I've been working with the STM32WB55 microcontroller and have been trying to set up 4 bit trace functionality (ETM, not SWO) for debugging. I've connected the trace pins according to the datasheet and configured them in the STM32Cube software.Specifi...

My board implements this LDO use case from the user manual, no SMPS components and no SMPS circuit: I need to enable this configuration:However the device rejects ALL changes to these bits so the default configuration will not change to the LDO suppl...

I'm trying to configure my custom board to only use the internal LDO, bypassing the need for the SMPS. In fact, my board doesn't even have the SMPS components. Is this allowed? The user manual seems to suggests that we can exclude the SMPS circuit ho...