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MSP430周期性复位

Other Parts Discussed in Thread: MSP430F5438A

有一个表类项目,在使用MSP430FR5438A,目前有这样一个现象:MCU周期性复位,大概2分钟左右会复位一次,有时候比2分钟长,有时候比2分钟短,误差上下10几秒,很有规律,内部狗关闭了,外部狗也摘掉了,有什么检查的方法吗?