Can the STM32F7 decide whether last boot option was power on or software reset?

[arnold_w]

I want to do different things in my STM32F7-microcontroller depending on whether someone turned on power (meaning ALL components on the PCB recently started up) or the micrcontroller was reset through a software reset (meaning ONLY the STM32F7-microcontroller on the PCB is starting up). It is possible to distinguish between the cases from within the source code?

[Uwe Bonnes]

Have a look at the RCC control/status register.

[Piranha]

Yes, that's possible by checking and clearing (!!!) respective bits in RCC_CSR register.

[arnold_w]

Thank you.