38, ioc Register
and Section 4.1, DSP1629 Architectural Overview). The
functions and signals for the second SIO correspond ex-
actly with those in SIO #1. Therefore, the following pin
descriptions discuss only PHIF and BIO pin functional-
ity.
PB[7:0]
Parallel I/O Data Bus: This 8-bit bidirectional bus is
used to input data to, or output data from, the PHIF.
Note that PB[3:0] are pin multiplexed with SIO2 func-
tionality, and PB[7:4] are pin multiplexed with BIO unit
pins IOBIT[3:0] (see Section 4.1, DSP1629 Architectur-
al Overview).
PCSN
Peripheral Chip Select Not: Negative assertion. PCSN
is an input. While PCSN is low, the data strobes PIDS
and PODS are enabled. While PCSN is high, the
DSP1629 ignores any activity on PIDS and PODS.
PBSEL
Peripheral Byte Select: An input pin, configurable in
software. Selects the high or low byte of pdx0 available
for host accesses.
PSTAT
Peripheral Status Select: PSTAT is an input. When a
logic 0, the PHIF will output the pdx0[out] register on the
PB bus. When a logic 1, the PHIF will output the con-
tents of the PSTAT register on PB[7:0].
PIDS
Parallel Input Data Strobe: An input pin, software con-
figurable to support both
Intel
and
Motorola
protocols.
In
Intel
mode: negative assertion. PIDS is pulled low by
an external device to indicate that data is available on
the PB bus. The DSP latches data on the PB bus on the
rising edge (low-to-high transition) of PIDS or PCSN,
whichever comes first.
In
Motorola
mode: PIDS/PRWN functions as a read/
write strobe. The external device sets PIDS/PRWN to a
logic 0 to indicate that data is available on the PB bus
(write operation by the external device). A logic 1 on
PIDS/PRWN indicates an external read operation by the
external device.
PODS
Parallel Output Data Strobe: An input pin, software
configurable to support both
Intel
and
Motorola
proto-
cols.
In
Intel
mode: negative assertion. When PODS is pulled
low by an external device, the DSP1629 places the con-
tents of the parallel output register, pdx0, onto the PB
bus.
In
Motorola
mode: software-configurable assertion lev-
el. The external device uses PODS/PDS as its data
strobe for both read and write operations.
PIBF
Parallel Input Buffer Full: An output pin with positive
assertion; configurable in software. This flag is cleared
after reset, indicating an empty input buffer pdx0[in].
PIBF is set immediately after the rising edge of PIDS or
PCSN, indicating that data has been latched into the
pdx0[in] register. When the DSP1629 reads the con-
tents of this register, emptying the buffer, the flag is
cleared.
Configured in software, PIBF may become the logical
OR of the PIBF and POBE flags.
POBE
Parallel Output Buffer Empty: An output pin with pos-
itive assertion; configurable in software. This flag is set
after reset, indicating an empty output buffer pdx0[out].
POBE is set immediately after the rising edge of PODS
or PCSN, indicating that the data in pdx0[out] has been
driven onto the PB bus. When the DSP1629 writes to
pdx0[out], filling the buffer, this flag is cleared.
6.5 Control I/O Interface
This interface is used for status and control operations
provided by the bit I/O unit of the DSP1629. It is pin mul-
tiplexed with the PHIF and VEC[3:0] pins (see Section
4.1, DSP1629 Architectural Overview). Setting the
ESIO2 and EBIOH bits in the ioc register provides a full
8-bit BIO interface at the associated pins.
IOBIT[7:0]
I/O Bits [7:0]: Each of these bits can be independently
configured as either an input or an output. As outputs,
they can be independently set, toggled, or cleared. As
inputs, they can be tested independently or in combina-
tions for various data patterns.
Data Sheet
January 2002
DSP1629 Digital Signal Processor
Agere Systems Inc.
67
6 Signal Descriptions
(continued)
6.6 JTAG Test Interface
The JTAG test interface has features that allow pro-
grams and data to be downloaded into the DSP via four
pins. This provides extensive test and diagnostic capa-
bility. In addition, internal circuitry allows the device to
be controlled through the JTAG port to provide on-chip
in-circuit emulation. Agere Systems provides hardware
and software tools to interface to the on-chip HDS via
the JTAG port.
Note: The DSP1629 provides all JTAG/
IEEE
1149.1
standard test capabilities, including boundary
scan. See the
DSP1611/17/18/27/28/29 Digital
Signal Processor
Information Manual for addi-
tional information on the JTAG test interface.
TDI
Test Data Input: JTAG serial input signal. All serial-
scanned data and instructions are input on this pin. This
pin has an internal pull-up resistor.
TDO
Test Data Output: JTAG serial output signal. Serial-
scanned data and status bits are output on this pin.
TMS
Test Mode Select: JTAG mode control signal that,
when combined with TCK, controls the scan operations.
This pin has an internal pull-up resistor.
TCK
Test Clock: JTAG serial shift clock. This signal clocks
all data into the port through TDI, and out of the port
through TDO, and controls the port by latching the TMS
signal inside the state-machine controller.
TRST
Test Reset: Negative assertion. JTAG test reset. When
asserted low, asynchronously resets JTAG TAP con-
troller. In an application environment, this pin must be
asserted prior to or concurrent with RSTB. This pin has
an internal pull-up resistor.
Data Sheet
DSP1629 Digital Signal Processor
January 2002
68
Agere Systems Inc.
7 Mask-Programmable Options
The DSP1629 contains a ROM that is mask-programmable. The selection of several programmable features is
made when a custom ROM is encoded. These features select the input clock options, the instruction/coefficient
memory map option, and the hardware emulation or ROM security option, as summarized in Table 59, DSP1629
ROM Options.
7.1 Input Clock Options
For all input options, the input clock CKI can run at some fraction of the internal clock frequency by setting the PLL
multiplication factors appropriately (see Section 4.12, Clock Synthesis). When the PLL is bypassed, the input clock
CKI frequency is the internal clock frequency.
7.2 Memory Map Options
The DSP1629 offers a DSP1629x16 or a DSP1629x10, where the difference is in the memory maps. The
DSP1629x16 contains 16 Kwords of internal RAM (DPRAM). The DSP1629x10 supports the use of only 10 Kwords
of DPRAM. See Section 4.4, Memory Maps and Wait-States, for further description.
7.3 ROM Security Options
The DSP1600 hardware development system (HDS) provides on-chip in-circuit emulation and requires that the re-
locatable HDS code be linked to the application code. This code's object file is called 1629hds.v
#
, where # is a
unique version identifier. Refer to the DSP1629-ST software tools release for more specific information. If on-chip,
in-circuit emulation is desired, a nonsecure ROM must be chosen. If ROM security is desired with the DSP1629, the
HDS cannot be used. To provide testing of the internal ROM contents on a secure ROM device, a cyclic redundancy
check (CRC) program is called by and linked with the user's source code. The CRC code resides in the first
4 Kwords of ROM.
See the
DSP1600 Support Tools
Manual for more detailed information.
Table 59. DSP1629 ROM Options
Features
Options
Comments
Input Clock
CMOS Level
Small Signal
2.7 V and 3 V.
2.7 V and 3 V.
Memory Map
DSP1629x16
DSP1629x10
16 Kwords DPRAM.
10 Kwords DPRAM.
ROM Security
Nonsecure
Secure
Specify and link 1629hds.v
#
*
,
allows emulation.
Specify and link crc16.v
#
,
no emulation capability.
* 1629hds.v
#
(# indicates the current version number) is the relocatable HDS object code. It uses approximately 140 words
and must reside in the first 4 Kwords of ROM.
crc16.v
#
is the cyclic redundancy check object code. It uses approximately 75 words and must reside in the first 4 Kwords
of ROM. See the
DSP1600 Support Tools
Manual
for detailed information.
Data Sheet
January 2002
DSP1629 Digital Signal Processor
Agere Systems Inc.
69
8 Device Characteristics
8.1 Absolute Maximum Ratings
Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are abso-
lute stress ratings only. Functional operation of the device is not implied at these or any other conditions in excess
of those given in the operational sections of the data sheet. Exposure to absolute maximum ratings for extended
periods can adversely affect device reliability.
External leads can be bonded and soldered safely at temperatures of up to 300
C. (TBD for 144-pin PBGA.)
Voltage Range on V
DD
with Respect to Ground Using Devices Designed
for 3 V Operation ..............................................................................................................................0.5 V to +4.6 V
Voltage Range on Any Pin ............................................................................................. V
SS
0.5 V to V
DD
+ 0.5 V
Power Dissipation................................................................................................................................................ 1 W
Ambient Temperature Range ......................................................................................................... 40
C to +85
C
Storage Temperature Range
....................................................................................................................
65
C to +150
C
8.2 Handling Precautions
All MOS devices must be handled with certain precautions to avoid damage due to the accumulation of static
charge. Although input protection circuitry has been incorporated into the devices to minimize the effect of this static
buildup, proper precautions should be taken to avoid exposure to electrostatic discharge during handling and mount-
ing. Agere Systems employs a human-body model for ESD-susceptibility testing. Since the failure voltage of elec-
tronic devices is dependent on the current, voltage, and hence, the resistance and capacitance, it is important that
standard values be employed to establish a reference by which to compare test data. Values of 100 pF and 1500
are the most common and are the values used in the Agere Systems human-body model test circuit. The breakdown
voltage for the DSP1629 is greater than 2000 V.
8.3 Recommended Operating Conditions
The ratio of the instruction cycle rate to the input clock frequency is 1:1 without the PLL (referred to as 1X operation),
and M/(2N) with the PLL selected (see Section 4.12, Clock Synthesis). Device speeds greater than 50 MIPS do not
support 1X
operation; use the PLL.
Table 60. Recommended Operating Conditions
Maximum
Instruction
Rate (MIPS)
Device
Speed
Input Clock
Package
Supply Voltage
V
DD
(V)
Ambient
Temperature T
A
(
C)
Min
Max
Min
Max
52
19.2 ns
CMOS, Small-signal
PBGA
BQFP
or TQFP
2.7
3.3
40
85
80
12.5 ns
CMOS, Small-signal
PBGA
BQFP
or TQFP
2.7
3.3
40
85
60
16.7 ns
CMOS, Small-signal
PBGA
BQFP
or TQFP
3.0
3.6
40
85
100
10 ns
CMOS, Small-signal
PBGA
BQFP
or TQFP
3.0
3.6
40
85
Data Sheet
DSP1629 Digital Signal Processor
January 2002
70
Agere Systems Inc.
8 Device Characteristics
(continued)
8.4 Package Thermal Considerations
The recommended operating temperature specified in Section 8.3, Recommended Operating Conditions, is based
on the maximum power, package type, and maximum junction temperature. The following equations describe the
relationship between these parameters. If the applications' maximum power is less than the worst-case value, this
relationship determines a higher maximum ambient temperature or the maximum temperature measured at top
dead center of the package.
T
A
= T
J
P x
JA
T
TDC
= T
J
P x
J-TDC
where T
A
is the still-air ambient temperature and T
TDC
is the temperature measured by a thermocouple at the top
dead center of the package.
Maximum Junction Temperature (T
J
) in 100-Pin BQFP ..................................................................................100
C
100-pin BQFP Maximum Thermal Resistance in Still-Air-Ambient (
JA
) ..................................................... 55
C/W
100-pin BQFP Maximum Thermal Resistance, Junction to Top Dead Center (
J-TDC
)............................... 12
C/W
Maximum Junction Temperature (T
J
) in 100-Pin TQFP ..................................................................................100
C
100-pin TQFP Maximum Thermal Resistance in Still-Air-Ambient (
JA
) ..................................................... 30
C/W
100-pin TQFP Maximum Thermal Resistance, Junction to Top Dead Center (
J-TDC
) ................................. 6
C/W
Maximum Junction Temperature (T
J
) in 144-Pin PBGA..................................................................................100
C
144-pin PBGA Maximum Thermal Resistance in Still-Air-Ambient (
JA
) .......................... TBD (estimated 30
C/W)
144-pin PBGA Maximum Thermal Resistance, Junction to Top Dead Center (
J-TDC
)..................................... TBD
WARNING: Due to package thermal constraints, proper precautions in the user's application should be tak-
en to avoid exceeding the maximum junction temperature of 100
C. Otherwise, the device will
be affected adversely.
Data Sheet
January 2002
DSP1629 Digital Signal Processor
Agere Systems Inc.
71
9 Electrical Characteristics and Requirements
The following electrical characteristics are preliminary and are subject to change. Electrical characteristics refer to the
behavior of the device under specified conditions. Electrical requirements refer to conditions imposed on the user for
proper operation of the device. The parameters in Table 61, Electrical Characteristics and Requirements, are valid for
the conditions described in Section 8.3, Recommended Operating Conditions.
The small-signal buffer must be used in single-ended mode where an ac waveform (sine or square) is applied to CKI and a dc voltage approx-
imately equal to the average value of CKI is applied to CKI2, as shown in the following figure. The maximum allowable ripple on CKI2 is 100 mV.
Duty cycle for a sine wave is defined as the percentage of time during each clock cycle that the voltage on CKI exceeds the voltage on CKI2.
