HT36A2
8-Bit Music Synthesizer MCU
Block Diagram
Rev. 1.00
1
June 19, 2003
Features
Operating voltage: 2.4V~5.0V
Operating frequency: 3.58MHz~12MHz (typ. 8MHz)
20 bidirectional I/O lines
Two 8-bit programmable timer with 8 stage prescaler
Watchdog Timer
Built-in 8-bit MCU with 208
8 bits RAM
Built-in 64K
16-bit ROM for program/data shared
Mono output
High D/A converter resolution: 16 bits
Polyphonic up to 8 notes
Independent volume mix can be assigned to each
sound component
Sampling rate of 25kHz as 6.4MHz for system
frequency
Eight-level subroutine nesting
HALT function and wake-up feature to reduce power
consumption
Bit manipulation instructions
16-bit table read instructions
63 powerful instructions
All instructions in 1 or 2 machine cycles
28-pin SOP, 48-pin SSOP package
General Description
The HT36A2 is an 8-bit high performance RISC-like
microcontroller specifically designed for music applica-
tions. It provides an 8-bit MCU and a 8 channel
wavetable synthesizer. The program ROM is composed
of both program control codes and wavetable voice
codes, and can be easily programmed.
The HT36A2 has a built-in 8-bit microprocessor which
programs the synthesizer to generate the melody by
setting the special register from 20H~2AH. A HALT fea-
ture is provided to reduce power consumption.
8 - B i t
M C U
6 4 K 1 6 - b i t
R O M
2 0 8 8
R A M
M u l t i p l i e r / P h a s e
G e n e r a l
P A 0 ~ P A 7
P B 0 ~ P B 7
P C 0 ~ P C 3
O S C 1
O S C 2
R E S
1 6 - B i t
D A C
V D D
V S S
V D D A
A U D
V S S A
Pin Assignment
Pad Assignment
Chip size: 87.2
118.3 (mil)
* The IC substrate should be connected to VSS in the PCB layout artwork.
HT36A2
Rev. 1.00
2
June 19, 2003
( 0 , 0 )
P
A
0
P
A
1
P
A
2
P
A
3
P
A
4
1
2 9 2 8 2 7 2 6 2 5 2 4 2 3 2 2
2
3
4
5
6
7
8
9
1 0
1 1
1 2
1 3
1 4
1 5
1 6
1 7
1 8
1 9
2 0
2 1
P
A
5
P
A
6
P
A
7
P B 0
P B 1
P B 2
P B 3
P B 4
P B 5
P B 6
P B 7
A
U
D
P C 0
P C 1
P C 2
P C 3
O S C 2
O S C 1
R E S
V
S
S
V
S
S
A
V
D
D
V
D
D
A
T
E
S
T
P A 4
P A 5
P A 6
P A 7
N C
P B 0
P B 1
P B 2
P B 3
P B 4
P B 5
P B 6
P B 7
N C
N C
N C
N C
N C
N C
N C
N C
N C
N C
N C
P A 3
P A 2
P A 1
P A 0
N C
N C
N C
N C
N C
N C
P C 0
P C 1
P C 2
P C 3
O S C 2
O S C 1
R E S
N C
V S S
V S S A
V D D
V D D A
T E S T
A U D
H T 3 6 A 2
4 8 S S O P - A
4 8
4 7
4 6
4 5
4 4
4 3
4 2
4 1
4 0
3 9
3 8
3 7
3 6
3 5
3 4
3 3
3 2
3 1
3 0
2 9
2 8
2 7
2 6
2 5
1
2
3
4
5
6
7
8
9
1 0
1 1
1 2
1 3
1 4
1 5
1 6
1 7
1 8
1 9
2 0
2 1
2 2
2 3
2 4
2 8
2 7
2 6
2 5
2 4
2 3
2 2
2 1
2 0
1 9
1 8
1 7
1 6
1 5
1
2
3
4
5
6
7
8
9
1 0
1 1
1 2
1 3
1 4
H T 3 6 A 2
2 8 S O P - A
P A 4
P A 5
P A 6
P A 7
N C
N C
N C
N C
N C
N C
N C
N C
A U D
T E S T
P A 3
P A 2
P A 1
P A 0
N C
N C
O S C 2
N C
O S C 1
R E S
V S S
V S S A
V D D
V D D A
Pad Coordinates
Unit:
mm
Pad No.
X
Y
Pad No.
