Holtek's manual details hardware, pins, instruction set and development tools for the HT48R series I/O microcontrollers.
This user manual provides a complete reference for Holtek's HT48R10A‑1, HT48R30A‑1, HT48R50A‑1 and HT48R70A‑1 I/O‑type microcontrollers. It covers hardware architecture, system block diagrams, pin assignments, electrical characteristics, instruction set, assembly language and programming notes.
The document also describes the development environment, including the HT‑IDE IDE, HT‑ICE emulator, interface cards and OTP programming tools, and offers a quick‑start guide for creating, building and programming projects for these 8‑bit RISC microcontrollers. This manual is written in Chinese.
| Operating voltage (4 MHz) | 2.2 V – 5.5 V |
|---|---|
| Operating voltage (8 MHz) | 3.3 V – 5.5 V |
| Typical current at 5 V/4 MHz | 2 mA |
| Standby current at 3 V | < 1 µA |
| Operating temperature range | -40 °C – 85 °C (industrial) |
| Program memory | 1 K×14 OTP/Mask ROM (HT48R10A‑1), 2 K×14 OTP/Mask ROM (HT48R30A‑1), 4 K×15 OTP/Mask ROM (HT48R50A‑1), 8 K×16 OTP/Mask ROM (HT48R70A‑1) |
| Data memory (SRAM) | 64 × 8 bits (HT48R10A‑1), 96 × 8 bits (HT48R30A‑1), 160 × 8 bits (HT48R50A‑1), 224 × 8 bits (HT48R70A‑1) |
They are rated for industrial temperatures from –40 °C up to 85 °C.