STM32CubeMx doesn't appear to be setting CSSON bit for STM32U5

[AGula.1]

I'm configuring an STM32U575 within the STM32CubeMx tool where the HSE clock is being used. I'm trying to enable the CSS for the HSE clock via the Clock Configuration menu, however enabling/disabling the CSS via this tool doesn't seem to actually set the RCC->CSSON bit. I can configure this CSSON bit manually, but just wanted to check before doing so.

[Ghofrane GSOURI · Accepted solution]

Hello @AGula.1​ 

First let me thank you for posting.

Please follow those steps to set RCC->CSSON bit correctly using CubeMX 6.8.1

1- Make sure that you choose HSE : Crystal /Ceramic Resonator

2- under [Clock configuration] choose HSE as an input for System clock MUX then click on CSS enable
3- generate and debug the code

 

BR,

Ghofrane