基于单片机控制的小型程控交换系统设计  

Design of Small Exchange Experiment System Based on Single Chip Microcomputer Control

作　　者：徐运武[1] 李艳[1] 

机构地区：[1]广东松山职业技术学院电气工程系,广东韶关512126

出　　处：《湖北理工学院学报》2013年第3期8-12,共5页Journal of Hubei Polytechnic University

摘　　要：利用时分交换芯片MT8980和单片机AT89C51设计一个小型程控交换系统,介绍MT8980工作原理,给出用户线接口电路、PCM编译码电路、双音多频检测等模块电路图及工作原理,详细介绍MT8980与AT89C51接口及交换控制电路的设计思路,样机测试效果良好,性能稳定。This paper brings forward the design of a small program -controlled exchange system using time division switching chip MT8980 and single -chip microcomputer AT89C51. The MT8980 function, the subscriber line interface, PCM encoding or decoding, the circuit diagram and working principle of the dual tone multiple frequency detection module are introduced. The design and the program of the interface between MT8980 and AT89C51 and its switching control circuit are especially described in details. The prototype tests well with stable performance.

关 键 词：程控交换 单片机 用户线接口 PCM 

分 类 号：TP36[自动化与计算机技术—计算机系统结构]