Table 61. Electrical Characteristics and Requirements
Parameter
Symbol
Min
Max
Unit
Input Voltage:
Low
V
IL
0.3
0.3 * V
DD
V
High
V
IH
0.7 * V
DD
V
DD
+ 0.3
V
Input Current (except TMS, TDI):
Low (V
IL
= 0 V, V
DD
= 5.25 V)
I
IL
5
--
A
High (V
IH
= 5.25 V, V
DD
= 5.25 V)
I
IH
--
5
A
Input Current (TMS, TDI):
Low (V
IL
= 0 V, V
DD
= 5.25 V)
I
IL
100
--
A
High (V
IH
= 5.25 V, V
DD
= 5.25 V)
I
IH
--
5
A
Output Low Voltage:
Low (I
OL
= 2.0 mA)
V
OL
--
0.4
V
Low (I
OL
= 50
A)
V
OL
--
0.2
V
Output High Voltage:
High (I
OH
= 2.0 mA)
V
OH
V
DD
0.7
--
V
High (I
OH
= 50
A)
V
OH
V
DD
0.2
--
V
Output 3-State Current:
Low (V
DD
= 5.25 V, V
IL
= 0 V)
I
OZL
10
--
A
High (V
DD
= 5.25 V, V
IH
= 5.25 V)
I
OZH
--
10
A
Input Capacitance
CI
--
5
pF
Table 62. Electrical Requirements for Mask-Programmable Input Clock Options
Parameter
Symbol
Min
Max
Unit
CKI CMOS Level Input Voltage:
Low
High
V
IL
V
IH
0.3
0.7 * V
DD
0.3 * V
DD
V
DD
+ 0.3
V
V
Small-signal Peak-to-peak Voltage
(on CKI)
Vpp
0.6
--
V
Small-signal Input Duty Cycle
DCyc
45
55
%
Small-signal Input Voltage Range
(pins: CKI, CKI2)
Vin
0.2 * V
DD
0.6 * V
DD
V
Small-signal Buffer Frequency Range
fss
--
35
MHz
CKI
CKI2
Data Sheet
DSP1629 Digital Signal Processor
January 2002
72
Agere Systems Inc.
9 Electrical Characteristics and Requirements
(continued)
Table 63. PLL Electrical Specifications, VCO Frequency Ranges
Parameter
Symbol
Min
Max
Unit
VCO Frequency Range (V
DD
= 3 V
10%)
*
*
The M and N counter values in the pllc register must be set so that the VCO will operate in the appropriate range (see Table 63, PLL Electrical
Specifications, VCO Frequency Ranges). Choose the lowest value of N and then the appropriate value of M for
f
INTERNAL CLOCK
=
f
CKI
x (M/
(2N)) =
f
VCO
/2.
f
VCO
50
160
MHz
VCO Frequency Range (V
DD
= 3.0 V
3.6 V)
f
VCO
50
200
MHz
Input Jitter at CKI
--
--
200
ps-rms
Table 64. PLL Electrical Specifications and pllc Register Settings
M
V
DD
pllc13 (ICP)
pllc12
Reserved
pllc[11:8]
(LF[3:0])
Typical Lock-in Time (
s)
*
*
Lock-in time represents the time following assertion of the PLLEN bit of the pllc register during which the PLL output clock is unstable. The
DSP must operate from the 1X CKI input clock or from the slow ring oscillator while the PLL is locking. Completion of the lock-in interval is
indicated by assertion of the LOCK flag.
23--24
2.7 V 3.6 V
1
0
1011
30
21--22
2.7 V 3.6 V
1
0
1010
30
19--20
2.7 V 3.6 V
1
0
1001
30
16--18
2.7 V 3.6 V
1
0
1000
30
12--15
2.7 V 3.6 V
1
0
0111
30
8--11
2.7 V 3.6 V
1
0
0110
30
2--7
2.7 V 3.6 V
1
0
0100
30
Data Sheet
January 2002
DSP1629 Digital Signal Processor
Agere Systems Inc.
73
9 Electrical Characteristics and Requirements
(continued)
Figure 10. Plot of V
OH
vs. I
OH
Under Typical Operating Conditions
Figure 11. Plot of V
OL
vs. I
OL
Under Typical Operating Conditions
0
10
20
30
40
5
15
25
35
45
50
DEVICE
UNDER
TEST
I
OH
(mA)
V
OH
(V
)
V
DD
0.1
V
DD
0.2
V
DD
0.3
V
DD
0.4
V
DD
I
OH
V
OH
5-4007 (F).a
5-4008 (F).b
DEVICE
UNDER
TEST
I
OL
V
OL
0.4
0.3
0.2
0.1
0
V
OL
(V
)
0
5
10
15
20
25
30
35
40
45
50
I
OL
(mA)
Data Sheet
DSP1629 Digital Signal Processor
January 2002
74
Agere Systems Inc.
9 Electrical Characteristics and Requirements
(continued)
9.1 Power Dissipation
Power dissipation is highly dependent on DSP program activity and the frequency of operation. The typical power
dissipation listed is for a selected application. The following electrical characteristics are preliminary and are subject
to change.
*
T = CKI clock cycle for 1X input clock option or T = CKI clock cycle divided by M/(2N) for PLL clock option (see Section 4.12, Clock Synthesis).
t
L
= PLL lock time (see Table 64, PLL Electrical Specifications and pllc Register Settings).
Table 65. Power Dissipation and Wake-Up Latency
Operating Mode
(Unused inputs at V
DD
or V
SS
)
V
DD
=
Typical Power Dissipation (mW)
Wake-Up Latency
I/O Units ON
powerc[7:4] = 0x0
I/O Units OFF
powerc[7:4] = 0xf
(PLL Not Used
During Wake State)
(PLL Used
During Wake State)
3 V
3 V
3 V
3 V
Normal Operation ioc = 0x0180
PLL Disabled
CKI and CKO = 40 MHz:
CMOS
93.7
91.2
--
--
Small Signal
96.3
93.7
--
--
CKI and CKO = 0 MHz:
CMOS
0.17
0.17
--
--
Small Signal
2.75
2.75
--
--
Normal Operationioc = 0x0180
PLL Enabled pllc = 0xFC0E
CKI = 10 MHz CKO = 40 MHz
CMOS
96.7
94.2
--
--
Small Signal
99.3
96.7
--
--
Power Management Modes CKO = 40 MHz
Standard Sleep, External Interrupt
alf[15] = 1, ioc = 0x0180
PLL Disabled During Sleep
CMOS
14.0
9.3
3T*
3T* + tL
Small Signal
16.3
12.0
3T*
3T* + tL
Standard Sleep, External Interrupt
alf[15] = 1, ioc = 0x0180
PLL Enabled During Sleep
CMOS
16.5
11.2
--
3T*
Small Signal
18.9
14.0
--
3T*
Sleep with Slow Internal Clock
Small Signal Enabled
powerc[15:14] = 01,
alf[15] = 1, ioc = 0x0180
PLL Disabled During Sleep
CMOS
0.7
0.5
5.0
s
5.0
s + tL
Small Signal
3.7
3.5
5.0
s
5.0
s + tL
Sleep with Slow Internal Clock
Small Signal Enabled
powerc[15:14] = 01,
alf[15] = 1, ioc = 0x0180
PLL Enabled During Sleep
CMOS
3.3
2.9
--
5.0
s
Small Signal
6.1
5.5
--
5.0
s
Data Sheet
January 2002
DSP1629 Digital Signal Processor
Agere Systems Inc.
75
9 Electrical Characteristics and Requirements
(continued)
*
T = CKI clock cycle for 1X input clock option or T = CKI clock cycle divided by M/(2N) for PLL clock option (see Section 4.12, Clock Synthesis).
t
L
= PLL lock time (see Table 64, PLL Electrical Specifications and pllc Register Settings).
The power dissipation listed is for internal power dissipation only. Total power dissipation can be calculated on the
basis of the application by adding C x V
DD
/2 x f for each output, where C is the additional load capacitance and f is
the output frequency.
Power dissipation due to the input buffers is highly dependent on the input voltage level. At full CMOS levels, es-
sentially no dc current is drawn. However, for levels between the power supply rails, especially at or near the thresh-
old of V
DD
/2, high currents can flow. Although input and I/O buffers may be left untied (since the input voltage levels
of the input and I/O buffers are designed to remain at full CMOS levels when not driven by the DSP), it is still rec-
ommended that unused input and I/O pins be tied to V
SS
or V
DD
through a 10 k
resistor to avoid application am-
biguities. Further, if I/O pins are tied high or low, they should be pulled fully to V
SS
or V
DD
.
WARNING: The device needs to be clocked for at least six CKI cycles during reset after powerup. Other-
wise, high currents may flow.
Table 65. Power Dissipation and Wake-Up Latency (continued)
Operating Mode
(Unused inputs at V
DD
or V
SS
)
V
DD
=
Typical Power Dissipation (mW)
Wake-Up Latency
I/O Units ON
powerc[7:4] = 0x0
I/O Units OFF
powerc[7:4] = 0xf
(PLL Not Used
During Wake State)
(PLL Used
During Wake State)
3 V
3 V
3 V
3 V
Sleep with Slow Internal Clock
Small Signal Disabled
powerc[15:14] = 11,
alf[15] = 1, ioc = 0x0180
PLL Disabled During Sleep
Small Signal
0.40
0.30
20
s
20
s + tL
Software Stop
powerc[15:12] = 0011
PLL Disabled During STOP
CMOS
0.060
0.060
3T*
3T* + tL
Software Stop
powerc[15:12] = 1111
PLL Disabled During STOP
Small Signal
0.060
0.060
20
s
20
s + tL
Hardware Stop (STOP = VSS)
powerc[15:12] = 0000
PLL Disabled During STOP
CMOS
0.060
0.060
3T*
--
Small Signal
1.20
1.20
3T*
--
Hardware Stop (STOP = VSS)
powerc[15:12] = 0000
PLL Enabled During STOP
CMOS
2.5
2.5
3T*
3T*
Small Signal
3.6
3.6
3T*
3T*
Data Sheet
DSP1629 Digital Signal Processor
January 2002
76
Agere Systems Inc.
10 Timing Characteristics for 3.0 V Operation
The following timing characteristics and requirements are preliminary information and are subject to change. Timing
characteristics refer to the behavior of the device under specified conditions. Timing requirements refer to conditions
imposed on the user for proper operation of the device. All timing data is valid for the following conditions:
T
A
= 40
C to +85
C (See Section 8.3, Recommended Operating Conditions.)
V
DD
= 3.0 V to 3.6 V, V
SS
= 0 V (See Section 8.3, Recommended Operating Conditions.)
Capacitance load on outputs (C
L
) = 50 pF, except for CKO, where C
L
= 20 pF.
Output characteristics can be derated as a function of load capacitance (C
L
).
All outputs: 0.03 ns/pF
dt/dC
L
0.07 ns/pF for 10
C
L
100 pF at V
IH
for rising edge and at V
IL
for falling edge.
For example, if the actual load capacitance is 30 pF instead of 50 pF, the derating for a rising edge is (30 50) pF
x 0.06 ns/pF = 1.2 ns less than the specified rise time or delay that includes a rise time.
Test conditions for inputs:
s
Rise and fall times of 4 ns or less
s
Timing reference levels for delays = V
IH
, V
IL
Test conditions for outputs (unless noted otherwise):
s
C
LOAD
= 50 pF; except for CKO, where C
LOAD
= 20 pF
s
Timing reference levels for delays = V
IH
, V
IL
s
3-state delays measured to the high-impedance state of the output driver
For the timing diagrams, see Table 62, Electrical Requirements for Mask-Programmable Input Clock Options, for
input clock requirements.
Unless otherwise noted, CKO in the timing diagrams is the free-running CKO.
Data Sheet
January 2002
DSP1629 Digital Signal Processor
Agere Systems Inc.
77
10 Timing Characteristics for 3.0 V Operation
(continued)
10.1 DSP Clock Generation (3.0 V Operation)
*
See Table 62, Electrical Requirements for Mask-Programmable Input Clock Options, for input clock electrical requirements.
Free-running clock.
Wait-stated clock (see Table 38, ioc Register).
W = number of wait-states.
Figure 12. I/O Clock Timing Diagram (3.0 V Operation)
Device speeds greater than 50 MIPS do not support 1X operation. Use the PLL.
Device is fully static, t1 is tested at 100 ns for 1X input clock option, and memory hold time is tested at 0.1 s.
T = internal clock period, set by CKI or by CKI and the PLL parameters.
Table 66. Timing Requirements for Input Clock (3.0 V Operation)
Abbreviated Reference
Parameter
Min
Max
Unit
t1
Clock In Period (high to high)
20
--
ns
t2
Clock In Low Time (low to high)
10
--
ns
t3
Clock In High Time (high to low)
10
--
ns
Table 67. Timing Characteristics for Input Clock and Output Clock (3.0 V Operation)
Abbreviated Reference
Parameter
Min
Max
Unit
t4
Clock Out High Delay
--
10
ns
t5
Clock Out Low Delay (high to low)
--
10
ns
t6
Clock Out Period (low to low)
T
--
ns
t6a
Clock Out Period with SLOWCKI Bit Set in powerc
Register (low to low)
0.74
3.8
s
5-4009 (F).a
t4
t1
t2
1X CKI*
t5
CKO
t3
t6, t6a
CKO
EXTERNAL MEMORY CYCLE
W = 1
Data Sheet
DSP1629 Digital Signal Processor
January 2002
78
Agere Systems Inc.
10 Timing Characteristics for 3.0 V Operation
(continued)
10.2 Reset Circuit (3.0 V Operation)
The DSP1629 has two external reset pins: RSTB and TRST. At initial powerup, or if the supply voltage falls below
V
DD
MIN* and a device reset is required, both TRST and RSTB must be asserted to initialize the device. Figure 13,
Powerup Reset and Chip Reset Timing Diagram (3.0 V Operation), shows two separate events:
s
Chip reset at initial powerup.
s
Chip reset following a drop in power supply.
