CubeMX won't allow me to set the max clock for both cores (STM32H747)

[Zaher]

Hi,

I'm trying to configure a new project for STM32H747 (dual-core) in CubeMX. As you know, the max clock for the cores are 480 MHz for the M7 and 240 MHz for the M4. However, CubeMx won't allow any input beyond 400 or 200 for M7 and M4 respectively.

Any ideas?

Zaher

[Piranha]

Adjust the voltage scale and read the AN5337.

[Zaher · Accepted solution]

** Update **

Just found this here. As @Khouloud OTHMAN​ advised, I started a new project (for MCU not board) and now problem has been solved and I can set the max clocks.

[Zaher]

Thank you. I tried that and problem has been solved, too, for board-based project with all peripherals initialized to their default values. I guess DIVM1 should be set to an appropriate value.