27.5.1 Power Domains

Leaving aside the domains supplied by external power pins, such as VDDREG, AVDD, VDDIO and VUSB3V3, the device is split into these internal power domains:

• VDDCORE_BU_PD
• VDDCORE_SW_PD
• VDDCORE_RAM_PD
• VDDCORE_USB_PD

VDDCORE_SW_PD: is the Switchable Power Domain. It contains the CPU and all the peripherals except those located in the backup power domain.

VDDCORE_BU_PD: Contains the backup peripherals: OSC32KCTRL, SUPC, RSTC, RTC, TRAM, and the PM itself.

VDDCORE_RAM_PD: Contains the system RAM. It can be partially or fully turned off in Standby or Hibernate mode according to the user configuration.

VDDCORE_USB_PD : Dedicated power domain containing USB-PHY.