HD49235FS
Digital Signal Processor for CD
ADE-207-162A(Z)
2nd. Edition
August 1995
Description
The HD49235FS is a digital signal processor for compact disc (CD) applications.
Features
Powerful error correction capability: two-symbol C1 correction and four-symbol C2 correction
Quadruple-speed reproduction supported (maintaining two-symbol C1 and four-symbol C2 error
correction)
On-chip analog PLL and digital PLL (VCO and phase detector)
Automatic adjustment of the free-running frequency of the VCO
Built-in microprocessor interface
On-chip 80-bit shift registers for Q-code buffering
Cyclic redundancy check on Q-code values
Audio output functions: monaural output, single-channel mute, left-right reverse, soft mute, 12-dB
attenuation
16-kbit RAM on-chip
HD49235FS
Rev.2, Aug. 1995, page 2 of 41
Pin Arrangement
NC
NC
NC
NC
NC
NC
NC
NC
NC
V (D)
XCI
XCO
NC
MCK
TC1
UCK
SS
QDSEL
DSLCO
DSLCI
EFMI
DEFCT
TEST2
TEST3
UCKSL
V (D)
PWM
MON
MSTOP
PW64
ROTD
CLVS
SLOCK
DD
65
80
64
41
40
25
24
1
PDOUT1
V (A)
AMPP
AMPM
AMPO
AC
V (A)
PDOUT2
TEST1
MRST
PLLCK
NC
V (D)
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
DD
SS
DD
XRST
CNIN
SENS
DATA
CLK
XLT
V (D)
OVFW
S1
QOK
QDATA
CKEXT
SUBOUT
SUBCK
CFCKP
EMP
BIDAT
MUTE
DAS
CKX
MPX
C2F
QMX
DMX
SS
(Top view)
HD49235FS
Rev.2, Aug. 1995, page 3 of 41
Pin Description
Pin
Polarity
No. Symbol
Name
I/O*
Connection
Function
H
L
1
XRST
X (-com)
reset
I
Microprocessor Microprocessor interface
register reset
Reset
2
CNIN
Counter clock
input
I
Servo IC
Pulse input for track counter
3
SENS
Sensor
TO
Microprocessor Servo status output
4
DATA
Data
I
Microprocessor Data input for microprocessor
interface
5
CLK
Clock
I
Microprocessor Clock input for microprocessor
interface
6
XLT
X (-com) latch I
Microprocessor Strobe input for
microprocessor interface
7
V
SS
(D)
V
SS
(digital)
--
Digital ground
8
OVFW
RAM- overflow O
On-chip RAM overflow signal
output
Overflow
9
S1
Subcode sync
1
O
Microprocessor Subcode sync signal
(with protection)
10
QOK
Q-code OK
O
Microprocessor Subcode CRC result output
OK
NG
11
QDATA
Q-code data
O
Microprocessor Subcode Q data output
12
CKEXT
Clock-EXT
I
Microprocessor Clock input for Q data readout
13
SUBOUT Subcode out
O
CD graphics
Subcode data output for CD
graphics
14
SUBCK
Subcode clock I
CD graphics
Clock input for SUBOUT
subcode readout
15
CFCKP
C&D frame
clock out
O
CD graphics
Subcode frame
synchronization signal (7.35
kHz at normal speed,
synchronized with PLL)
16
EMP
Emphasis
output
O
Emphasis on/off status output
ON
OFF
17
BIDAT
Biphase date
TO
Digital audio interface output
18
MUTE
Mute
I
Microprocessor Audio mute input
Mute
19
DAS
Data serial out O
DAC or ROM
decoder
Serial data output for audio or
ROM
20
CKX
Clock X
O
DAC or ROM
decoder
Strobe clock output for DAS
signal
HD49235FS
Rev.2, Aug. 1995, page 4 of 41
Pin Description (cont)
Pin
Polarity
No. Symbol
Name
I/O*
Connection
Function
H
L
21
MPX
Multiplex
O
DAC or ROM
decoder
Left/right channel switching
