Possible to Swap USART TX/RX Pins Internally?

[Hing Chan]

Posted on April 15, 2018 at 22:26

Hello all, 

I'm currently working on a senior design project using the STM32F411CE on a PCB. It will be interfacing with the RN4020 BLE. A mistake was made during the PCB design process and the USART6 TX/RX pins were swapped. 

I was told by someone that this can be fixed by swapping the TX/RX uC pins internally, but I was unable to find anything regarding this in the datasheet. Is this possible? If so, how?

Thanks in advance.

[David SIORPAES]

Posted on April 16, 2018 at 10:05

Hello,

unfortunately, according to Alternate Functions Table 9 of DM00115249.pdf document, there is no way to swap USART6 TX/RX signals via software unless you are going to bitbang them.

I am not aware of any other means to swap them.