分析了MCS一51单片机返回指令，解决了如何释放中断逻辑的问题，并给出一些特殊用法及实用程序。

This paper analyses the return instruction of MCS-51 and gives the answer to releasing the interrupt. Some special use and program are also given.

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您还可以控制您想要终止的线程，中断的频率，甚重定义在中断以后必须为真的逻辑表达式。

You can control the thread on which you wish to stop, the frequency of suspension, and even define a Boolean expression that must be true before suspending.

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例如，当涉及到数字逻辑时，由于即使瞬间中断信号，器件的状态也可能会发生变化，所以通常就需要采用热交换。

For ex ample, hot switching is typically used where digital logic is involved, because devices may change state if the power is interrupted even for a brief instant.

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