摘要
本文介绍一种以89C51单片机为核心,利用8279可编程键盘显示芯片、DTMF发送/接收一体芯片MT8880C和公共电话网组成的多点信号检测与远传系统,样机实验证明电路设计合理,工作可靠,同时结构紧凑,价格低廉。
This text introduction one kind takes 89C51's Single -chip computer as the nucleus , and the utilization 8279 programmable keys dishes shows chip and DTMF transmiting / receipt organic whole chip MT8880C and public telephone and netting the multidrop signal detection of component with far passing the system , and the prototype of a machine experiment proof circuit design is reasonable , and it is reliable to work , at the same time structure compact , price is cheap.
出处
《微计算机信息》
2002年第9期32-33,35,共3页
Control & Automation
