基于串行口的一种中断源扩展电路

An Interrupt Source Expanded Circuit Based on Serial Port

针对８０３１单片机设计了一种基于串行接口的中断源扩展电路，电路由一优先编码器和并入串出移位寄存器构成，串行口工作于方式０，电路简单，能扩展８个以上中断源。

An interrupt source expanded circuit based on serial port is designed for 8031. The circuit that is composed of a priority encoder and a parallel to series converter is very simple. In this case, the serial port operates in mode 0. Through this method, more than 8 interrupt sources are obtained.