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做内部ADC12检测时,P6口上电电平即为2V这是什么情况,选择的参考电压为2.5V(内部)。不对引脚输入电压则输出为3000多(2*4096/2.5)。这怎么解决?
您说的这个口外部有电路么?
用万用表打一下看看电平是多少
如果AD的输入引脚悬空,其输出值是不定的,建议将其先拉在一个已知电平上,在看转换情况是否如预期