Resolved! Incorrect USART3 pins listed for Bootloader Activation in STM32H523xx/533xx devices in AN2606
The pins for USART3 are listed as PD9 and PD8; however, these are not available on the microcontroller.What are the correct pins? Similar to posts:https://community.st.com/t5/stm32-mcus-products/stm32h5-bootloader-uses-usart-pins-that-do-not-match-ro...