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@ -24,6 +24,8 @@ GPIO特点(P111):
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什么是端口(Port)什么是引脚(Pin),P111
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[视频:GPIO](https://www.bilibili.com/video/BV1zG4y1K78S/?spm_id_from=333.788&vd_source=3c8e333d6657680a469ddf0238f01d6a)
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# 2. GPIO电路结构(p112,手册105)
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