X
Y
1
-939.550
1222.175
16
899.200
-965.126
2
-939.550
1111.575
17
899.200
-287.274
3
-939.550
1011.575
18
938.800
-100.675
4
-939.550
900.975
19
938.800
9.925
5
-939.550
800.975
20
938.800
109.925
6
-939.550
690.375
21
938.800
220.525
7
-939.550
590.375
22
-26.300
1336.775
8
-939.550
479.775
23
-136.900
1336.775
9
301.450
-1303.400
24
-236.900
1336.775
10
413.250
-1303.400
25
-347.500
1336.775
11
526.890
-1303.400
26
-447.500
1336.775
12
636.250
-1303.400
27
-558.100
1336.775
13
761.700
-1296.750
28
-658.100
1336.775
14
924.250
-1296.750
29
-768.700
1336.775
15
899.200
-1078.450
Pad Description
Pad Name
I/O
Internal
Connection
Function
PB0~PB7
I/O
Pull-High
or None
Bidirectional 8-bit Input/Output port
AUD
O
Audio output for driving a external transistor or for driving HT82V733
TEST
No connection (open)
VDDA
DAC power supply
VDD
Positive power supply
VSSA
Negative power supply of DAC, ground
VSS
Negative power supply, ground
RES
I
Reset input, active low
OSC1
OSC2
I
O
OSC1 and OSC2 are connected to an RC network or a crystal (by mask option)
for the internal system clock. In the case of RC operation, OSC2 is the output
terminal for 1/8 system clock. The system clock may come from the crystal, the
two pins cannot be floating.
PC0~PC3
I/O
Pull-High
or None
Bidirectional 4-bit Input/Output port
PA0~PA7
I/O
Pull-High
or None
Bidirectional 8-bit Input/Output port, wake-up by mask option
Absolute Maximum Ratings
Supply Voltage .............................V
SS
-0.3V to V
SS
+6V
Storage Temperature ...........................
-50C to 125C
Input Voltage .............................V
SS
-0
.
3V to V
DD
+0.3V
Operating Temperature ..........................
-25C to 70C
Note: These are stress ratings only. Stresses exceeding the range specified under
Absolute Maximum Ratings may
cause substantial damage to the device. Functional operation of this device at other conditions beyond those
listed in the specification is not implied and prolonged exposure to extreme conditions may affect device reliabil-
ity.
HT36A2
Rev. 1.00
3
June 19, 2003
D.C. Characteristics
Ta=25
C
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
V
DD
Conditions
V
DD
Operating Voltage
2.4
3
5
V
I
DD
Operating Current
5V
No load, f
OSC
=8MHz
8
16
mA
I
STB
Standby Current (WDT Disabled)
5V
No load
System HALT
1
mA
I
OL
I/O Ports Sink Current
5V
V
OL
=0.5V
9.7
16.2
mA
I
OH
I/O Ports Source Current
5V
V
OH
=4.5V
-5.2
-8.7
mA
R
PH
Pull-High Resistance of I/O Ports
5V
V
IL
=0V
11
22
44
k
W
V
IH1
Input High Voltage for I/O Ports
5V
3.5
5
V
V
IL1
Input Low Voltage for I/O Ports
5V
0
1.5
V
V
IH2
Input High Voltage (RES)
5V
4
V
V
IL2
Input Low Voltage (RES)
5V
2.5
V
A.C. Characteristics
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
V
DD
Conditions
MCU interface
f
OSC
System Frequency
5V
8MHz crystal
8
MHz
f
SYS
System Clock
5V
4
8
MHz
t
WDT
Watchdog Time-Out Period (RC)
Without WDT prescaler
9
17
35
ms
t
RES
External Reset Low Pulse Width
1
ms
Characteristics Curves
R vs F Characteristics Curve
HT36A2
Rev. 1.00
4
June 19, 2003
1 2 0
1 5 0
1 8 0
2 0 0
2 2 0
2 4 0
2 7 0
3 0 0
H T 3 6 A 2 R v s . F C h a r t
F
r
e
q
u
e
n
c
y
(
M
H
z
)
1 4
1 2
1 0
8
6
4
2
R ( k
W
)
3 . 0 V
4 . 5 V
V vs F Characteristics Curve
HT36A2
Rev. 1.00
5
June 19, 2003
H T 3 6 A 2 V v s . F C h a r t ( F o r 4 . 5 V )
2 . 4
2 . 6
2 . 8
3
3 . 2
3 . 4
3 . 6
3 . 8
4
4 . 2
4 . 4
4 . 6
4 . 8
5
V
D D
( V )
4
5
6
7
8
9
1 0
F
r
e
q
u
e
n
c
y
(
M
H
z
)
1 4 5 k
W
/ 8 M H z
1 9 0 k
W
/ 6 M H z
4
5
6
7
8
9
1 0
2 . 4
2 . 6
2 . 8
3
3 . 2
3 . 4
3 . 6
3 . 8
4
4 . 2
4 . 4
4 . 6
4 . 8
5
H T 3 6 A 2 V v s . F C h a r t ( F o r 3 . 0 V )
F
r
e
q
u
e
n
c
y
(
M
H
z
)
V
D D
( V )
1 5 5 k
W
/ 8 M H z
2 0 0 k
W
/ 6 M H z
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