You can use up to 125MHz clock source to USART peripherals on H7 if you use CubeMX to configure the clock tree. Then the baudrate can be up to 125/8 or 125/16 depending on the oversampling configurations. But ST HAL driver will stop you from using ba...

I got the AC6-System Workbench version working. The problem is that the frame buffer is not aligned to 32 bytes boundary. To archive this, the link script STM32L4R9AIIx_FLASH.ld under STM32Cube_FW_L4_V1.12.0\Projects\32L4R9IDISCOVERY\Applications\STe...