一种基于CPLD的51单片机中断源扩展设计

Design for Expanding the Interrupt Sources of MCS-51 Series MCU based on CPLD

通过对CPLD芯片XC95144XL硬件编程,将复杂单片机系统的所有外部中断信号进行相关逻辑处理后来触发单片机中断,同时CPLD的硬件逻辑可以实现中断源的查询,解决了中断源扩展的问题。

By hardware programming the CPLD chip XC95144XL,all extenal interrupt singal are logic processed to trigger MCU interrupt,and the interrupt sources can be inquiried by the hardware logic of CPLD.which easily and effectively solves the technical problem of expanding interrupt sources of MCS-51 series MCU.