Note: The TRST pin must be asserted even if the JTAG controller is not used by the application.
*
See Table 60, Recommended Operating Conditions.
*
When both INT0 and RSTB are asserted, all output and bidirectional pins (except TDO, which 3-states by JTAG control) are put in a 3-state
condition. With RSTB asserted and INT0 not asserted, EROM, ERAMHI, ERAMLO, IO, and RWN outputs remain high, and CKO remains a
free-running clock.
See Table 62, Electrical Requirements for Mask-Programmable Input Clock Options, for input clock electrical requirements.
Figure 13. Powerup Reset and Chip Reset Timing Diagram (3.0 V Operation)
Note: The device needs to be clocked for at least six CKI cycles during reset after powerup. Otherwise, high cur-
rents may flow.
Table 68. Timing Requirements for Powerup Reset and Chip Reset (3.0 V Operation)
Abbreviated Reference
Parameter
Min
Max
Unit
t8
RSTB and TRST Reset Pulse (low to high)
6T
--
ns
t9
V
DD
Ramp
--
10
ms
t146
V
DD
MIN to RSTB Low:
CMOS
Small-signal
2T
20
--
--
ns
s
t153
RSTB (low to high)
--
54
ns
Table 69. Timing Characteristics for Powerup Reset and Chip Reset (3.0 V Operation)
Abbreviated Reference
Parameter
Min
Max
Unit
t10
RSTB Disable Time (low to 3-state)
--
100
ns
t11
RSTB Enable Time (high to valid)
--
100
ns
V
DD
RAMP
RSTB,
TRST
OUTPUT
PINS *
CKI
t11
V
OH
V
OL
V
IH
V
IL
t9
t146
t10
0.4 V
V
DD
MIN
t11
V
DD
MIN
0.4 V
t10
t9
t146
t153
t8
t153
t8
5-4010 (F).a
Data Sheet
January 2002
DSP1629 Digital Signal Processor
Agere Systems Inc.
79
10 Timing Characteristics for 3.0 V Operation
(continued)
10.3 Reset Synchronization (3.0 V Operation)
*
See Table 62, Electrical Requirements for Mask-Programmable Input Clock Options, for input clock electrical requirements.
Notes:
CKO
1
and CKO
2
are two possible CKO states before reset. CKO is free-running.
If the rising edge of RSTB (low to high) is captured instead by the falling edge of CKO (high to low), CKO and CKI will be in-phase at t5 + 2 x t6.
Figure 14. Reset Synchronization Timing (3.0 V Operation)
Table 70. Timing Requirements for Reset Synchronization Timing (3.0 V Operation)
Abbreviated Reference
Parameter
Min
Max
Unit
t126
Reset Setup (high to high)
3
T/2 1
ns
5-4011 (F).a
CKI
*
V
IH
V
IL
t126
t5 + 2 x t6
RSTB
V
IH
V
IL
V
IH
V
IL
CKO
V
IH
V
IL
CKO
Data Sheet
DSP1629 Digital Signal Processor
January 2002
80
Agere Systems Inc.
10 Timing Characteristics for 3.0 V Operation
(continued)
10.4 JTAG I/O Specifications (3.0 V Operation)
Figure 15. JTAG Timing Diagram (3.0 V Operation)
Table 71. Timing Requirements for JTAG Input/Output (3.0 V Operation)
Abbreviated Reference
Parameter
Min
Max
Unit
t12
TCK Period (high to high)
50
--
ns
t13
TCK High Time (high to low)
22.5
--
ns
t14
TCK Low Time (low to high)
22.5
--
ns
t155
TCK Rise Transition Time (low to high)
0.6
--
V/ns
t156
TCK Fall Transition Time (high to low)
0.6
--
V/ns
t15
TMS Setup Time (valid to high)
7.5
--
ns
t16
TMS Hold Time (high to invalid)
2
--
ns
t17
TDI Setup Time (valid to high)
7.5
--
ns
t18
TDI Hold Time (high to invalid)
2
--
ns
Table 72. Timing Characteristics for JTAG Input/Output (3.0 V Operation)
Abbreviated Reference
Parameter
Min
Max
Unit
t19
TDO Delay (low to valid)
--
19
ns
t20
TDO Hold (low to invalid)
0
--
ns
t12
t14
t13
t15
t16
t17
t18
t19
t20
TCK
TMS
TDI
TDO
V
IH
V
IL
V
IH
V
IL
V
IH
V
IL
V
OH
V
OL
t155
t156
5-4017 (F)
Data Sheet
January 2002
DSP1629 Digital Signal Processor
Agere Systems Inc.
81
10 Timing Characteristics for 3.0 V Operation
(continued)
10.5 Interrupt (3.0 V Operation)
*
CKO is free-running.
IACK assertion is guaranteed to be enclosed by VEC[3:0] assertion.
Figure 16. Interrupt Timing Diagram (3.0 V Operation)
Note: Interrupt is asserted during an interruptible instruction and no other pending interrupts.
Note: Interrupt is asserted during an interruptible instruction and no other pending interrupts.
Table 73. Timing Requirements for Interrupt (3.0 V Operation)
Abbreviated Reference
Parameter
Min
Max
Unit
t21
Interrupt Setup (high to low)
19
--
ns
t22
INT Assertion Time (high to low)
2T
--
ns
Table 74. Timing Characteristics for Interrupt (3.0 V Operation)
Abbreviated Reference
Parameter
Min
Max
Unit
t23
IACK Assertion Time (low to high)
--
T/2 + 10
ns
t24
VEC Assertion Time (low to high)
--
12.5
ns
t25
IACK Invalid Time (low to low)
--
10
ns
t26
VEC Invalid Time (low to low)
--
12.5
ns
5-4018 (F)
CKO
*
INT[1:0]
t21
V
OH
V
OL
V
IH
V
IL
t22
IACK
V
OH
V
OL
VEC[3:0]
V
OH
V
OL
t23
t24
t25
t26
Data Sheet
DSP1629 Digital Signal Processor
January 2002
82
Agere Systems Inc.
10 Timing Characteristics for 3.0 V Operation
(continued)
10.6 Bit Input/Output (BIO) (3.0 V Operation)
Figure 17. Write Outputs Followed by Read Inputs (cbit = Immediate; a1 = sbit) (3.0 V Operation)
Figure 18. Write Outputs and Test Inputs (cbit = Immediate) (3.0 V Operation)
Table 75. Timing Requirements for BIO Input Read (3.0 V Operation)
Abbreviated Reference
Parameter
Min
Max
Unit
t27
IOBIT Input Setup Time (valid to high)
15
--
ns
t28
IOBIT Input Hold Time (high to invalid)
0
--
ns
Table 76. Timing Characteristics for BIO Output (3.0 V Operation)
Abbreviated Reference
Parameter
Min
Max
Unit
t29
IOBIT Output Valid Time (low to valid)
--
9
ns
t144
IOBIT Output Hold Time (low to invalid)
1
--
ns
Table 77. Timing Requirements for BIO Input Test (3.0 V Operation)
Abbreviated Reference
Parameter
Min
Max
Unit
t141
IOBIT Input Setup Time (valid to low)
15
--
ns
t142
IOBIT Input Hold Time (low to invalid)
0
--
ns
CKO
IOBIT
(INPUT)
t28
t27
VALID OUTPUT
V
I
H
V
I
L
V
O
H
V
O
L
V
O
H
V
O
L
DATA INPUT
t29
t144
IOBIT
(OUTPUT)
5-4019 (F).a
CKO
IOBIT
(INPUT)
t142
t141
VALID OUTPUT
V
OH
V
O
L
TEST INPUT
t29
t144
IOBIT
(OUTPUT)
V
OH
V
O
L
V
IH
V
I
L
5-4019 (F).b
Data Sheet
January 2002
DSP1629 Digital Signal Processor
Agere Systems Inc.
83
10 Timing Characteristics for 3.0 V Operation
(continued)
10.7 External Memory Interface (3.0 V Operation)
The following timing diagrams, characteristics, and requirements do not apply to interactions with delayed external
memory enables unless so stated. See the
DSP1611/17/18/27/28/29 Digital Signal Processor
Information Manual
for a detailed description of the external memory interface, including other functional diagrams.
*
W = number of wait-states.
Figure 19. Enable Transition Timing (3.0 V Operation)
Table 78. Timing Characteristics for External Memory Enables (EROM, ERAMHI, IO, ERAMLO) (3.0 V Oper-
ation)
Abbreviated Reference
Parameter
Min
Max
Unit
t33
CKO to ENABLE Active (low to low)
0
4.5
ns
t34
CKO to ENABLE Inactive (low to high)
1
4
ns
Table 79. Timing Characteristics for Delayed External Memory Enables (ioc = 0x000F) (3.0 V Operation)
Abbreviated Reference
Parameter
Min
Max
Unit
t33
CKO to Delayed ENABLE Active (low to low)
T/2
T/2 + 7
ns
CKO
ENABLE
t34
t33
W
*
= 0
V
OH
V
OL
V
OH
V
OL
5-4020 (F).b
Data Sheet
DSP1629 Digital Signal Processor
January 2002
84
Agere Systems Inc.
10 Timing Characteristics for 3.0 V Operation
(continued)
*
W = number of wait-states.
Figure 20. External Memory Data Read Timing Diagram (3.0 V Operation)
Table 80. Timing Characteristics for External Memory Access (3.0 V Operation)
Abbreviated Reference
Parameter
Min
Max
Unit
t127
Enable Width (low to high)
T(1 + W) 1.5
--
ns
t128
Address Valid (enable low to valid)
--
2
ns
Table 81. Timing Requirements for External Memory Read (EROM, ERAMHI, IO, ERAMLO) (3.0 V Operation)
Abbreviated Reference
Parameter
Min
Max
Unit
t129
Read Data Setup (valid to enable high)
12
--
ns
t130
Read Data Hold (enable high to hold)
0
--
ns
t150
External Memory Access Time (valid to valid)
--
T(1 + W) 13
ns
V
IH
V
IL
DB
CKO
AB
V
OH
V
OL
t128
READ ADDRESS
ENABLE
V
OH
V
OL
V
OH
V
OL
(MWAIT = 0 x 2222)
W* = 2
t127
t129
t130
READ DATA
t150
5-4021 (F).a
Data Sheet
January 2002
DSP1629 Digital Signal Processor
Agere Systems Inc.
85
10 Timing Characteristics for 3.0 V Operation
(continued)
*
W = number of wait-states.
Figure 21. External Memory Data Write Timing Diagram (3.0 V Operation)
Table 82. Timing Characteristics for External Memory Data Write (All Enables) (3.0 V Operation)
Abbreviated Reference
Parameter
Min
Max
Unit
t131
Write Overlap (enable low to 3-state)
--
0
ns
t132
RWN Advance (RWN high to enable high)
0
--
ns
t133
RWN Delay (enable low to RWN low)
0
--
ns
t134
Write Data Setup (data valid to RWN high)
T(1 + W)/2 3
--
ns
t135
RWN Width (low to high)
T(1 + W) 4
--
ns
t136
Write Address Setup (address valid to RWN low)
0
--
ns
ERAMLO
EROM
CKO
AB
RWN
DB
WRITE ADDRESS
READ ADDRESS
V
OH
V
OL
V
OH
V
OL
V
OH
V
OL
V
OH
V
OL
V
OH
V
OL
WRITE DATA
READ
W* = 1
t131
t132
t134
t133
t135
t136
(MWAIT = 0x1002)
W* = 2
V
OH
V
OL
5-4022 (F).a
Data Sheet
DSP1629 Digital Signal Processor
January 2002
86
Agere Systems Inc.
10 Timing Characteristics for 3.0 V Operation
(continued)
*
W = number of wait-states.
Figure 22. Write Cycle Followed by Read Cycle (3.0 V Operation)
Table 83. Timing Characteristics for Write Cycle Followed by Read Cycle (3.0 V Operation)
Abbreviated Reference
Parameter
Min
Max
Unit
t131
Write Overlap (enable low to 3-state)
--
0
ns
t137
Write Data 3-state (RWN high to 3-state)
--
2
ns
t138
Write Data Hold (RWN high to data hold)
0
--
ns
t139
Write Address Hold (RWN high to address hold)
0
--
ns
ERAMLO
CKO
AB
RWN
WRITE ADDRESS
READ ADDRESS
V
OH
V
OL
V
OH
V
OL
V
OH
V
OL
V
OH
V
OL
W* = 1
t137
(MWAIT = 0x1002)
W* = 2
EROM
V
OH
V
OL
DB
WRITE
READ
V
OH
V
OL
t138
t139
t131
5-4023 (F).a
Data Sheet
January 2002
DSP1629 Digital Signal Processor
Agere Systems Inc.
87
10 Timing Characteristics for 3.0 V Operation
(continued)
10.8 PHIF Specifications (3.0 V Operation)
For the PHIF, read means read by the external user (output by the DSP); write is similarly defined. The 8-bit reads/writes
are identical to one-half of a 16-bit access.
Figure 23. PHIF
Intel
Mode Signaling (Read and Write) Timing Diagram (3.0 V Operation)
*
This timing diagram for the PHIF port shows accesses using the PCSN signal to initiate and complete a transaction. The transactions can also be
initiated and completed with the PIDS and PODS signals. An output transaction (read) is initiated by PCSN or PODS going low, whichever comes
last. For example, the timing requirements referenced to PCSN going low, t45 and t49, should be referenced to PODS going low, i f PODS goes low
after PCSN. An output transaction is completed by PCSN or PODS going high, whichever comes first. An input transaction is initiated by PCSN or
PIDS going low, whichever comes last. An input transaction is completed by PCSN or PIDS going high, whichever comes first. All requirements
referenced to PCSN apply to PIDS or PODS, if PIDS or PODS is the controlling signal.
