HT36A4 Datasheet, PDF (1/22 Pages) Holtek Semiconductor Inc – 8-Bit Music Synthesizer MCU

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
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
· 16-pin DIP, 20-pin SOP package
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.
Block Diagram
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.
P A 0~P A 7
O SC1
O SC2
RES
3 2 K ´ 1 6 - b it
ROM
8 - B it
208´8
M CU
RAM
VDD
VSS
VDDA
VSSA
M u ltip lie r /P h a s e
G e n e ra l
1 6 - B it
DAC
AUD
Pin Assignment
PA4
PA5
PA6
PA7
VSS
VDD
VDDA
TEST
1
16
2
15
3
14
4
13
5
12
6
11
7
10
8
9
H T36A 4
1 6 D IP -A
PA3
PA2
PA1
PA0
O SC2
O SC1
RES
AUD
PA4
PA5
PA6
PA7
VSS
VSSA
VDD
NC
VDDA
TEST
1
20
2
19
3
18
4
17
5
16
6
15
7
14
8
13
9
12
10
11
H T36A 4
2 0 S O P -A
PA3
PA2
PA1
PA0
NC
O SC2
O SC1
NC
RES
AUD
Rev. 1.00
1
July 2, 2003