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MSP430F5438停产后需要更换MSP430F5438A，更换后表现为不断自动重启。
两者之间的区别，您可以参考该文档
https://www.ti.com/lit/an/slaa419c/slaa419c.pdf
2.1 PMM Settings and Low Power Consumption
给出了详细的说明，您可以对照一下您现在的相关参数及设置
