7.2.4 Internal Power Domains

There are a variety of internal regulated power domains (nominal 1.2v) as shown:

  • VDDCORE_BU: Powers the backup domain
  • VDDCORE_SW: This is the main voltage domain for the CPU, bus and most peripherals
  • VDDCORE_PLL: This domain is for the high speed clock PLL
  • VDDCORE_USBn: This domain powers the USB PHYs
  • VDDCORE_RAM: This domain is used to retain the System SRAM