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STM32Hz MX Clock Configuration 480MHz

Paul1
Lead

I have two STM32H7 designs

  • STM32H743IIK, Clock = 480MHz/240MHz
  • STM32H743ZIT, Clock = Can't set 480MHz/240MHz (on Nucleo-H743ZI2)
  • Using STM32CubeMX 6.3.0

- Clock Resolver always seems to always choose lower MHz like 120 or 64MHz

- I tried a new blank project but gives same limits, so doesn't seem to be a module I'm using.

- Entering 480 at "480 MHz max" or 240 at "240 MHz max" gives a popup="Frequency is out of range for this VOS range"

- Starting at left and keeping everything clean ends up with 480MHz at "480MHz max" highlighted as error - why? Hovering over it says "D1CPRE clock frequency must be <=300MHz", but works OK on my first H7 project with 480MHz/240MHz.

What am I doing wrong, or is there a bug in MX?

Paul

1 ACCEPTED SOLUTION

Accepted Solutions
TDK
Guru

> Frequency is out of range for this VOS range

Go into RCC and set VOS range to 0 in Power Parameters.

If you feel a post has answered your question, please click "Accept as Solution".

View solution in original post

2 REPLIES 2
TDK
Guru

> Frequency is out of range for this VOS range

Go into RCC and set VOS range to 0 in Power Parameters.

If you feel a post has answered your question, please click "Accept as Solution".
Paul1
Lead

Thank you TDK.

Looks like the defaults changed for VOS since first project was created, something else for us to study :)

Paul