PA7 pin voltage problem (STM32f767zi)

[Paul_TESSON]

Hello, I would like to ask you to know how it is that the PA5 pin in OUTPUT (non-pullup and non-pulldown) delivers a voltage of only 2.6 V instead of 3.3 V like the others?
Thanks in advance

[SofLit]

Hello @Paul_TESSON 

You question is not clear!

Which GPIO? PA7 or PA5?

In which config? Output Push Pull or Output Open Drain?

Could you please show us the code of your pin configuration?

[TDK]

Probably you have a hardware issue, like something else pulling down the pin, or an unexpected short, or other hardware gremlin.

[Paul_TESSON]

PA7 sorry

[Paul_TESSON]

I tested on 3 st32f767zi, same problem

[SofLit]

Please provide your schematics if you are using a custom board or tell us on which ST board you're doing the test.

Also provide your code.

[Paul_TESSON]

I use a STM32F767ZI (Nucleo) 
You can see thanks to the link my code :
https://github.com/TESSON-MAKER/Test_Pin_PA7/

[TDK · Accepted solution]

Per the schematic and the user manual, PA7 is used by the ethernet. If you want to use it through the header pins, you can isolate it from the ethernet by removing the JP6 jumper.