STM32Hz MX Clock Configuration 480MHz

[Paul1]

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

[TDK · Accepted solution]

> Frequency is out of range for this VOS range

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

[Paul1]

Thank you TDK.

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

Paul