A method on expansion of multilevel interrupt priority for MCS 51 single chip computer with software is studied.
介绍了一种在不增加任何硬件的情况下用软件扩展MCS - 51单片机多中断优先级的方法。
If high priority interrupts are not disabled during low priority interrupts, users must save the key registers in software during a low priority interrupt.
如果在响应低优先级中断时高优先级中断使能，用户必须在低优先级中断响应程序中保存那些关键的寄存器值。
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