STM32G474RE PA3/PC5 pin.

Forum|Forum|2 years ago
December 28, 2023
2 replies
3542 views

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?

STM32Cube MCUs packages

Best answer by STTwo-32

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

TDK

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

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ENGIN TANRIKULUAuthor

Associate III

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.

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ENGIN TANRIKULUAuthor

Associate III

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

STTwo-32Best answer

ST Technical Moderator

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

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