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MSP320FR6972群脉冲实验

 用FR6972做产品烧程序后正常运行,做完群脉冲实验后,测试功能有问题,用GANG读程序后发现全为FF.

程序也有代码保护段,请问可能是哪些问题引起的。产品是电池供电,上电波形如图。复位电路R=100K,C=0.1uF.