I am currently working with an STM32F051K8U6. According to the docs from STMicroelectronics AN2606, page 303, this chip supports bootloading on both USART1 (PA10, PA9) and USART2 (PA3, PA2). I can get the bootloader to work fine on USART1 but not USA

[SHMorgan]

I can get the bootloader to work fine on USART1 but can't seem to get anything from USART2. Is there a trick to making the second USART port work? I have checked the output from my test serial port on the logic analyzer and it seems correct and is sending out the 0x7F to wake the chip up. No response from the chip.

[SHMorgan]

Turns out that I was referring to the wrong page in the Document, I was actually looking at the STM32L05 instead of the STM32F05, It looks like the STM32F05 used PPA14 and PA15