HT36A4
8-Bit Music Synthesizer MCU
Features
·
Operating voltage: 2.4V~5.0V
·
Operating frequency: 3.58MHz~12MHz (typ. 8MHz)
·
8 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 32K´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
·
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
·
16-pin DIP, 20-pin SOP package
sound component
General Description
The HT36A4 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 HT36A4 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.
Block Diagram
3 2 K
´
1 6 - b it
R O M
8 - B it
M C U
2 0 8
´
8
R A M
M u ltip lie r /P h a s e
G e n e ra l
1 6 - B it
D A C
P A 0 ~ P A 7
O S C 1
O S C 2
R E S
V D
V S
V D
V S
S
D
D A
S A
A U D
Pin Assignment
P A 4
1
2
3
4
5
6
7
8
9
1 0
P A 5
P A 4
1
2
3
4
5
6
7
8
P A 5
P A 6
P A 7
V S S
V D D
V D D A
T E S T
1 6
1 5
1 4
1 3
1 2
1 1
1 0
9
P A 3
P A 2
P A 1
P A 0
O S C 2
O S C 1
R E S
A U D
P A 6
P A 7
V S S
V S S A
V D D
N C
V D D A
T E S T
2 0
1 9
1 8
1 7
1 6
1 5
1 4
1 3
1 2
1 1
P A 3
P A 2
P A 1
P A 0
N C
O S C 2
O S C 1
N C
R E S
A U D
H T 3 6 A 4
1 6 D IP -A
H T 3 6 A 4
2 0 S O P -A
Rev. 1.00
1
July 2, 2003
HOLTEK [ HOLTEK SEMICONDUCTOR INC ]
