Problem with USART baudarte on STM32l4R5ZIT

[AVagh]

Dear all,

I'am using a Nucleo-L4RZi with the STM32l4R5ZIT in combination with the software OPENSTM with STM32CubeMX plugin. Thy system clock is 120MHz, same thing for the USART clock.

If I set a baudrate of 460800 on the LPUART1, all works correctly. Instead USART1, 2,3 doesn't work with a baudrate more than 115200 (No signal on TX pin), instead with 115200 the USART1,2,3 work correctly.

Why?

If you need more informations please do not hesitate to contact me.

Thank you very much in advance for your time and help.

Best regards;

Alessandro

[AVagh]

I haven't resolved the problem, only LPUART can work with a baudrate more than 115200.