51 single chip computer is not connected to pull resistance p0 mouth can be a GND use-CodePudding

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51 single chip computer is not connected to pull resistance p0 mouth can be a GND use

Time：09-25

51 single chip computer is not connected to pull resistance p0 mouth can be a GND interface use

CodePudding user response:

refer to the original poster qq_45765959 response:

51 single chip computer is not connected to pull resistance p0 mouth can be a GND interface with it

P0 s can be used as a GND, but should pay attention to 1. The ability to drive 2. It is not really there may be interference signal,