摘要
介绍一种在火车站自动播音系统中用单片机构成的下位机系统。该系统可接收上位机指令工作，也可用自带键盘工作，还可手动以进行应急广播，从而保证了整个系统的可靠性。该系统已用于济南新客站。
his paper proposes a SC processor based slave computer system that is
used in the automatic broadcasting system in Jinan Railway Station.The system may work from
the command of the supervisory computer or work with builtin keyboard.It also may work manually
in case of emergency to ensure the system reliability
