【摘要】 介绍了一种新的有线传呼对讲系统的设计方法。该系统以单片机EM78P4 47SB为主控制器 ,通过信号发射芯片HT92 0 0B和接收芯片MT8870等外围器件 ,实现了按键输入拨号进行个呼、部分呼、群呼、来电显示以及音乐铃声等功能 ,而所需的元器件极少 ,有利于推广利用更多还原

【Abstract】 A new design method of wire interactive conversation system is introduced, which uses EM78P447SB chip micro controller signal receiving as main controller, and uses signal generating IC HT9200B and signal receiving IC MT8870, to realize functions of keyboard input, individual call, partial call, all call, incoming telegram display and so on. The system has been utilized practically.更多还原