The HT36A2 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. The HT36A2 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.
The HT36A2 is an 8‑bit RISC‑like microcontroller designed for music applications. It integrates a 208 × 8‑bit RAM, a 64 K × 16‑bit ROM, two programmable timers, a watchdog timer, and a 16‑bit DAC, supporting polyphonic output of up to eight notes. The device operates from 2.4 V to 5.0 V and offers 20 bidirectional I/O lines in 28‑pin SOP or 48‑pin SSOP packages.
The datasheet details the pin layout, absolute maximum ratings, DC and AC electrical characteristics, memory map, and programming model. It also includes package dimensions and contact information for Holtek sales offices worldwide.
| Operating voltage | 2.4 V – 5.0 V |
|---|---|
| Operating frequency | 3.58 MHz – 12 MHz (typ. 8 MHz) |
| I/O lines | 20 bidirectional |
| Timers | Two 8‑bit programmable timers with 8‑stage prescaler |
| Watchdog timer | Included |
| RAM | 208 × 8 bits |
| ROM | 64 K × 16 bits |
| DAC resolution | 16 bits |
| Polyphony | Up to 8 notes |
| Sampling rate | 25 kHz |
| Package options | 28‑pin SOP, 48‑pin SSOP |
The HT36A2 operates from 2.4 V to 5.0 V.
It provides 20 bidirectional I/O lines.
The built‑in DAC has a 16‑bit resolution.
The device is offered in 28‑pin SOP and 48‑pin SSOP packages.