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IO口输入电压几伏以上算高电平，几伏以下算低电平
按ViH 0.65*VDD 和ViL 0.35*VDD来算吧。
BR. AZ
谢谢，再请教下
如果我的VDD为2.1V，但某传感器的输出高电平为3V能否直接接IO口？还是只能放弃2.1V的供电方案改用3V供电？
是的，从ADC CHARACTERISTICS section of Datasheet, AVDD5 max is VDD.