Table 84. Timing Requirements for PHIF
Intel Mode Signaling
(3.0 V Operation)
Abbreviated Reference
Parameter
Min
Max
Unit
t41
PODS to PCSN Setup (low to low)
0
--
ns
t42
PCSN to PODS Hold (high to high)
0
--
ns
t43
PIDS to PCSN Setup (low to low)
0
--
ns
t44
PCSN to PIDS Hold (high to high)
0
--
ns
t45*
PSTAT to PCSN Setup (valid to low)
4
--
ns
t46*
PCSN to PSTAT Hold (high to invalid)
0
--
ns
t47*
PBSEL to PCSN Setup (valid to low)
6
--
ns
t48*
PCSN to PBSEL Hold (high to invalid)
0
--
ns
t51*
PB Write to PCSN Setup (valid to high)
10
--
ns
t52*
PCSN to PB Write Hold (high to invalid)
4
--
ns
Table 85. Timing Characteristics for PHIF
Intel Mode Signaling
(3.0 V Operation)
Abbreviated Reference
Parameter
Min
Max
Unit
t49
*
*
This timing diagram for the PHIF port shows accesses using the PCSN signal to initiate and complete a transaction. The transactions can also
be initiated and completed with the PIDS and PODS signals. An output transaction (read) is initiated by PCSN or PODS going low, whichever
comes last. For example, the timing requirements referenced to PCSN going low, t45 and t49, should be referenced to PODS going low, if PODS
goes low after PCSN. An output transaction is completed by PCSN or PODS going high, whichever comes first. An input transaction is initiated
by PCSN or PIDS going low, whichever comes last. An input transaction is completed by PCSN or PIDS going high, whichever comes first. All
requirements referenced to PCSN apply to PIDS or PODS, if PIDS or PODS is the controlling signal.
PCSN to PB Read (low to valid)
--
12
ns
t50*
PCSN to PB Read Hold (high to invalid)
0
--
ns
t154
PCSN to PB Read 3-state (high to 3-state)
--
8
ns
5-4036 (F)
PCSN
t41
t42
t43
t45
t46
t49
t50
16-bit READ
16-bit WRITE
PODS
PIDS
PBSEL
PSTAT
PB[7:0]
t47
t51
t52
t48
t44
t154
V
IH
V
IL
V
IH
V
IL
V
IH
V
IL
V
IH
V
IL
V
IH
V
IL
V
IH
V
IL
Data Sheet
DSP1629 Digital Signal Processor
January 2002
88
Agere Systems Inc.
10 Timing Characteristics for 3.0 V Operation
(continued)
Figure 24. PHIF
Intel
Mode Signaling (Pulse Period and Flags) Timing Diagram (3.0 V Operation)
Table 86. Timing Requirements for PHIF
Intel
Mode Signaling (3.0 V Operation)
Abbreviated Reference
Parameter
Min
Max
Unit
t55
PCSN/PODS/PIDS Pulse Width (high to low)
20.5
--
ns
t56
PCSN/PODS/PIDS Pulse Width (low to high)
20.5
--
ns
Table 87. Timing Characteristics for PHIF
Intel
Mode Signaling (3.0 V Operation)
Abbreviated Reference
Parameter
Min
Max
Unit
t53
*
*
t53 should be referenced to the rising edge of PCSN or PODS, whichever comes first.
t54 should be referenced to the rising edge of PCSN
or PIDS, whichever comes first.
PCSN/PODS to POBE
(high to high)
POBE and PIBF may be programmed to be the opposite logic levels shown in the diagram (positive assertion levels shown). t53 and t54
apply to the inverted levels as well as those shown.
--
17
ns
t54*
PCSN/PIDS to PIBF
(high to high)
--
17
ns
PODS
PIDS
V
IH
V
IL
V
IH
V
IL
V
IH
V
IL
t55
t56
t55
t56
t55
t56
PCSN
t53
t54
16-bit READ
8-bit WRITE
PBSEL
POBE
PIBF
t54
V
OH
V
OL
V
OH
V
OL
V
OH
V
OL
t56
t56
t55
t53
8-bit READ
16-bit WRITE
5-4037 (F).a
Data Sheet
January 2002
DSP1629 Digital Signal Processor
Agere Systems Inc.
89
10 Timing Characteristics for 3.0 V Operation
(continued)
Figure 25. PHIF
Motorola
Mode Signaling (Read and Write) Timing Diagram (3.0 V Operation)
*
This timing diagram for the PHIF port shows accesses using the PCSN signal to initiate and complete a transaction. The transactions can
also be initiated and completed with the PDS signal. An input/output transaction is initiated by PCSN or PDS going low, whichever comes last.
For example, the timing requirements referenced to PCSN going low, t45 and t49, should be referenced to PDS going low, if PDS goes low
after PCSN. An input/output transaction is completed by PCSN or PDS going high, whichever comes first. All requirements referenced to
PCSN should be referenced to PDS, if PDS is the controlling signal. PRWN should never be used to initiate or complete a transaction.
PDS is programmable to be active-high or active-low. It is shown active-low in Figures 49 and 50. POBE and PIBF may be programmed to
be the opposite logic levels shown in the diagram. t53 and t54 apply to the inverted levels as well as those shown.
*
This timing diagram for the PHIF port shows accesses using the PCSN signal to initiate and complete a transaction. The transactions can
also be initiated and completed with the PDS signal. An input/output transaction is initiated by PCSN or PDS going low, whichever comes last.
For example, the timing requirements referenced to PCSN going low, t45 and t49, should be referenced to PDS going low, if PDS goes low
after PCSN. An input/output transaction is completed by PCSN or PDS going high, whichever comes first. All requirements referenced to
PCSN should be referenced to PDS, if PDS is the controlling signal. PRWN should never be used to initiate or complete a transaction.
Table 88. Timing Requirements for PHIF
Motorola
Mode Signaling (3.0 V Operation)
Abbreviated Reference
Parameter
Min
Max
Unit
t41
PDS
to PCSN Setup (valid to low)
0
--
ns
t42
PCSN to PDS
Hold (high to invalid)
0
--
ns
t43
PRWN to PCSN Setup (valid to low)
4
--
ns
t44
PCSN to PRWN Hold (high to invalid)
0
--
ns
t45*
PSTAT to PCSN Setup (valid to low)
4
--
ns
t46*
PCSN to PSTAT Hold (high to invalid)
0
--
ns
t47*
PBSEL to PCSN Setup (valid to low)
6
--
ns
t48*
PCSN to PBSEL Hold (high to invalid)
0
--
ns
t51*
PB Write to PCSN Setup (valid to high)
10
--
ns
t52*
PCSN to PB Write Hold (high to invalid)
4
--
ns
Table 89. Timing Characteristics for PHIF
Motorola
Mode Signaling (3.0 V Operation)
Abbreviated Reference
Parameter
Min
Max
Unit
t49*
PCSN to PB Read (low to valid)
--
12
ns
t50*
PCSN to PB Read Hold (high to invalid)
0
--
ns
t154
PCSN to PB Read 3-state (high to 3-state)
--
8
ns
PCSN
PDS
PRWN
PBSEL
PSTAT
PB[7:0]
t41
t42
t43
t44
t45
t46
t47
t48
t52
t51
t50
t49
16-bit READ
16-bit WRITE
t43
t44
t154
5-4038 (F).a
V
IH
--
V
IL
--
V
IH
--
V
IL
--
V
IH
--
V
IL
--
V
IH
--
V
IL
--
V
IH
--
V
IL
--
V
IH
--
V
IL
--
Data Sheet
DSP1629 Digital Signal Processor
January 2002
90
Agere Systems Inc.
10 Timing Characteristics for 3.0 V Operation
(continued)
Figure 26. PHIF
Motorola
Mode Signaling (Pulse Period and Flags) Timing Diagram (3.0 V Operation)
* An input/output transaction is initiated by PCSN or PDS going low, whichever comes last. For example, t53 and t54 should be referenced to
PDS going low, if PDS goes low after PCSN. An input/output transaction is completed by PCSN or PDS going high, whichever comes first.
All requirements referenced to PCSN should be referenced to PDS, if PDS is the controlling signal. PRWN should never be used to initiate or
complete a transaction.
PDS is programmable to be active-high or active-low. It is shown active-low in Figures 49 and 50. POBE and PIBF may be programmed to
be the opposite logic levels shown in the diagram. t53 and t54 apply to the inverted levels as well as those shown.
Table 90. Timing Characteristics for PHIF
Motorola
Mode Signaling (3.0 V Operation)
Abbreviated Reference
Parameter
Min
Max
Unit
t53*
PCSN/PDS
to POBE
(high to high)
--
17
ns
t54*
PCSN/PDS
to PIBF
(high to high)
--
17
ns
Table 91. Timing Requirements for PHIF
Motorola
Mode Signaling (3.0 V Operation)
Abbreviated Reference
Parameter
Min
Max
Unit
t55
PCSN/PDS/PRWN Pulse Width (high to low)
20
--
ns
t56
PCSN/PDS/PRWN Pulse Width (low to high)
20
--
ns
5-4039 (F).a
PDS
PIDS
V
IH
t55
t56
t55
t56
t55
t56
PCSN
t53
t54
16-bit READ
8-bit WRITE
PBSEL
POBE
PIBF
t54
t56
t56
t55
t53
8-bit READ
16-bit WRITE
V
IL
V
IH
V
IL
V
IH
V
IL
V
OH
V
OL
V
OH
V
OL
V
OH
V
OL
Data Sheet
January 2002
DSP1629 Digital Signal Processor
Agere Systems Inc.
91
10 Timing Characteristics for 3.0 V Operation
(continued)
*
Motorola
mode signal name.
Figure 27. PHIF
Intel
or
Motorola
Mode Signaling (Status Register Read) Timing Diagram (3.0 V Operation)
t45, t47, and t49 are referenced to the falling edge of PCSN or PODS(PDS), whichever occurs last.
t46, t48, and t50 are referenced to the rising edge of PCSN or PODS(PDS), whichever occurs first.
t45, t47, and t49 are referenced to the falling edge of PCSN or PODS(PDS), whichever occurs last.
t46, t48, t154, and t50 are referenced to the rising edge of PCSN or PODS(PDS), whichever occurs first.
Table 92. Timing Requirements for
Intel
and
Motorola
Mode Signaling (Status Register Read) (3.0 V Opera-
tion)
Abbreviated Reference
Parameter
Min
Max
Unit
t45
PSTAT to PCSN Setup (valid to low)
4
--
ns
t46
PCSN to PSTAT Hold (high to invalid)
0
--
ns
t47
PBSEL to PCSN Setup (valid to low)
6
--
ns
t48
PCSN to PBSEL Hold (high to invalid)
0
--
ns
Table 93. Timing Characteristics for
Intel
and
Motorola
Mode Signaling (Status Register Read) (3.0 V Oper-
ation)
Abbreviated Reference
Parameter
Min
Max
Unit
t49
PCSN to PB Read (low to valid)
--
12
ns
t50
PCSN to PB Read Hold (high to invalid)
0
--
ns
t154
PCSN to PB Read 3-state (high to 3-state)
--
8
ns
PCSN
PODS (PDS*)
PIDS (PRWN*)
PBSEL
PSTAT
PB[7:0]
t47
t48
t45
t46
t49
t50
5-4040 (F).a
t154
V
IH
--
V
IL
--
V
IH
--
V
IL
--
V
IH
--
V
IL
--
V
IH
--
V
IL
--
V
IH
--
V
IL
--
V
IH
--
V
IL
--
Data Sheet
DSP1629 Digital Signal Processor
January 2002
92
Agere Systems Inc.
10 Timing Characteristics for 3.0 V Operation
(continued)
Figure 28. PHIF, PIBF, and POBE Reset Timing Diagram (3.0 V Operation)
*
After reset, POBE and PIBF always go to the levels shown, indicating output buffer empty and input buffer empty. The DSP program, however,
may later invert the definition of the logic levels for POBE and PIBF. t57 and t58 continue to apply.
POBE and PIBF can be programmed to be active-high or active-low. They are shown active-high. The timing characteristic for active-low is
the same as for active-high
.
Figure 29. PHIF, PIBF, and POBE Disable Timing Diagram (3.0 V Operation)
Table 94. PHIF Timing Characteristics for PHIF, PIBF, and POBE Reset (3.0 V Operation)
Abbreviated Reference
Parameter
Min
Max
Unit
t57
RSTB Disable to POBE/PIBF* (high to valid)
--
25
ns
t58
RSTB Enable to POBE/PIBF* (low to invalid)
3
25
ns
Table 95. PHIF Timing Characteristics for POBE and PIBF Disable (3.0 V Operation)
Abbreviated Reference
Parameter
Min
Max
Unit
t59
CKO to POBE/PIBF Disable (high/low to disable)
--
20
ns
RSTB
V
IH
t58
t57
V
IL
POBE
V
OH
V
OL
PIBF
V
OH
V
OL
5-4775 (F)
CKO
V
IH
V
IL
t59
t59
POBE
V
OH
V
OL
PIBF
V
OH
V
OL
5-4776 (F)
Data Sheet
January 2002
DSP1629 Digital Signal Processor
Agere Systems Inc.
93
10 Timing Characteristics for 3.0 V Operation
(continued)
10.9 Serial I/O Specifications (3.0 V Operation)
*
N = 16 bits or 8 bits.
