HT48E30 is an 8-bit MTP microcontroller produced by Holtek, with a working voltage of 2.2V – 5.5V and a maximum clock frequency of 8MHz.
The HT48E30 is an 8‑bit high‑performance microcontroller designed for low‑cost multi‑I/O control applications. It offers low power consumption, built‑in timers, watchdog, buzzer driver, and flexible clock options.
This manual covers the device overview, electrical characteristics, pin assignments, instruction set, programming methods (assembly and C), in‑system programming, and memory organization, helping developers integrate the chip into their designs. This manual is written in Chinese.
| Operating voltage (4 MHz) | 2.2 V – 3.3 V |
|---|---|
| Operating voltage (8 MHz) | 3.3 V – 5.5 V |
| Program memory | 2048 × 14 bits (ROM/MTP) |
| Data EEPROM | 128 × 8 bits |
| RAM | 96 × 8 bits |
| Bidirectional I/O pins | Up to 23 pins |
| Watchdog timer data retention | >10 years |
| Typical power consumption | 500 mW |
| Package types | 24‑pin or 28‑pin SKDIP/SOP |
It provides up to 23 bidirectional input/output pins.
The microcontroller has 2048 words of 14‑bit program memory (ROM/MTP).
Yes, it includes a watchdog timer whose EEPROM data remains valid for more than 10 years.