Which peripherals clock need to be enabled?

[T B]

For the most of the peripheral (e.g. ADC1) it is obvious, but what is with

LL_APB2_GRP1_PERIPH_SYSCFG or LL_APB1_GRP1_PERIPH_PWR?

Does the voltage regulator work, if PWR peripherals clock is disabled?

[waclawek.jan]

You did not care to tell us which STM32 model are you using, but generally, the first bit enables the PWR (Power control) module, the second the SYSCFG (System configuration controller) module. See chapters with these names in the RM (Reference Manual) for your STM32 model.

> Does the voltage regulator work, if PWR peripherals clock is disabled?

Yes; but you can't change its settings.

JW