Figure 30. SIO Passive Mode Input Timing Diagram (3.0 V Operation)
For multiprocessor mode, see note in Section 11.10, Multiprocessor Communication (2.7 V Operation).
Device is fully static; t70 is tested at 200 ns.
Table 96. Timing Requirements for Serial Inputs (3.0 V Operation)
Abbreviated Reference
Parameter
Min
Max
Unit
t70
Clock Period (high to high)
40
--
ns
t71
Clock Low Time (low to high)
18
--
ns
t72
Clock High Time (high to low)
18
--
ns
t73
Load High Setup (high to high)
8
--
ns
t74
Load Low Setup (low to high)
8
--
ns
t75
Load High Hold (high to invalid)
0
--
ns
t77
Data Setup (valid to high)
7
--
ns
t78
Data Hold (high to invalid)
0
--
ns
Table 97. Timing Characteristics for Serial Outputs (3.0 V Operation)
Abbreviated Reference
Parameter
Min
Max
Unit
t79
IBF Delay (high to high)
--
35
ns
IBF
V
OH
V
OL
DI
V
IH
V
IL
ILD
V
IH
V
IL
ICK
V
IH
V
IL
BN 1*
B0
t77
t78
B0
B1
t79
t72
t71
t70
t75
t74
t75
t73
5-4777 (F)
Data Sheet
DSP1629 Digital Signal Processor
January 2002
94
Agere Systems Inc.
10 Timing Characteristics for 3.0 V Operation
(continued)
*
ILD goes high during bit 6 (of 0:15); N = 8 or 16.
Figure 31. SIO Active Mode Input Timing Diagram (3.0 V Operation)
Table 98. Timing Requirements for Serial Inputs (3.0 V Operation)
Abbreviated Reference
Parameter
Min
Max
Unit
t77
Data Setup (valid to high)
7
--
ns
t78
Data Hold (high to invalid)
0
--
ns
Table 99. Timing Characteristics for Serial Outputs (3.0 V Operation)
Abbreviated Reference
Parameter
Min
Max
Unit
t76a
ILD Delay (high to low)
--
35
ns
t101
ILD Hold (high to invalid)
3
--
ns
t79
IBF Delay (high to high)
--
35
ns
IBF
V
OH
V
OL
DI
V
IH
V
IL
ILD
V
OH
V
OL
ICK
V
OH
V
OL
BN 1
B0
t77
t78
B0
B1
t79
t101
t76a
*
5-4778 (F)
Data Sheet
January 2002
DSP1629 Digital Signal Processor
Agere Systems Inc.
95
10 Timing Characteristics for 3.0 V Operation
(continued)
*
See sioc register, MSB field, to determine if B0 is the MSB or LSB. See sioc register, ILEN field, to determine if the DO word length is 8 bits
or 16 bits.
Figure 32. SIO Passive Mode Output Timing Diagram (3.0 V Operation)
For multiprocessor mode, see note in Section 11.10, Multiprocessor Communication (2.7 V Operation).
Device is fully static; t80 is tested at 200 ns.
Table 100. Timing Requirements for Serial Inputs (3.0 V Operation)
Abbreviated Reference
Parameter
Min
Max
Unit
t80
Clock Period (high to high)
40
--
ns
t81
Clock Low Time (low to high)
18
--
ns
t82
Clock High Time (high to low)
18
--
ns
t83
Load High Setup (high to high)
8
--
ns
t84
Load Low Setup (low to high)
8
--
ns
t85
Load Hold (high to invalid)
0
--
ns
Table 101. Timing Characteristics for Serial Outputs (3.0 V Operation)
Abbreviated Reference
Parameter
Min
Max
Unit
t87
Data Delay (high to valid)
--
35
ns
t88
Enable Data Delay (low to active)
--
35
ns
t89
Disable Data Delay (high to 3-state)
--
35
ns
t90
Data Hold (high to invalid)
3
--
ns
t92
Address Delay (high to valid)
--
35
ns
t93
Address Hold (high to invalid)
3
--
ns
t94
Enable Delay (low to active)
--
35
ns
t95
Disable Delay (high to 3-state)
--
35
ns
t96
OBE Delay (high to high)
--
35
ns
DOEN
V
IH
V
IL
SADD
V
OH
V
OL
OLD
V
IH
V
IL
OCK
V
IH
V
IL
t85
t80
t81
t82
t84
t83
t85
t88
B0
B1
B7
BN 1
t90
t90
t87
t94
AD0
AD1
AD7
t93
t93
t92
AS7
t89
t95
OBE
V
OH
V
OL
DO*
V
OH
V
OL
t96
5-4796 (F)
Data Sheet
DSP1629 Digital Signal Processor
January 2002
96
Agere Systems Inc.
10 Timing Characteristics for 3.0 V Operation
(continued)
*
OLD goes high at the end of bit 6 of 0:15.
Figure 33. SIO Active Mode Output Timing Diagram (3.0 V Operation)
Table 102. Timing Characteristics for Serial Output (3.0 V Operation)
Abbreviated Reference
Parameter
Min
Max
Unit
t86a
OLD Delay (high to low)
--
35
ns
t102
OLD Hold (high to invalid)
3
--
ns
t87
Data Delay (high to valid)
--
35
ns
t88
Enable Data Delay (low to active)
--
35
ns
t89
Disable Data Delay (high to 3-state)
--
35
ns
t90
Data Hold (high to invalid)
3
--
ns
t92
Address Delay (high to valid)
--
35
ns
t93
Address Hold (high to invalid)
3
--
ns
t94
Enable Delay (low to active)
--
35
ns
t95
Disable Delay (high to 3-state)
--
35
ns
t96
OBE Delay (high to high)
--
35
ns
DOEN
V
IH
V
IL
SADD
V
OH
V
OL
OLD
V
OH
V
OL
OCK
V
OH
V
OL
t102
t86a
t88
B0
B1
B7
BN 1
t90
t90
t87
t94
AD0
AD1
AD7
t93
t93
t92
AS7
t89
t95
OBE
V
OH
V
OL
DO
V
OH
V
OL
t96
*
5-4797 (F)
Data Sheet
January 2002
DSP1629 Digital Signal Processor
Agere Systems Inc.
97
10 Timing Characteristics for 3.0 V Operation
(continued)
*
See sioc register, LD field.
Figure 34. Serial I/O Active Mode Clock Timing (3.0 V Operation)
Table 103. Timing Characteristics for Signal Generation (3.0 V Operation)
Abbreviated Reference
Parameter
Min
Max
Unit
t97
ICK Delay (high to high)
--
18
ns
t98
ICK Delay (high to low)
--
18
ns
t99
OCK Delay (high to high)
--
18
ns
t100
OCK Delay (high to low)
--
18
ns
t76a
ILD Delay (high to low)
--
35
ns
t76b
ILD Delay (high to high)
--
35
ns
t101
ILD Hold (high to invalid)
3
--
ns
t86a
OLD Delay (high to low)
--
35
ns
t86b
OLD Delay (high to high)
--
35
ns
t102
OLD Hold (high to invalid)
3
--
ns
t103
SYNC Delay (high to low)
--
35
ns
t104
SYNC Delay (high to high)
--
35
ns
t105
SYNC Hold (high to invalid)
3
--
ns
ICK
V
OH
V
OL
CKO
V
OH
V
OL
t97
OCK
V
OH
V
OL
ICK/OCK*
V
OH
ILD
V
OH
V
OL
OLD
V
OH
V
OL
SYNC
V
OH
V
OL
t99
t98
t100
t101
t76a
t101
t76b
t102
t86a
t102
t86b
t105
t103
t105
t104
5-4798 (F)
Data Sheet
DSP1629 Digital Signal Processor
January 2002
98
Agere Systems Inc.
10 Timing Characteristics for 3.0 V Operation
(continued)
10.10 Multiprocessor Communication (3.0 V Operation)
*
Negative edge initiates time slot 0.
Figure 35. SIO Multiprocessor Timing Diagram (3.0 V Operation)
Note: All serial I/O timing requirements and characteristics still apply, but the minimum clock period in passive
multiprocessor mode, assuming 50% duty cycle, is calculated as (t77 + t116) * 2.
With capacitance load on ICK, OCK, DO, SYNC, and SADD = 100 pF, add 4 ns to t116--t122.
Table 104. Timing Requirements for SIO Multiprocessor Communication (3.0 V Operation)
Abbreviated Reference
Parameter
Min
Max
Unit
t112
Sync Setup (high/low to high)
35
--
ns
t113
Sync Hold (high to high/low)
0
--
ns
t114
Address Setup (valid to high)
12
--
ns
t115
Address Hold (high to invalid)
0
--
ns
Table 105. Timing Characteristics for SIO Multiprocessor Communication (3.0 V Operation)
Abbreviated Reference
Parameter
Min
Max
Unit
t116
Data Delay (bit 0 only) (low to valid)
--
35
ns
t117
Data Disable Delay (high to 3-state)
--
30
ns
t120
DOEN Valid Delay (high to valid)
--
25
ns
t121
Address Delay (bit 0 only) (low to valid)
--
35
ns
t122
Address Disable Delay (high to 3-state)
--
30
ns
OCK/ICK
B0
B15
B8
B7
B1
B0
B15
SYNC
V
IH
V
IL
DO/D1
V
OH
V
OL
DOEN
V
OH
V
OL
t112
t113
t112
t113
TIME SLOT 1
TIME SLOT 2
t117
t116
AD0
AS7
AS0
AD7
AD1
AD0
SADD
t122
t121
t114
t115
t120
t120
*
5-4799 (F)
Data Sheet
January 2002
DSP1629 Digital Signal Processor
Agere Systems Inc.
99
11 Timing Characteristics for 2.7 V Operation
The following timing characteristics and requirements are preliminary information and are subject to change. Timing
characteristics refer to the behavior of the device under specified conditions. Timing requirements refer to conditions
imposed on the user for proper operation of the device. All timing data is valid for the following conditions:
T
A
= 40
C to +85
C (See Section 8.3, Recommended Operating Conditions.)
V
DD
= 3 V
10%, V
SS
= 0 V (See Section 8.3, Recommended Operating Conditions.)
Capacitance load on outputs (C
L
) = 50 pF, except for CKO, where C
L
= 20 pF.
Output characteristics can be derated as a function of load capacitance (C
L
).
All outputs: 0.03 ns/pF
dt/dC
L
0.07 ns/pF for 10
C
L
100 pF at V
IH
for rising edge and at V
IL
for falling edge.
For example, if the actual load capacitance is 30 pF instead of 50 pF, the derating for a rising edge is (30 50) pF
x 0.06 ns/pF = 1.2 ns less than the specified rise time or delay that includes a rise time.
Test conditions for inputs:
s
Rise and fall times of 4 ns or less
s
Timing reference levels for delays = V
IH
, V
IL
Test conditions for outputs (unless noted otherwise):
s
C
LOAD
= 50 pF; except for CKO, where C
LOAD
= 20 pF
s
Timing reference levels for delays = V
IH
, V
IL
s
3-state delays measured to the high-impedance state of the output driver
For the timing diagrams, see Table 62, Electrical Requirements for Mask-Programmable Input Clock Options, for
input clock requirements.
Unless otherwise noted, CKO in the timing diagrams is the free-running CKO.
Data Sheet
DSP1629 Digital Signal Processor
January 2002
100
Agere Systems Inc.
11 Timing Characteristics for 2.7 V Operation
(continued)
11.1 DSP Clock Generation (2.7 V Operation)
*
See Table 62, Electrical Requirements for Mask-Programmable Input Clock Options, for input clock electrical requirements.
Free-running clock.
Wait-stated clock (see Table 38, ioc Register).
W = number of wait-states.
Figure 36. I/O Clock Timing Diagram (2.7 V Operation)
Device speeds greater than 50 MIPS do not support 1X operation. Use the PLL.
Device is fully static, t1 is tested at 100 ns for 1X input clock option, and memory hold time is tested at 0.1 s.
T = internal clock period, set by CKI or by CKI and the PLL parameters.
Table 106. Timing Requirements for Input Clock (2.7 V Operation)
Abbreviated Reference
Parameter
19.2 ns and 12.5 ns
Min
Max
Unit
t1
Clock In Period (high to high)
20
--
ns
t2
Clock In Low Time (low to high)
10
--
ns
t3
Clock In High Time (high to low)
10
--
ns
Table 107. Timing Characteristics for Input Clock and Output Clock (2.7 V Operation)
Abbreviated Reference
Parameter
19.2 ns
12.5 ns
Unit
Min
Max
Min
Max
t4
Clock Out High Delay
--
14
--
10
ns
t5
Clock Out Low Delay (high to low)
--
14
--
10
ns
t6
Clock Out Period (low to low)
T
--
T
--
ns
t6a
Clock Out Period with SLOWCKI Bit Set
in powerc Register (low to low)
0.74
3.8
0.74
3.8
s
5-4009 (F).a
t4
t1
t2
1X CKI*
t5
CKO
t3
t6, t6a
CKO
EXTERNAL MEMORY CYCLE
W = 1
Data Sheet
January 2002
DSP1629 Digital Signal Processor
Agere Systems Inc.
101
11 Timing Characteristics for 2.7 V Operation
(continued)
11.2 Reset Circuit (2.7 V Operation)
The DSP1629 has two external reset pins: RSTB and TRST. At initial powerup, or if the supply voltage falls below
V
DD
MIN* and a device reset is required, both TRST and RSTB must be asserted to initialize the device. Figure 37,
Powerup Reset and Chip Reset Timing Diagram (2.7 V Operation), shows two separate events:
s
Chip reset at initial powerup.
s
Chip reset following a drop in power supply.
