Why does CubeMX show different value for cr_ker_ltdc compared to Clock Summary?

[Windows]

Hi!

I think there is some display issues with STM32CubeMX with the cr_ker_ltdc

 

If I look in the clock summary, I csn see that the ck_ker_ltdc is set to 100 MHz.

"

ck_flexgen_27 0 0 0 100000000 0 0 0 Y deviceless no_connection_id         

    ck_ker_ltdc 0 0 0 100000000 0 0 50000 N 48010000.display-controller lcd                      

                                                                                                              48000000.dsi px_clk                   

                                                                                                              deviceless no_connection_id         

       clk_pix_ltdc 0 0 0 100000000 0 0 50000 Y 48010000.display-controller ref                      

                                                                                                                 deviceless no_connection_id         

"

In this case, I need to increase the cr_pix_ltdc to above 148.5 MHz to achieve full HD at the HDMI output.

But in the CubeMX, I see that the cr_ker_ltdc is set to 25 MHz.

 

And changing the cr_ker_ltdc will affect the cr_pix_ltdc  according to the reference manual.

So is this an issue or not?

[Windows]

Here is another proof.

As you can see, ck_flexgen_28 is set to 10 MHz. That’s correct according to CubeMX.

But ck_ker_ltdc is 200 MHz in CubeMX, but in clk_summary, it’s only 40 MHz.

Why?