Realization of serial communication between upper-end computer and automatic switching by a microchip(PIC16F873) is introduced. And the hardware interface and main flow chart of software programming are presented in the paper.

• 介绍利用单片机PIC16F873作为串行通信模块,实现上位PC机与智能型自动转换开关之间通信的功能,主要包括两者实现通信的硬件接口及主要程序流程。