Holtek Semiconductor HT37Q40
The device is an 8-bit high performance RISC architecture microcontroller specifically designed for various Music and ADPCM applications. It provides an 8-bit MCU and 4-channel Wavetable synthesizer.FEATURES
● Operating voltage: 3.6V~5.5V (HT37Q70/60) 3.3V~5.5V (HT37Q50/40) 2.4V~5.5V (HT37Q30/20)● Operating frequency: typical 11.059MHz
● Oscillation modes for the Oscillator clock fOSC: Crystal (11.059MHz) 1-pin RC oscillation typ. 11.059MHz
● 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
● Eight-level subroutine nesting
● Two 8 bit timer and one 16 bit timer
● Watchdog timer
● Power-down and Wake-up features for power saving operation
● 16-bit table read instructions for any bank/page read
● Support 16 to 28 bidirectional I/O lines
● Integrated 1-ch mono 16-bit DAC converter
● Integrated power Amplifier
● Four channel polyphonic synthesizer
● Low voltage reset (Tolerance ± 10%)
● External interrupt INT
● External 2 Timer clock input
● 4 or 8 touch switch input
● ADPCM decoder
● Bit manipulation instructions
● 63 powerful instructions
● All instructions in 1 or 2 machine cycles
GENERAL DESCRIPTION
It has a in- tegrated 8-bit micro controller which controls the synthesizer to generate the melody by setting the special register.