If I try to change frequency to 400 MHz then IDE show popup window: "Frequency searched for is out of range for this VOS range".

[LSet.1]

The maximum frequency I can set is 200 MHz.

STM32H743VIT6

CubeIDE 1.6.1

[TDK]

You can change it manually. Change DIVN1 to 64 and adjust DxPPREx to respect max timings.

[LSet.1]

Thank you! It's works. It seems to me that in the previous version of IDE these indicators were set automatically.

[waclawek.jan]

And what is your VOS setting?

JW

[LSet.1]

Sorry I'm a newbie in STM32 and may misunderstand the acronyms. If it's register PWR_D3CR_VOS, then VOS_0 = 1 and VOS_1 = 1.

I have "DevEBox" development board. ST-LINK conntect by SWD mode.

[waclawek.jan]

And are these values somehow set in CubeMX, too?

Maybe the "Power regulator voltage sc." in the picture you've posted.

I don't use CubeMX.

JW

[Tesla DeLorean]

DevEBox / WeAct boards here certainly run up to 400-480 MHz when coded in HAL directly.

CubeMX/IDE clock fitter blocking would seem like an app level issue, and missing some settings somewhere.

[MEdgerton · Accepted solution]

I looked this up and found that changing the RCC setting Power Regulator Voltage scale to 0 fixed this.

It appears to be a new setting in STM32CuveIDE (I started on 1.3.1). It appears to default to the wrng setting..... correct me if this is wrong as there is no documentation, only what I read elsewhere.

Mark

[LMI2]

Yes. They are somewhere there in the CubeMx.

[waclawek.jan]

> there is no documentation

The relationship between the VOS setting and maximum frequency is documented in the Datasheet.

JW