NEC 78K0/LF3 8‑bit Microcontroller User Manual

About this manual

This manual describes the features and design considerations of the NEC 78K0/LF3 8‑bit microcontroller family, covering models such as μPD78F047x, μPD78F048x and μPD78F049x. It includes sections on pin functions, CPU architecture, port functions, clock generator, timers, serial interfaces and flash memory programming.

The document also gives practical advice on handling unused pins, ESD protection, power‑on sequencing, and recommended development tools, with references to related NEC documentation and support contacts. This manual is written in Chinese.

What's inside

• Overview
• Pin Functions
• CPU Architecture
• Port Functions
• Clock Generator
• 16‑bit Timer/Event Counter
• 8‑bit Timer/Event Counter
• Serial Interface UART0
• Flash Memory

Specifications

Frequently asked questions

How should unused input pins be handled?

Each unused pin should be connected to VDD or GND through a resistor, or defined as an output pin if possible.