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如何清掉wic pending中断

xb600

系统进入deepsleep后，整个cm3会处于断电复位状态，外部中断通过wic唤醒cm3。由于wic会将会中断信息一直pending，导致cm3醒来后，enable中断，马上进入wakeup中断服务程序，并且无法清楚中断；

想请教一般情况下，wic的中断pend何时清掉，通过什么方式清除；

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