This document is about Holtek's intellectual property policy and the specifications of the HT48RA5/HT48CA5 remote control eight-bit microcontroller. The microcontroller has features such as operating voltage of 2.0V to 5.5V, multiple input/output ports, and programmable timers/counters.
The HT48RA5/HT48CA5 is an 8‑bit RISC microcontroller designed for remote‑control applications, offering low power consumption, multiple I/O ports, and built‑in timers. It supports both crystal and RC oscillators and includes a watchdog timer, power‑on reset, and low‑voltage reset features.
The document provides detailed electrical characteristics, pin descriptions, memory organization, instruction set information, and packaging dimensions, enabling designers to integrate the device into industrial control, consumer products, and subsystem controllers. This manual is written in Chinese.
| Supply voltage (VDD) | 2.0 V – 5.5 V |
|---|---|
| Operating temperature | -40 °C – 85 °C |
| Program memory (ROM) | 40 K ×16‑bit (8 K ×16‑bit ×5 banks) |
| Data memory (RAM) | 224 ×8‑bit |
| I/O pins | Up to 23 bidirectional I/O pins |
| Package | 28‑pin SOP/SSOP (209 mil) |
| Maximum power consumption | 500 mW |
The device operates from 2.0 V to 5.5 V.
It provides up to 23 bidirectional I/O pins.
The microcontroller is supplied in a 28‑pin SOP/SSOP package (209 mil).
It can operate from –40 °C to +85 °C.