基于DTMF信号多点共线通话系统设计与实现

Design and Realization of the Multi-point and Coumon-line Communication System

本文论述了一个基于DTMF信号多点共线通话系统的设计,并给出了一个采用P89C51RD2FA单片机,配合DTMF收发芯片MT8888、语音电路和I2C总线方式的E2PROM(AT24C08),成功实现了远距离的多点共线通话的实例。

This paper proposes a design of the multi-point and common-line communication system in using of DTMF signal and gives a example that uses P89CSIRD2FA sigle chip microcontroller and cooperates with DTMF transceiver chipaudio circuit, I^2C bus E^2PROM （AT24C08） and has achieved multi-point and common-line remote communication successfully.