n具有优先级的程序块时序允许有最多32个中断触发。具有优先级的程序块时序情况下，为每一个触发指定-个优先级。正常程序块时序中断驱动逻辑在系统内所有的用户程序中具有最高的优先级。CPU优先执行中断触发的程序块。在中断驱动的程序块执行完毕后，CPU再接着执行其他程序。
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