I am having weird issue with STM32F767 (configured to run at 200mhz) that needs to be SPI slave .. I configured it with 0,1 (clock low, second edge), hardware cs.. when master sends data at 350kbps everything is ok, when master sends at higher speeds...

I have issues getting usart1 and spi4 to work..USART1 "supposedly" work (software side do not complain) but USART1_TX pin is dead, there is nothing exiting this pin, scope shows it is dead. Same on multiple stm32f767zgt6 chips so it is not a dead chi...