HT48RA3/HT48CA3 is a remote control type eight-bit microcontroller with a working voltage of 2.0V to 5.5V, up to 23 bidirectional input/output ports, support for PFD, HALT and wake-up functions to reduce power consumption, and other features.
The HT48RA3 and HT48CA3 are 8‑bit high‑performance RISC microcontrollers designed for remote‑control and other multi‑I/O applications. They feature low power consumption, built‑in timers, watchdog, and a 28‑pin SOP/SSOP package.
The document covers the chip overview, pinout, electrical characteristics, absolute‑maximum ratings, system functions, program memory organization, and several application examples such as EEPROM read/write and LCD control. This manual is written in Chinese.
| Operating voltage | 2.0 V – 5.5 V |
|---|---|
| Maximum I/O pins | 23 bidirectional I/O pins |
| 8‑bit timer/counter | Programmable with overflow interrupt |
| 16‑bit timer/counter | Programmable with overflow interrupt |
| Watchdog timer | Included |
| Package | 28‑pin SOP/SSOP |
| Maximum system clock | 4 MHz |
The device operates from 2.0 V to 5.5 V.
It can provide up to 23 bidirectional I/O pins.
Yes, a watchdog timer is built into the microcontroller.
The microcontroller is supplied in a 28‑pin SOP/SSOP package.