Could you tell me the Arduino reset, IOREF, a serial port lights, USB circuit principle-CodePudding

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Could you tell me the Arduino reset, IOREF, a serial port lights, USB circuit principle

Time：09-19

CodePudding user response:

The topic main understand? I appeal to you?

CodePudding user response:

This picture is really bad,,,, a mess

CodePudding user response:

Figure is a bit of a mess

, a serial port lights should be received data or send out a needle to occur, the corresponding GPIO base level, the corresponding lamp light up