Arduino ( atmega ) pins configured as input are said to be in a high - impedance state 接口如设置为input输入模式将导致该接口处于高电阻状态。
Ti ? the input current that holds the input at the previous state when the driving device goes to the high - impedance state 当驱动器件转至去高阻抗状态时,保持输入处于先前状态的输入电流。