Holtek Semiconductor HT36A4
The HT36A4 is an 8-bit high performance RISC-like microcontroller specifically designed for music applications. 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.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/SOP package sound component
GENERAL DESCRIPTION
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 feature is provided to reduce power consumption. Block Diagram 3 2 K ´ 1 6 - b it R O...