摘 要EM78447芯片是一种高性能、低功耗的8位单片机，它内部有4K*13位的程序存储器。由于其卓越的性能特点，在很多嵌入系统中得到了应用；而且，它的生产厂商为我们提供了集程序开发和写入于一体的仿真写入器。本文详细阐述了EM78447单片机的特点、引脚及其功能，并结合具体例子介绍了EM78447的应用。 Abstract The EM78447 is a high performance, low power, 8-bit microcontroller with internal 4K * 13-bit program memory. Because of its excellent performance characteristics, in many embedded systems have been applied; Moreover, its manufacturers provide us with a set of program development and writing in one of the simulation writer. This article elaborated the characteristic of EM78447 one-chip computer, pin and its function, and introduced the application of EM78447 with concrete example.