上电后A7采样通道对应的引脚上有3.3v电压,这个太不正常了。若给A7引脚加1v电压则会变成二点几伏,采出来的数值也是二点几伏的。真是无语了,有哪位大神知道这是怎么了吗,求解救
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上电后A7采样通道对应的引脚上有3.3v电压,这个太不正常了。若给A7引脚加1v电压则会变成二点几伏,采出来的数值也是二点几伏的。真是无语了,有哪位大神知道这是怎么了吗,求解救