signal output (44.1 kHz at
normal speed, synchronized
with DAS)
22
C2F
C2 flag
O
ROM decoder
C2 error flag output
Error
23
QMX
Quad multiplex O
4
MPX clock signal
(176.4 kHz at normal speed,
synchronized with DAS)
24
DMX
Double
multiplex
O
2
MPX clock signal
(88.2 kHz at normal speed,
synchronized with DAS)
25
UCK
-com clock
O
Microprocessor Clock output for
microprocessor
(8.5 MHz or 17 MHz)
26
TC1
Test C1 flag
O
C1 error flag monitor pin
Error
27
MCK
Master clock
O
Master clock output
(33.8688 MHz)
28
NC
No connection --
Open or VDD
Not connected
29
XCO
X'tal clock
output
XO
Crystal
oscillator
Crystal oscillator output
30
XCI
X'tal clock
input
XI
Crystal
oscillator
Crystal oscillator input
31
V
SS
(D)
V
SS
(digital)
--
Digital ground
32
NC
No connection --
Open
Not connected
33
NC
No connection --
Open
Not connected
34
NC
No connection --
Open
Not connected
35
NC
No connection --
Open
Not connected
36
NC
No connection --
Open
Not connected
37
NC
No connection --
Open
Not connected
38
NC
No connection --
Open
Not connected
39
NC
No connection --
Open
Not connected
40
NC
No connection --
Open
Not connected
41
NC
No connection --
Open
Not connected
42
NC
No connection --
Open
Not connected
43
NC
No connection --
Open
Not connected
44
NC
No connection --
Open
Not connected
HD49235FS
Rev.2, Aug. 1995, page 5 of 41
Pin Description (cont)
Pin
Polarity
No. Symbol
Name
I/O*
Connection
Function
H
L
45
NC
No connection --
Open
Not connected
46
NC
No connection --
Open
Not connected
47
NC
No connection --
Open
Not connected
48
NC
No connection --
Open
Not connected
49
NC
No connection --
Open
Not connected
50
NC
No connection --
Open
Not connected
51
NC
No connection --
Open
Not connected
52
V
DD
(D)
V
DD
(digital)
--
Digital power supply
53
NC
No connection --
Open or V
DD
Not connected
54
PLLCK
PLL clock
O
PLL clock output monitor
55
MRST
Master reset
IU
Open or V
DD
Master reset of chip
Reset
56
TEST1
TEST 1
IU
Open or V
DD
Test pin
57
PDOUT2 Phase detect
out 2
TO
External RC
circuit
PLL auto-adjust phase
detector output
58
V
SS
(A)
V
SS
(analog)
--
Analog ground
59
AC
Amp
compensation
A
External RC
circuit
Amplifier phase compensation
pin
60
AMPO
Amp output
AO
External RC
circuit
PLL amplifier output
61
AMPM
Amp minus
input
AI
External RC
circuit
PLL amplifier inverting input
62
AMPP
Amp plus input AI
External RC
circuit
PLL amplifier non-inverting
input
63
V
DD
(A)
V
DD
(analog)
--
Analog power supply
64
PDOUT1 Phase detect
out 1
TO
External RC
circuit
PLL EFM phase detector
output
65
QDSEL
Q-data clock
select
IU
Q data readout mode
switching signal input
Internal
sync
External
sync
66
DSLCO
DSL control
output
O
External RC
circuit
EFM comparator slice level
control output
67
DSLCI
DSL control
input
AI
External RC
circuit
EFM comparator slice level
control input
68
EFMI
EFM signal
input
AI
EFM signal input
69
DEFCT
Defect
I
Servo IC
Defect detection signal input
Defect
70
TEST2
TEST 2
IU
Open or V
DD
Test pin
PDF 
ZIP