本文介绍了AT89C2051 单片机与MT8880 接口的设计,说明了MT8880 芯片时钟 信号的产生方法,给出了用C51 编制的DTMF 发送和接收程序。 关键词:2051; 单片机; MT8880; 接口 Abstract: This paper introduces an interfacing design between AT89C2051 single-chip microcomputer and chip MT8880. It also explains to generate the clock signal of chip MT8880 and gives C51 program for sending and receiving DTMF signal. Keywords:2051;single-chip microcomputer; MT8880; interface