Error with STM32CubeMx 6.11.1

[RTira.1]

Hi,

I'm working on a STM32H755BIT6 with a custom PCB layout, which uses direct SMPS supply hardware configuration.

I'm migrating an existing Keil project which was created with STM32CubeMx 6.7.0 to STM32CubeMx 6.11.1 and I discovered that the option PWR_DIRECT_SMPS_SUPPLY is now unavailable.

I wonder if this is a bug from CubeMx software or if it was remove on purpose to force user use another hardware configuration?

Thanks!

[STTwo-32]

Hello @RTira.1 

Try to change the Power regulator Voltage Scale to 1 2 or 3 and not 0:

Best Regards.

STTwo-32

[RTira.1]

Thank you for your fast response STTwo-32, now PWR_DIRECT_SMPS_SUPPLY option is available in CubeMx 6.11.1.

However, in the project I want to run the microcontroller at 480 MHz, which requires "Voltage Scale 0" option.

This means that is not possible to run it in this condition using DIRECT SMPS as supply source when created with CubeMx 6.11.1? Why?

Because in the current project which was created with STM32CubeMx 6.7.0 I was able to do it and works well.

Is there a recommendation to not use the "Direct SMPS supply" when running at maximum CPU speed? I may change my hardware set up in order to do so.

Thank you again

[STTwo-32 · Accepted solution]

Hello @RTira.1 

As you can see here on the DS12919, Scale 0 is available only with LDO regulator.

Best Regards.

STTwo-32