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环境温度68℃,TM4C129ENCPDTI391C6ZRW芯片串口通讯通一帧断一帧现象。

CPU芯片,3.3V工作电压,工作电流200mA,

高低温试验箱设置温度68℃,湿度位0,

我们CPU板的485通信出现通一帧断一帧的现象。

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