HT48RA0-2/ HT48CA0-2 is a remote control type eight-bit microcontroller with a working voltage range of 2.0V ~3.6V, bidirectional input/output ports, Schmitt trigger inputs, carrier output ports, built-in crystal and RC oscillator circuits, and more.
The HT48RA0-2 (OTP version) and HT48CA0-2 (mask version) are high‑performance 8‑bit RISC microcontrollers designed for applications that require many I/O pins, low power consumption and flexible timing features. They include a carrier‑wave output, watchdog timer, low‑voltage reset and a built‑in oscillator.
The document provides a full pin diagram, electrical characteristics, memory organization, status register description, oscillator selection (crystal or RC), watchdog timer operation, and package dimensions for the 20‑pin SOP/SSOP package. This manual is written in Chinese.
| Operating voltage | 2.0 V – 3.6 V |
|---|---|
| Program memory | 1 K × 14 bits (EPROM) |
| Data memory | 32 × 8 bits (RAM) |
| I/O pins | 10 bidirectional I/O ports |
| Package | 20‑pin SOP/SSOP |
| Oscillator options | Crystal or RC oscillator selectable |
| Watchdog timer | Present, configurable |
| Low‑voltage reset | Supported |
The device operates from 2.0 V to 3.6 V.
It provides ten bidirectional input/output ports.
Both crystal and RC oscillator modes can be selected via mask options.