HT37A70/60/50/40/30/20
8-Channel Music Synthesizer MCU
Technical Document
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Application Note
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HA0075E MCU Reset and Oscillator Circuits Application Note
Features
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Operating voltage:
16-bit table read instructions for any bank/page read
Support 16 to 28 bidirectional I/O lines
3.6V~5.5V (HT37A70/60)
3.3V~5.5V (HT37A50/40)
2.4V~5.5V (HT37A30/20)
Integrated 2-ch stereo or 1-ch mono 16-bit DAC
converter
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Operating frequency: 11.059MHz
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Integrated power Amplifier
Oscillation modes for the Oscillator clock
Integrated 8-channel 12-bit A/D converter
Eight channel polyphonic synthesizer
Low voltage reset (Tolerance ± 10%)
External interrupt INT
f
OSC: Crystal (11.059MHz)
1-pin RC oscillation typ. 11.059MHz
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Built-in 8-bit MCU (HT-8) with 320´8 bits RAM
Built-in 32K´16-bits to 256K´16-bits ROM for
program/data shared
External 2 Timer clock input
4 or 8 touch switch input
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Eight-level subroutine nesting
Two 8 bit timer and one 16 bit timer
Watchdog timer
ADPCM decoder
Bit manipulation instructions
63 powerful instructions
Power-down and Wake-up features for power saving
operation
All instructions in 1 or 2 machine cycles
General Description
The device is an 8-bit high performance RISC architec-
ture microcontroller specifically designed for various
Music and ADPCM applications. It provides an 8-bit
MCU and 8-channel Wavetable synthesizer. It has a in-
tegrated 8-bit micro controller which controls the syn-
thesizer to generate the melody by setting the special
register. A Power-down function is included to reduce
power consumption.
Selection Table
Most features are common to all devices, the main feature distinguishing them are Program Memory capacity, I/O
count, A/D resolution, DAC output, R2F input and package types. The following table summarizes the main features of
each device.
Program
ROM
Power
AMP
Package
Types
Part No.
HT37A20
HT37A30
VDD Channel OSC
RAM
I/O
D/A
CR/F LVR
ADC
¾
2.2V/
32K´16bit
64K´16bit
16
1ch-mono
¾
Ö
4
20/28SOP
3.3V
2.4V~
5.5V
2.2V/
28SOP,
20 2ch-Stereo
8
¾
3.3V
48SSOP
11.059
6+2
MHz
320´8bit
HT37A40
HT37A50
HT37A60
HT37A70
96K´16bit
128K´16bit
192K´16bit
256K´16bit
28 2ch-Stereo
28 2ch-Stereo
28 2ch-Stereo
28 2ch-Stereo
Ö
Ö
Ö
Ö
8
3.3V~
5.5V
3.0V
8
28SOP,
12-bit´8 64QFP,
80LQFP
8
3.6V~
5.5V
3.3V
8
Rev. 1.00
1
February 17, 2009