How to set STM32H755 sysclk to 480MHz?

[Junde]

Hi there,

According to the STM32H755 datasheet, the Cortex-M7 frequency can reach up to 480MHz.

However, when I configure the sysclk in STM32CubeMX, it shows the maximum frequency is 300MHz.

What's wrong with my config? Or is there any misunderstanding by me?

Thanks for your help!

[NesrynELMK]

Hello @judet 

 Please take a look at this article : How to reach 480MHz for STM32H7xx MCUs - STMicroelectronics Community

Kind regards,

[Imen.D]

Hello @Junde ,

I think you are selecting STM32H755xxx3!!

Try select STM32H755xxx6 with which you can reach 480MHz.