Key facts
- Brand
- Holtek
- Model
- HT48
- Category
- Other device
- Industry
- Electronics
- Documents
- 12
- Languages
- ZH · JA · EN
- Last added
- 2026-09-28
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Holtek HT48E30 Microcontroller User Manual
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.
Holtek HT48 specifications
| Operating voltage (4 MHz) | 2.2 V ~ 5.5 V |
|---|---|
| Operating voltage (8 MHz) | 3.3 V ~ 5.5 V |
| Operating voltage (12 MHz) | 4.5 V ~ 5.5 V |
| EEPROM size | 128 × 8 bits (128 bytes) |
| Total sink current per port | 150 mA |
| Maximum power consumption | 500 mW |
| Operating temperature range | -40 °C ~ 85 °C |
All Holtek HT48 documents by type
Ratings, dimensions and ordering codes, for selection and design work.
Day-to-day operation, settings and troubleshooting. Start here if the product is already set up.
Instruction set, parameters and examples for configuring or programming the device.
Questions answered in these manuals
What is the operating voltage range for the HT48F series?
The devices operate from 2.2 V to 5.5 V at 4 MHz, 3.3 V to 5.5 V at 8 MHz, and 4.5 V to 5.5 V at 12 MHz.
What is the size of the built‑in EEPROM?
Each device includes 128 × 8 bits (128 bytes) of EEPROM memory.
What is the operating voltage range of the HT48RA3/HT48CA3?
The device operates from 2.0 V to 5.5 V.
From: Holtek HT48RA3/HT48CA3 Remote Control Microcontroller User Manual
How many bidirectional I/O pins does the HT48RA3/HT48CA3 support?
It can provide up to 23 bidirectional I/O pins.
From: Holtek HT48RA3/HT48CA3 Remote Control Microcontroller User Manual
How many bidirectional I/O pins does the HT48E30 provide?
It provides up to 23 bidirectional input/output pins.
What is the size of the program memory in the HT48E30?
The microcontroller has 2048 words of 14‑bit program memory (ROM/MTP).