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MSP430FR50431: 根据官方DEMO制作首版样件,USS捕获ADC波形异常

Part Number: MSP430FR50431
Other Parts Discussed in Thread: OPA836

使用FR50431开发样板,

利用USS上位机工具捕获的ADC波形如下图

,无法捕捉完整的ADC值,基准值未保持在0点,而是向下偏移-1800,有哪位大神可以帮忙分析下是什么问题?