Nucleo-H755ZI-Q wrong HSE setting ?

[ADesp.1]

Hello, 

From the UM2408 document, the HSE is connected to ST-Link MCO output which is supposed to be 8MHz.
When you select Nucleo-H755ZI-Q board, the HSE input is locked to 25MHz. 

Is it a CubeMX bug or does the MCO clock really 25MHz ? 

[TDK]

It's grayed out, which means HSE is not enabled.

Enable HSE in the RCC tab and you can set it to 8 MHz or whatever the ST-Link is outputting, which is configurable in the ST-Link firmware upgrade.

By default, it should be set to HSE Bypass at 8 MHz.

 

[ADesp.1]

That was an easy find, I should have a deeper look before !
Thanks a lot