Note: The TRST pin must be asserted even if the JTAG controller is not used by the application.
*
See Table 60, Recommended Operating Conditions.
*
When both INT0 and RSTB are asserted, all output and bidirectional pins (except TDO, which 3-states by JTAG control) are put in a 3-state
condition. With RSTB asserted and INT0 not asserted, EROM, ERAMHI, ERAMLO, IO, and RWN outputs remain high, and CKO remains a
free-running clock.
See Table 62, Electrical Requirements for Mask-Programmable Input Clock Options, for input clock electrical requirements.
Figure 37. Powerup Reset and Chip Reset Timing Diagram (2.7 V Operation)
Note: The device needs to be clocked for at least six CKI cycles during reset after powerup. Otherwise, high currents may flow.
Table 108. Timing Requirements for Powerup Reset and Chip Reset (2.7 V Operation)
Abbreviated Reference
Parameter
Min
Max
Unit
t8
RSTB and TRST Reset Pulse (low to high)
6T
--
ns
t9
V
DD
Ramp
--
10
ms
t146
V
DD
MIN to RSTB Low:
CMOS
Small-signal
2T
20
--
--
ns
s
t153
RSTB (low to high)
--
54
ns
Table 109. Timing Characteristics for Powerup Reset and Chip Reset (2.7 V Operation)
Abbreviated Reference
Parameter
Min
Max
Unit
t10
RSTB Disable Time (low to 3-state)
--
100
ns
t11
RSTB Enable Time (high to valid)
--
100
ns
V
DD
RAMP
RSTB,
TRST
OUTPUT
PINS*
CKI
t11
V
OH
V
OL
V
IH
V
IL
t9
t146
t10
0.4 V
V
DD
MIN
t11
V
DD
MIN
0.4 V
t10
t9
t146
t153
t8
t153
t8
5-4010 (F).a
Data Sheet
DSP1629 Digital Signal Processor
January 2002
102
Agere Systems Inc.
11 Timing Characteristics for 2.7 V Operation
(continued)
11.3 Reset Synchronization (2.7 V Operation)
*
See Table 62, Electrical Requirements for Mask-Programmable Input Clock Options, for input clock electrical requirements.
Notes:
CKO
1
and CKO
2
are two possible CKO states before reset. CKO is free-running.
If the rising edge of RSTB (low to high) is captured instead by the falling edge of CKO (high to low), CKO and CKI will be in-phase at t5 + 2 x t6.
Figure 38. Reset Synchronization Timing (2.7 V Operation)
Table 110. Timing Requirements for Reset Synchronization Timing (2.7 V Operation)
Abbreviated Reference
Parameter
Min
Max
Unit
t126
Reset Setup (high to high)
3
T/2 1
ns
5-4011 (F).a
CKI
*
V
IH
V
IL
t126
t5 + 2 x t6
RSTB
V
IH
V
IL
V
IH
V
IL
CKO
V
IH
V
IL
CKO
Data Sheet
January 2002
DSP1629 Digital Signal Processor
Agere Systems Inc.
103
11 Timing Characteristics for 2.7 V Operation
(continued)
11.4 JTAG I/O Specifications (2.7 V Operation)
Figure 39. JTAG Timing Diagram (2.7 V Operation)
Table 111. Timing Requirements for JTAG Input/Output (2.7 V Operation)
Abbreviated Reference
Parameter
Min
Max
Unit
t12
TCK Period (high to high)
50
--
ns
t13
TCK High Time (high to low)
22.5
--
ns
t14
TCK Low Transition Time (low to high)
22.5
--
ns
t155
TCK Rise Transition Time (low to high)
0.6
--
V/ns
t156
TCK Fall Transition Time (high to low)
0.6
--
V/ns
t15
TMS Setup Time (valid to high)
7.5
--
ns
t16
TMS Hold Time (high to invalid)
2
--
ns
t17
TDI Setup Time (valid to high)
7.5
--
ns
t18
TDI Hold Time (high to invalid)
2
--
ns
Table 112. Timing Characteristics for JTAG Input/Output (2.7 V Operation)
Abbreviated Reference
Parameter
Min
Max
Unit
t19
TDO Delay (low to valid)
--
19
ns
t20
TDO Hold (low to invalid)
0
--
ns
t12
t14
t13
t15
t16
t17
t18
t19
t20
TCK
TMS
TDI
TDO
V
IH
V
IL
V
IH
V
IL
V
IH
V
IL
V
OH
V
OL
t155
t156
5-4017 (F)
Data Sheet
DSP1629 Digital Signal Processor
January 2002
104
Agere Systems Inc.
11 Timing Characteristics for 2.7 V Operation
(continued)
11.5 Interrupt (2.7 V Operation)
*
CKO is free-running.
IACK assertion is guaranteed to be enclosed by VEC[3:0] assertion.
Figure 40. Interrupt Timing Diagram (2.7 V Operation)
Note: Interrupt is asserted during an interruptible instruction and no other pending interrupts.
Note: Interrupt is asserted during an interruptible instruction and no other pending interrupts.
Table 113. Timing Requirements for Interrupt (2.7 V Operation)
Abbreviated Reference
Parameter
Min
Max
Unit
t21
Interrupt Setup (high to low)
19
--
ns
t22
INT Assertion Time (high to low)
2T
--
ns
Table 114. Timing Characteristics for Interrupt (2.7 V Operation)
Abbreviated Reference
Parameter
Min
Max
Unit
t23
IACK Assertion Time (low to high)
--
T/2 + 10
ns
t24
VEC Assertion Time (low to high)
--
12.5
ns
t25
IACK Invalid Time (low to low)
--
10
ns
t26
VEC Invalid Time (low to low)
--
12.5
ns
5-4018 (F)
CKO
*
INT[1:0]
t21
V
OH
V
OL
V
IH
V
IL
t22
IACK
V
OH
V
OL
VEC[3:0]
V
OH
V
OL
t23
t24
t25
t26
Data Sheet
January 2002
DSP1629 Digital Signal Processor
Agere Systems Inc.
105
11 Timing Characteristics for 2.7 V Operation
(continued)
11.6 Bit Input/Output (BIO) (2.7 V Operation)
Figure 41. Write Outputs Followed by Read Inputs (cbit = Immediate; a1 = sbit) (2.7 V Operation)
Figure 42. Write Outputs and Test Inputs (cbit = Immediate) (2.7 V Operation)
Table 115. Timing Requirements for BIO Input Read (2.7 V Operation)
Abbreviated Reference
Parameter
Min
Max
Unit
t27
IOBIT Input Setup Time (valid to high)
15
--
ns
t28
IOBIT Input Hold Time (high to invalid)
0
--
ns
Table 116. Timing Characteristics for BIO Output (2.7 V Operation)
Abbreviated Reference
Parameter
Min
Max
Unit
t29
IOBIT Output Valid Time (low to valid)
--
9
ns
t144
IOBIT Output Hold Time (low to invalid)
1
--
ns
Table 117. Timing Requirements for BIO Input Test (2.7 V Operation)
Abbreviated Reference
Parameter
Min
Max
Unit
t141
IOBIT Input Setup Time (valid to low)
15
--
ns
t142
IOBIT Input Hold Time (low to invalid)
0
--
ns
5-4019 (F).a
CKO
IOBIT
(INPUT)
t28
t27
VALID OUTPUT
V
I
H
V
I
L
V
O
H
V
O
L
V
O
H
V
O
L
DATA INPUT
t29
t144
IOBIT
(OUTPUT)
5-4019 (F).b
CKO
IOBIT
(INPUT)
t142
t141
VALID OUTPUT
V
OH
V
O
L
TEST INPUT
t29
t144
IOBIT
(OUTPUT)
V
OH
V
O
L
V
IH
V
I
L
Data Sheet
DSP1629 Digital Signal Processor
January 2002
106
Agere Systems Inc.
11 Timing Characteristics for 2.7 V Operation
(continued)
11.7 External Memory Interface (2.7 V Operation)
The following timing diagrams, characteristics, and requirements do not apply to interactions with delayed external
memory enables unless so stated. See the
DSP1611/17/18/27/28/29 Digital Signal Processor
Information Manual
for a detailed description of the external memory interface, including other functional diagrams.
*
W = number of wait-states.
Figure 43. Enable Transition Timing (2.7 V Operation)
Table 118. Timing Characteristics for External Memory Enables (EROM, ERAMHI, IO, ERAMLO) (2.7 V Oper-
ation)
Abbreviated Reference
Parameter
Min
Max
Unit
t33
CKO to ENABLE Active (low to low)
0
5
ns
t34
CKO to ENABLE Inactive (low to high)
1
4.5
ns
Table 119. Timing Characteristics for Delayed External Memory Enables (ioc = 0x000F) (2.7 V Operation)
Abbreviated Reference
Parameter
Min
Max
Unit
t33
CKO to Delayed ENABLE Active (low to low)
T/2
T/2 + 7
ns
CKO
ENABLE
t34
t33
W
*
= 0
V
OH
V
OL
V
OH
V
OL
5-4020 (F).b
Data Sheet
January 2002
DSP1629 Digital Signal Processor
Agere Systems Inc.
107
11 Timing Characteristics for 2.7 V Operation
(continued)
*
W = number of wait-states.
Figure 44. External Memory Data Read Timing Diagram (2.7 V Operation)
Table 120. Timing Characteristics for External Memory Access (2.7 V Operation)
Abbreviated Reference
Parameter
Min
Max
Unit
t127
Enable Width (low to high)
T(1 + W) 1.5
--
ns
t128
Address Valid (enable low to valid)
--
2.5
ns
Table 121. Timing Requirements for External Memory Read (EROM, ERAMHI, IO, ERAMLO) (2.7 V Operation)
Abbreviated
Reference
Parameter
19.2 ns
12.5 ns
Unit
Min
Max
Min
Max
t129
Read Data Setup (valid to enable high)
15
--
13
--
ns
t130
Read Data Hold (enable high to hold)
0
--
0
--
ns
t150
External Memory Access Time (valid to valid)
--
T(1 + W) 15
--
T(1 + W) 14
ns
V
IH
V
IL
DB
CKO
AB
V
OH
V
OL
t128
READ ADDRESS
ENABLE
V
OH
V
OL
V
OH
V
OL
(MWAIT = 0 x 2222)
W* = 2
t127
t129
t130
READ DATA
t150
5-4021 (F).a
Data Sheet
DSP1629 Digital Signal Processor
January 2002
108
Agere Systems Inc.
11 Timing Characteristics for 2.7 V Operation
(continued)
*
W = number of wait-states.
Figure 45. External Memory Data Write Timing Diagram (2.7 V Operation)
Table 122. Timing Characteristics for External Memory Data Write (All Enables) (2.7 V Operation)
Abbreviated
Reference
Parameter
19.2 ns
12.5 ns
Unit
Min
Max
Min
Max
t131
Write Overlap (enable low to 3-state)
--
0
--
0
ns
t132
RWN Advance (RWN high to enable high)
0
--
0
--
ns
t133
RWN Delay (enable low to RWN low)
0
--
0
--
ns
t134
Write Data Setup (data valid to RWN high)
T(1 + W)/2 4
--
T(1 + W)/2 3
--
ns
t135
RWN Width (low to high)
T(1 + W) 5
--
T(1 + W) 4
--
ns
t136
Write Address Setup (address valid to RWN low)
0
--
0
--
ns
ERAMLO
EROM
CKO
AB
RWN
DB
WRITE ADDRESS
READ ADDRESS
V
OH
V
OL
V
OH
V
OL
V
OH
V
OL
V
OH
V
OL
V
OH
V
OL
WRITE DATA
READ
W* = 1
t131
t132
t134
t133
t135
t136
(MWAIT = 0x1002)
W* = 2
V
OH
V
OL
5-4022 (F).a
Data Sheet
January 2002
DSP1629 Digital Signal Processor
Agere Systems Inc.
109
11 Timing Characteristics for 2.7 V Operation
(continued)
*
W = number of wait-states.
Figure 46. Write Cycle Followed by Read Cycle (2.7 V Operation)
Table 123. Timing Characteristics for Write Cycle Followed by Read Cycle (2.7 V Operation)
Abbreviated Reference
Parameter
Min
Max
Unit
t131
Write Overlap (enable low to 3-state)
--
0
ns
t137
Write Data 3-state (RWN high to 3-state)
--
2
ns
t138
Write Data Hold (RWN high to data hold)
0
--
ns
t139
Write Address Hold (RWN high to address hold)
0
--
ns
ERAMLO
CKO
AB
RWN
WRITE ADDRESS
READ ADDRESS
V
OH
V
OL
V
OH
V
OL
V
OH
V
OL
V
OH
V
OL
W* = 1
t137
(MWAIT = 0x1002)
W* = 2
EROM
V
OH
V
OL
DB
WRITE
READ
V
OH
V
OL
t138
t139
t131
5-4023 (F).a
Data Sheet
DSP1629 Digital Signal Processor
January 2002
110
Agere Systems Inc.
11 Timing Characteristics for 2.7 V Operation
(continued)
11.8 PHIF Specifications (2.7 V Operation)
For the PHIF, read means read by the external user (output by the DSP); write is similarly defined. The 8-bit reads/
writes are identical to one-half of a 16-bit access.
