HT36B4
Music Synthesizer 8-Bit MCU
Technical Document
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·
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Features
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Operating voltage: 2.4V~5.0V
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Operating frequency: 3.58MHz~12MHz
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Polyphonic up to 16 notes
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Independent pan and volume mix can be assigned to
(typ. 11.059MHz)
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28 bidirectional I/O lines
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Two 16-bit programmable timer/event counters with
each sound component
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Sampling rate of 44.1kHz as 11.059MHz for system
frequency
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Eight-level subroutine nesting
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HALT function and wake-up feature to reduce power
overflow interrupts
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Watchdog Timer
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Built-in 8-bit MCU with 208´8 bits RAM
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Built-in 64K´16-bit ROM for program/data shared
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Digital output pins for external DAC
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Single data format with 16 bits digital stereo audio
consumption
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Bit manipulation instructions
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16-bit table read instructions
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63 powerful instructions
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All instructions in 1 or 2 machine cycles
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48-pin SSOP package
output
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Two High D/A converter resolution: 16 bits
General Description
The HT36B4 is an 8-bit high performance RISC-like
microcontroller specifically designed for music applica-
tions. It provides an 8-bit MCU and a 16 channel
wavetable synthesizer. The program ROM is composed
of both program control codes and wavetable voice
codes, and can be easily programmed.
The HT36B4 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
P A
P B
P C
P D
0 ~
0 ~
0 ~
0 ~
P A
P B
P C
P D
3
7
7
7
P F 0 ~ 2
6 4 K
´
1 6 - b it
R O M
2 0 8
´
8
R A M
M u ltip lie r /P h a s e
G e n e ra l
V D
V S
V D
V S
S
1 6 - B it
D A C
1 6 - B it
D A C
D
D A
S A
O S C 1
O S C 2
R E S
8 - B it
M C U
R C H
L C H
P D 2 /L O A D
P D 1 /D O U T
P D 3 /D C K
Rev. 1.00
1
October 18, 2006
HOLTEK [ HOLTEK SEMICONDUCTOR INC ]
