I'm trying to understand the USART1 boot loader operation on STM32C031F6P6. AN606 rev 63 pg 53 says USART1 Rx/Tx must be on PA11/PA12 (TSSOP20), but CubeMX 6.11.1 does not let me assign those functions to those pins. CubeMX wants to assign USART1_TX ...