This document describes different series of microcontroller units (MCUs) and their features, including 8-bit MCU, LCD controller and driver, remote controller, phone controller, music MCU, etc. It also introduces different types of memory, electronic devices, and power management devices.
The guide provides an overview of Holtek's 8‑bit microcontroller families, grouped by functionality such as I/O Type, LCD Type, A/D Type, R‑F Type, Remote Type, and many specialized series. Each series entry includes part numbers, operating voltage, system clock range, memory sizes, and available package types.
Notes indicate which devices are mask‑version MCUs and which are OTP (one‑time‑programmable) versions, and the document also lists programming tools and indexing tables for developers.
| Operating voltage (I/O Type MCU) | 2.2V~5.5V |
|---|
The I/O Type MCUs operate from 2.2 V to 5.5 V.
Devices whose part numbers end with “/R” are OTP (one‑time‑programmable) versions.