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Why does Nucleo's PA 3 terminal show 3.3 V with ADC

Question asked by Ken Inoue on Jul 25, 2017
Latest reply on Jul 25, 2017 by Ken Inoue

Thank you for your patronage. I'm Japanese student. Sorry for my poor English.

I'm using STM32F334Nucleo.

Nucleo's PA 3 terminal indicates about 3.3 V in ADC in a situation where nothing is connected.

On the other hand, the PA0 terminal shows about 0V in the AD conversion in a situation where nothing is connected.

Why do these two differ?

 

 

 

 

 

 

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