LPM4.5在调试过程中，刚开始LPM4.5唤醒正常，调试一段时间后，LPM4.5将无法唤醒，但是LPM3能正常唤醒，不知道什么原因导致此问题，相同的程序DEMO板是没有问题的。如果换新的单片机芯片，故障现象解除。单片机供电3.0V。请问什么原因会导致此次问题。怎么避免？
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