Figure 47. PHIF
Intel
Mode Signaling (Read and Write) Timing Diagram (2.7 V Operation)
*
This timing diagram for the PHIF port shows accesses using the PCSN signal to initiate and complete a transaction. The transactions can
also be initiated and completed with the PIDS and PODS signals. An output transaction (read) is initiated by PCSN or PODS going low, which-
ever comes last. For example, the timing requirements referenced to PCSN going low, t45 and t49, should be referenced to PODS going low,
if PODS goes low after PCSN. An output transaction is completed by PCSN or PODS going high, whichever comes first. An input transaction
is initiated by PCSN or PIDS going low, whichever comes last. An input transaction is completed by PCSN or PIDS going high, whichever
comes first. All requirements referenced to PCSN apply to PIDS or PODS, if PIDS or PODS is the controlling signal.
*
This timing diagram for the PHIF port shows accesses using the PCSN signal to initiate and complete a transaction. The transactions can
also be initiated and completed with the PIDS and PODS signals. An output transaction (read) is initiated by PCSN or PODS going low, which-
ever comes last. For example, the timing requirements referenced to PCSN going low, t45 and t49, should be referenced to PODS going low,
if PODS goes low after PCSN. An output transaction is completed by PCSN or PODS going high, whichever comes first. An input transaction
is initiated by PCSN or PIDS going low, whichever comes last. An input transaction is completed by PCSN or PIDS going high, whichever
comes first. All requirements referenced to PCSN apply to PIDS or PODS, if PIDS or PODS is the controlling signal.
Table 124. Timing Requirements for PHIF
Intel Mode Signaling
(2.7 V Operation)
Abbreviated Reference
Parameter
Min
Max
Unit
t41
PODS to PCSN Setup (low to low)
0
--
ns
t42
PCSN to PODS Hold (high to high)
0
--
ns
t43
PIDS to PCSN Setup (low to low)
0
--
ns
t44
PCSN to PIDS Hold (high to high)
0
--
ns
t45*
PSTAT to PCSN Setup (valid to low)
4
--
ns
t46*
PCSN to PSTAT Hold (high to invalid)
0
--
ns
t47*
PBSEL to PCSN Setup (valid to low)
6
--
ns
t48*
PCSN to PBSEL Hold (high to invalid)
0
--
ns
t51*
PB Write to PCSN Setup (valid to high)
10
--
ns
t52*
PCSN to PB Write Hold (high to invalid)
4
--
ns
Table 125. Timing Characteristics for PHIF
Intel Mode Signaling
(2.7 V Operation)
Abbreviated Reference
Parameter
Min
Max
Unit
t49*
PCSN to PB Read (low to valid)
--
12
ns
t50*
PCSN to PB Read Hold (high to invalid)
0
--
ns
t154
PCSN to PB Read 3-state (high to 3-state)
--
8
ns
5-4036 (F)
PCSN
t41
t42
t43
t45
t46
t49
t50
16-bit READ
16-bit WRITE
PODS
PIDS
PBSEL
PSTAT
PB[7:0]
t47
t51
t52
t48
t44
t154
V
IH
V
IL
V
IH
V
IL
V
IH
V
IL
V
IH
V
IL
V
IH
V
IL
V
IH
V
IL
Data Sheet
January 2002
DSP1629 Digital Signal Processor
Agere Systems Inc.
111
11 Timing Characteristics for 2.7 V Operation
(continued)
Figure 48. PHIF
Intel
Mode Signaling (Pulse Period and Flags) Timing Diagram (2.7 V Operation)
*
t53 should be referenced to the rising edge of PCSN or PODS, whichever comes first.
t54 should be referenced to the rising edge of
PCSN or PIDS, whichever comes first.
POBE and PIBF may be programmed to be the opposite logic levels shown in the diagram (positive assertion levels shown). t53 and
t54 apply to the inverted levels as well as those shown.
Table 126. Timing Requirements for PHIF
Intel
Mode Signaling (2.7 V Operation)
Abbreviated Reference
Parameter
Min
Max
Unit
t55
PCSN/PODS/PIDS Pulse Width (high to low)
20.5
--
ns
t56
PCSN/PODS/PIDS Pulse Width (low to high)
20.5
--
ns
Table 127. Timing Characteristics for PHIF
Intel
Mode Signaling (2.7 V Operation)
Abbreviated Reference
Parameter
Min
Max
Unit
t53*
PCSN/PODS to POBE
(high to high)
--
17
ns
t54*
PCSN/PIDS to PIBF
(high to high)
--
17
ns
PODS
PIDS
V
IH
V
IL
V
IH
V
IL
V
IH
V
IL
t55
t56
t55
t56
t55
t56
PCSN
t53
t54
16-bit READ
8-bit WRITE
PBSEL
POBE
PIBF
t54
V
OH
V
OL
V
OH
V
OL
V
OH
V
OL
t56
t56
t55
t53
8-bit READ
16-bit WRITE
5-4037 (F).a
Data Sheet
DSP1629 Digital Signal Processor
January 2002
112
Agere Systems Inc.
11 Timing Characteristics for 2.7 V Operation
(continued)
Figure 49. PHIF
Motorola
Mode Signaling (Read and Write) Timing Diagram (2.7 V Operation)
*
This timing diagram for the PHIF port shows accesses using the PCSN signal to initiate and complete a transaction. The transactions can
also be initiated and completed with the PDS signal. An input/output transaction is initiated by PCSN or PDS going low, whichever comes last.
For example, the timing requirements referenced to PCSN going low, t45 and t49, should be referenced to PDS going low, if PDS goes low
after PCSN. An input/output transaction is completed by PCSN or PDS going high, whichever comes first. All requirements referenced to
PCSN should be referenced to PDS, if PDS is the controlling signal. PRWN should never be used to initiate or complete a transaction.
PDS is programmable to be active-high or active-low. It is shown active-low in Figures 49 and 50. POBE and PIBF may be programmed to
be the opposite logic levels shown in the diagram. t53 and t54 apply to the inverted levels as well as those shown.
*
This timing diagram for the PHIF port shows accesses using the PCSN signal to initiate and complete a transaction. The transactions can
also be initiated and completed with the PDS signal. An input/output transaction is initiated by PCSN or PDS going low, whichever comes last.
For example, the timing requirements referenced to PCSN going low, t45 and t49, should be referenced to PDS going low, if PDS goes low
after PCSN. An input/output transaction is completed by PCSN or PDS going high, whichever comes first. All requirements referenced to
PCSN should be referenced to PDS, if PDS is the controlling signal. PRWN should never be used to initiate or complete a transaction.
Table 128. Timing Requirements for PHIF
Motorola Mode Signaling
(2.7 V Operation)
Abbreviated Reference
Parameter
Min
Max
Unit
t41
PDS
to PCSN Setup (valid to low)
0
--
ns
t42
PCSN to PDS
Hold (high to invalid)
0
--
ns
t43
PRWN to PCSN Setup (valid to low)
4
--
ns
t44
PCSN to PRWN Hold (high to invalid)
0
--
ns
t45*
PSTAT to PCSN Setup (valid to low)
4
--
ns
t46*
PCSN to PSTAT Hold (high to invalid)
0
--
ns
t47*
PBSEL to PCSN Setup (valid to low)
6
--
ns
t48*
PCSN to PBSEL Hold (high to invalid)
0
--
ns
t51*
PB Write to PCSN Setup (valid to high)
10
--
ns
t52*
PCSN to PB Write Hold (high to invalid)
4
--
ns
Table 129. Timing Characteristics for PHIF
Motorola Mode Signaling
(2.7 V Operation)
Abbreviated Reference
Parameter
Min
Max
Unit
t49*
PCSN to PB Read (low to valid)
--
12
ns
t50*
PCSN to PB Read Hold (high to invalid)
0
--
ns
t154
PCSN to PB Read 3-state (high to 3-state)
--
8
ns
PCSN
PDS
PRWN
PBSEL
PSTAT
PB[7:0]
t41
t42
t43
t44
t45
t46
t47
t48
t52
t51
t50
t49
16-bit READ
16-bit WRITE
t43
t44
V
I H
V
IL
V
I H
V
IL
V
I H
V
IL
V
I H
V
IL
V
I H
V
IL
t154
5-4038 (F).a
Data Sheet
January 2002
DSP1629 Digital Signal Processor
Agere Systems Inc.
113
11 Timing Characteristics for 2.7 V Operation
(continued)
Figure 50. PHIF
Motorola
Mode Signaling (Pulse Period and Flags) Timing Diagram (2.7 V Operation)
* An input/output transaction is initiated by PCSN or PDS going low, whichever comes last. For example, t53 and t54 should be referenced
to PDS going low, if PDS goes low after PCSN. An input/output transaction is completed by PCSN or PDS going high, whichever comes first.
All requirements referenced to PCSN should be referenced to PDS, if PDS is the controlling signal. PRWN should never be used to initiate or
complete a transaction.
PDS is programmable to be active-high or active-low. It is shown active-low in Figures 49 and 50. POBE and PIBF may be programmed to
be the opposite logic levels shown in the diagram. t53 and t54 apply to the inverted levels as well as those shown.
Table 130. Timing Characteristics for PHIF
Motorola
Mode Signaling (2.7 V Operation)
Abbreviated Reference
Parameter
Min
Max
Unit
t53*
PCSN/PDS
to POBE
(high to high)
--
17
ns
t54*
PCSN/PDS
to PIBF
(high to high)
--
17
ns
Table 131. Timing Requirements for PHIF
Motorola
Mode Signaling (2.7 V Operation)
Abbreviated Reference
Parameter
Min
Max
Unit
t55
PCSN/PDS/PRWN Pulse Width (high to low)
20
--
ns
t56
PCSN/PDS/PRWN Pulse Width (low to high)
20
--
ns
PDS
PRWN
V
IH
t55
t56
t55
t56
t55
t56
PCSN
t53
t54
16-bit READ
8-bit WRITE
PBSEL
POBE
PIBF
t54
t56
t56
t55
t53
8-bit READ
16-bit WRITE
V
IL
V
IH
V
IL
V
IH
V
IL
V
OH
V
OL
V
OH
V
OL
V
OH
V
OL
5-4039 (F).a
Data Sheet
DSP1629 Digital Signal Processor
January 2002
114
Agere Systems Inc.
11 Timing Characteristics for 2.7 V Operation
(continued)
*
Motorola
mode signal name.
Figure 51. PHIF
Intel
or
Motorola
Mode Signaling (Status Register Read) Timing Diagram (2.7 V Operation)
t45, t47, and t49 are referenced to the falling edge of PCSN or PODS(PDS), whichever occurs last.
t46, t48, and t50 are referenced to the rising edge of PCSN or PODS(PDS), whichever occurs first.
t45, t47, and t49 are referenced to the falling edge of PCSN or PODS(PDS), whichever occurs last.
t46, t48, and t50 are referenced to the rising edge of PCSN or PODS(PDS), whichever occurs first.
Table 132. Timing Requirements for
Intel
and
Motorola
Mode Signaling (Status Register Read) (2.7 V Oper-
ation)
Abbreviated Reference
Parameter
Min
Max
Unit
t45
PSTAT to PCSN Setup (valid to low)
4
--
ns
t46
PCSN to PSTAT Hold (high to invalid)
0
--
ns
t47
PBSEL to PCSN Setup (valid to low)
6
--
ns
t48
PCSN to PBSEL Hold (high to invalid)
0
--
ns
Table 133. Timing Characteristics for
Intel
and
Motorola
Mode Signaling (Status Register Read) (2.7 V Op-
eration)
Abbreviated Reference
Parameter
Min
Max
Unit
t49
PCSN to PB Read (low to valid)
--
12
ns
t50
PCSN to PB Read Hold (high to invalid)
0
--
ns
t154
PCSN to PB Read 3-state (high to 3-state)
--
8
ns
PCSN
PODS (PDS*)
PIDS (PRWN*)
PBSEL
PSTAT
PB[7:0]
t47
t48
t45
t46
t49
t50
V
IH
--
V
IL
--
V
OH
--
V
OL
--
V
IH
--
V
IL
--
V
IH
--
V
IL
--
V
IH
--
V
IL
--
V
IH
--
V
IL
--
5-4040 (F).a
t154
Data Sheet
January 2002
DSP1629 Digital Signal Processor
Agere Systems Inc.
115
11 Timing Characteristics for 2.7 V Operation
(continued)
Figure 52. PHIF, PIBF, and POBE Reset Timing Diagram (2.7 V Operation)
*
After reset, POBE and PIBF always go to the levels shown, indicating output buffer empty and input buffer empty. The DSP program, however,
may later invert the definition of the logic levels for POBE and PIBF. t57 and t58 continue to apply.
POBE and PIBF can be programmed to be active-high or active-low. They are shown active-high. The timing characteristic for active-low is
the same as for active-high
.
Figure 53. PHIF, PIBF, and POBE Disable Timing Diagram (2.7 V Operation)
Table 134. PHIF Timing Characteristics for PHIF, PIBF, and POBE Reset (2.7 V Operation)
Abbreviated Reference
Parameter
Min
Max
Unit
t57
RSTB Disable to POBE/PIBF* (high to valid)
--
25
ns
t58
RSTB Enable to POBE/PIBF* (low to invalid)
3
25
ns
Table 135. PHIF Timing Characteristics for POBE and PIBF Disable (2.7 V Operation)
Abbreviated Reference
Parameter
Min
Max
Unit
t59
CKO to POBE/PIBF Disable (high/low to disable)
--
20
ns
RSTB
V
IH
t58
t57
V
IL
POBE
V
OH
V
OL
PIBF
V
OH
V
OL
5-4775 (F)
CKO
V
IH
V
IL
t59
t59
POBE
V
OH
V
OL
PIBF
V
OH
V
OL
5-4776 (F)
Data Sheet
DSP1629 Digital Signal Processor
January 2002
116
Agere Systems Inc.
