我要用CC2640R2F的DIO-2脚驱检测一个光耦的输出,可是光耦的低电平输出不是0V,我想问3.3V供电情况下CC2640R2F多少V电压会认为是低电平,多少V电压会认为是高电平。
CC2640R2F高低电平判断
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