voltage regulator in stm32f407vgt6

[Vtrai]

what is the role of voltage regulator in stm32f407vgt6 and how it works..that means already VDD is supplyng 1.8V and again what is the need of suplying 1.2V and how it works i want to know exact operation of it in stm32f407vgt6

[waclawek.jan]

The MCU core logic runs out of the voltage generated by that LDO. It works exactly like any other linear voltage regulator, except it's output voltage can be slightly adjusted by the VOS bit.

JW

[Imen GH]

Hello,

Please find attached the RM0090 Rev 18 link  ( section: Power controller PWR ) for more clarification

Regards