11 Timing Characteristics for 2.7 V Operation
(continued)
11.9 Serial I/O Specifications (2.7 V Operation)
*
N = 16 bits or 8 bits.
Figure 54. SIO Passive Mode Input Timing Diagram (2.7 V Operation)
For multiprocessor mode, see note in Section 11.10, Multiprocessor Communication (2.7 V Operation).
Device is fully static; t70 is tested at 200 ns.
Table 136. Timing Requirements for Serial Inputs (2.7 V Operation)
Abbreviated Reference
Parameter
Min
Max
Unit
t70
Clock Period (high to high)
40
--
ns
t71
Clock Low Time (low to high)
18
--
ns
t72
Clock High Time (high to low)
18
--
ns
t73
Load High Setup (high to high)
8
--
ns
t74
Load Low Setup (low to high)
8
--
ns
t75
Load High Hold (high to invalid)
0
--
ns
t77
Data Setup (valid to high)
7
--
ns
t78
Data Hold (high to invalid)
0
--
ns
Table 137. Timing Characteristics for Serial Outputs (2.7 V Operation)
Abbreviated Reference
Parameter
Min
Max
Unit
t79
IBF Delay (high to high)
--
35
ns
IBF
V
OH
V
OL
DI
V
IH
V
IL
ILD
V
IH
V
IL
ICK
V
IH
V
IL
BN 1*
B0
t77
t78
B0
B1
t79
t72
t71
t70
t75
t74
t75
t73
5-4777 (F)
Data Sheet
January 2002
DSP1629 Digital Signal Processor
Agere Systems Inc.
117
11 Timing Characteristics for 2.7 V Operation
(continued)
*
ILD goes high during bit 6 (of 0:15), N = 8 or 16.
Figure 55. SIO Active Mode Input Timing Diagram (2.7 V Operation)
Table 138. Timing Requirements for Serial Inputs (2.7 V Operation)
Abbreviated Reference
Parameter
Min
Max
Unit
t77
Data Setup (valid to high)
7
--
ns
t78
Data Hold (high to invalid)
0
--
ns
Table 139. Timing Characteristics for Serial Outputs (2.7 V Operation)
Abbreviated Reference
Parameter
Min
Max
Unit
t76a
ILD Delay (high to low)
--
35
ns
t101
ILD Hold (high to invalid)
3
--
ns
t79
IBF Delay (high to high)
--
35
ns
IBF
V
OH
V
OL
DI
V
IH
V
IL
ILD
V
OH
V
OL
ICK
V
OH
V
OL
BN 1
B0
t77
t78
B0
B1
t79
t101
t76a
*
5-4778 (F)
Data Sheet
DSP1629 Digital Signal Processor
January 2002
118
Agere Systems Inc.
11 Timing Characteristics for 2.7 V Operation
(continued)
*
See sioc register, MSB field, to determine if B0 is the MSB or LSB. See sioc register, ILEN field, to determine if the DO word length is 8 bits
or 16 bits.
Figure 56. SIO Passive Mode Output Timing Diagram (2.7 V Operation)
For multiprocessor mode, see note in Section 11.10, Multiprocessor Communication (2.7 V Operation).
Device is fully static; t80 is tested at 200 ns.
Table 140. Timing Requirements for Serial Inputs (2.7 V Operation)
Abbreviated Reference
Parameter
Min
Max
Unit
t80
Clock Period (high to high)
40
--
ns
t81
Clock Low Time (low to high)
18
--
ns
t82
Clock High Time (high to low)
18
--
ns
t83
Load High Setup (high to high)
8
--
ns
t84
Load Low Setup (low to high)
8
--
ns
t85
Load Hold (high to invalid)
0
--
ns
Table 141. Timing Characteristics for Serial Outputs (2.7 V Operation)
Abbreviated Reference
Parameter
Min
Max
Unit
t87
Data Delay (high to valid)
--
35
ns
t88
Enable Data Delay (low to active)
--
35
ns
t89
Disable Data Delay (high to 3-state)
--
35
ns
t90
Data Hold (high to invalid)
3
--
ns
t92
Address Delay (high to valid)
--
35
ns
t93
Address Hold (high to invalid)
3
--
ns
t94
Enable Delay (low to active)
--
35
ns
t95
Disable Delay (high to 3-state)
--
35
ns
t96
OBE Delay (high to high)
--
35
ns
DOEN
V
IH
V
IL
SADD
V
OH
V
OL
OLD
V
IH
V
IL
OCK
V
IH
V
IL
t85
t80
t81
t82
t84
t83
t85
t88
B0
B1
B7
BN 1
t90
t90
t87
t94
AD0
AD1
AD7
t93
t93
t92
AS7
t89
t95
OBE
V
OH
V
OL
DO*
V
OH
V
OL
t96
5-4796 (F)
Data Sheet
January 2002
DSP1629 Digital Signal Processor
Agere Systems Inc.
119
11 Timing Characteristics for 2.7 V Operation
(continued)
*
OLD goes high at the end of bit 6 of 0:15.
Figure 57. SIO Active Mode Output Timing Diagram (2.7 V Operation)
Table 142. Timing Characteristics for Serial Output (2.7 V Operation)
Abbreviated Reference
Parameter
Min
Max
Unit
t86a
OLD Delay (high to low)
--
35
ns
t102
OLD Hold (high to invalid)
3
--
ns
t87
Data Delay (high to valid)
--
35
ns
t88
Enable Data Delay (low to active)
--
35
ns
t89
Disable Data Delay (high to 3-state)
--
35
ns
t90
Data Hold (high to invalid)
3
--
ns
t92
Address Delay (high to valid)
--
35
ns
t93
Address Hold (high to invalid)
3
--
ns
t94
Enable Delay (low to active)
--
35
ns
t95
Disable Delay (high to 3-state)
--
35
ns
t96
OBE Delay (high to high)
--
35
ns
DOEN
V
IH
V
IL
SADD
V
OH
V
OL
OLD
V
OH
V
OL
OCK
V
OH
V
OL
t102
t86a
t88
B0
B1
B7
BN 1
t90
t90
t87
t94
AD0
AD1
AD7
t93
t93
t92
AS7
t89
t95
OBE
V
OH
V
OL
DO
V
OH
V
OL
t96
*
5-4797 (F)
Data Sheet
DSP1629 Digital Signal Processor
January 2002
120
Agere Systems Inc.
11 Timing Characteristics for 2.7 V Operation
(continued)
*
See sioc register, LD field.
Figure 58. Serial I/O Active Mode Clock Timing (2.7 V Operation)
Table 143. Timing Characteristics for Signal Generation (2.7 V Operation)
Abbreviated Reference
Parameter
Min
Max
Unit
t97
ICK Delay (high to high)
--
18
ns
t98
ICK Delay (high to low)
--
18
ns
t99
OCK Delay (high to high)
--
18
ns
t100
OCK Delay (high to low)
--
18
ns
t76a
ILD Delay (high to low)
--
35
ns
t76b
ILD Delay (high to high)
--
35
ns
t101
ILD Hold (high to invalid)
3
--
ns
t86a
OLD Delay (high to low)
--
35
ns
t86b
OLD Delay (high to high)
--
35
ns
t102
OLD Hold (high to invalid)
3
--
ns
t103
SYNC Delay (high to low)
--
35
ns
t104
SYNC Delay (high to high)
--
35
ns
t105
SYNC Hold (high to invalid)
3
--
ns
ICK
V
OH
V
OL
CKO
V
OH
V
OL
t97
OCK
V
OH
V
OL
ICK/OCK*
V
OH
ILD
V
OH
V
OL
OLD
V
OH
V
OL
SYNC
V
OH
V
OL
t99
t98
t100
t101
t76a
t101
t76b
t102
t86a
t102
t86b
t105
t103
t105
t104
5-4798 (F)
Data Sheet
January 2002
DSP1629 Digital Signal Processor
Agere Systems Inc.
121
11 Timing Characteristics for 2.7 V Operation
(continued)
11.10 Multiprocessor Communication (2.7 V Operation)
*
Negative edge initiates time slot 0.
Figure 59. SIO Multiprocessor Timing Diagram (2.7 V Operation)
Note: All serial I/O timing requirements and characteristics still apply, but the minimum clock period in passive
multiprocessor mode, assuming 50% duty cycle, is calculated as (t77 + t116) x 2.
With capacitance load on ICK, OCK, DO, SYNC, and SADD = 100 pF, add 4 ns to t116--t122.
Table 144. Timing Requirements for SIO Multiprocessor Communication (2.7 V Operation)
Abbreviated Reference
Parameter
Min
Max
Unit
t112
Sync Setup (high/low to high)
35
--
ns
t113
Sync Hold (high to high/low)
0
--
ns
t114
Address Setup (valid to high)
12
--
ns
t115
Address Hold (high to invalid)
0
--
ns
Table 145. Timing Characteristics for SIO Multiprocessor Communication (2.7 V Operation)
Abbreviated Reference
Parameter
Min
Max
Unit
t116
Data Delay (bit 0 only) (low to valid)
--
35
ns
t117
Data Disable Delay (high to 3-state)
--
30
ns
t120
DOEN Valid Delay (high to valid)
--
25
ns
t121
Address Delay (bit 0 only) (low to valid)
--
35
ns
t122
Address Disable Delay (high to 3-state)
--
30
ns
OCK/ICK
B0
B15
B8
B7
B1
B0
B15
SYNC
V
IH
V
IL
DO/D1
V
OH
V
OL
DOEN
V
OH
V
OL
t112
t113
t112
t113
TIME SLOT 1
TIME SLOT 2
t117
t116
AD0
AS7
AS0
AD7
AD1
AD0
SADD
t122
t121
t114
t115
t120
t120
*
5-4799 (F)
Data Sheet
DSP1629 Digital Signal Processor
January 2002
122
Agere Systems Inc.
12 Outline Diagrams
12.1 100-Pin BQFP (Bumpered Quad Flat Pack)
All dimensions are in millimeters.
5-1970 (F)r.10
PIN #1
IDENTIFIER
ZONE
89
1
13
1 4
3 8
39
6 3
64
88
19.050 0.405
22.350 0.255
22.860 0.305
22.350
0.255
19.050
0.405
22.860
0.305
EDGE CHAMFER
DETAIL A
4.570 MAX
DETAIL B
0.760 0.255
0.635 TYP
0.10
SEATING PLANE
3.555
0.255
DETAIL B
0.280 0.075
0.150
M
0.175 0.025
DETAIL A
0.255
0.91/1.17
GAGE PLANE
SEATING PLANE
Data Sheet
January 2002
DSP1629 Digital Signal Processor
Agere Systems Inc.
123
12 Outline Diagrams
(continued)
12.2 100-Pin TQFP (Thin Quad Flat Pack)
All dimensions are in millimeters.
0.50 TYP
1.60 MAX
SEATING PLANE
0.08
1.40
0.05
0.05/0.15
DETAIL A
DETAIL B
14.00
0.20
16.00
0.20
76
100
1
25
26
50
51
75
14.00
0.20
16.00
0.20
PIN #1 IDENTIFIER ZONE
DETAIL B
0.19/0.27
0.08
M
0.106/0.200
DETAIL A
0.45/0.75
GAGE PLANE
SEATING PLANE
1.00 REF
0.25
5-2146 (F)r.14
Data Sheet
DSP1629 Digital Signal Processor
January 2002
124
Agere Systems Inc.
12 Outline Diagrams
(continued)
12.3 144-Pin PBGA (Plastic Ball Grid Array)
All dimensions are in millimeters.
0.36 0.04
0.80 0.05
1.56 + 0.19
0.21
SEATING PLANE
SOLDER BALL
0.40 0.10
0.20
PWB
MOLD
COMPOUND
PIN A1
CORNER
13.00 0.20
13.00
0.20
11.50
+ 0.70
0.00
11.50
+ 0.70
0.00
A
B
C
D
E
F
G
H
J
K
L
M
1
2
3
4
5
6
7
8
9
10
11
12
11 SPACES @ 1.00 = 11.00
PIN A1
CORNER
11 SPACES @
1.00 = 11.00
0.50 0.10
5-5205 (F)
Data Sheet
January 2002
DSP1629 Digital Signal Processor
Agere Systems Inc.
125
Notes
Agere Systems Inc. reserves the right to make changes to the product(s) or information contained herein without notice. No liability is assumed as a result of their use or application.
Copyright 2002 Agere Systems Inc.
All Rights Reserved
January 2002
DS02-060AUTO
For additional information, contact your Agere Systems Account Manager or the following:
INTERNET:
http://www.agere.com
E-MAIL:
docmaster@agere.com
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1-800-372-2447, FAX 610-712-4106 (In CANADA: 1-800-553-2448, FAX 610-712-4106)
ASIA:
Agere Systems Hong Kong Ltd., Suites 3201 & 3210-12, 32/F, Tower 2, The Gateway, Harbour City, Kowloon
Tel. (852) 3129-2000, FAX (852) 3129-2020
CHINA: (86) 21-5047-1212 (Shanghai), (86) 10-6522-5566 (Beijing), (86) 755-695-7224 (Shenzhen)
JAPAN: (81) 3-5421-1600 (Tokyo), KOREA: (82) 2-767-1850 (Seoul), SINGAPORE: (65) 778-8833, TAIWAN: (886) 2-2725-5858 (Taipei)
EUROPE:
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Motorola
is a registered trademark of Motorola, Inc.
Intel
is a registered trademark of Intel Corp.
IEEE
is a registered trademark of The Institute of Electrical and Electronics Engineers, Inc.
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