How to remap usart3 pins

[BobWithBigNose]

hi,

In STM32G070C, it seems there is no remap mechanism to select wich pin(PC5,or PC11) should be used for USART3_RX.

if i configure PC5 and PC11 are USART3_RX all at once, simultaneously, what will happen?

Best regards

 

 

[gbm]

That’s quite simple. You should configure exactly ONE pin as RX by setting AFR and MODER registers. If you configure more than one pin as RX, the chip behavior is unspecified (surely it behaves in some way but it is not documented).