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硬件-上下拉电阻和GPIO方面介绍 | 影像技术栈 #12

@GeoffBao

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@GeoffBao

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上拉电阻定义  电源到元件间的叫上拉电阻,作用是平时使该脚为高电平地到元件间的叫下拉电阻,作用是平时使该脚为低电平;
  上拉是对器件注入电流,下拉是输出电流;弱强只是上拉电阻的阻值不同,没有什么严格区分;对于非集电极(或漏极)开路输出型电

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