STM32G474RE PA3/PC5 pin.

[ENGIN TANRIKULU]

Hello,
STM32G474RE is the processor model I use.
I read ADC from pin PA3 and I read IO from pin PC5. So whether these pins are common pins in the processor hardware? How can I separate these two pins from each other?

[TDK]

PA3 and PC5 are separate pins. There is no problem using one as ADC and one as GPIO.

[ENGIN TANRIKULU]

When I checked with a multimeter, I confirmed that it went to the same pin. ADC_IN4 and IO are affected when I use it in input mode.

[TDK]

Is this a custom board? Maybe you have a short.

[ENGIN TANRIKULU]

No, I checked it on two different Nucleo cards without using a special card.

[STTwo-32 · Accepted solution]

Hello @ENGIN TANRIKULU 

As said @TDK PA3 and PC5 are separate pins on the MCU. But on the NUCLEO-G474RE, both pin 37 and pin 6 of the CN10 are connected to PC5. To connect the pin 37 to PA3, you should configure the solder bridge as described on the Table 11 of the UM2505. 

Best Regards.

STTwo-32