20.5.1.1 Power Domains

Leaving aside the supply domains, such as AVDD and VDD, the device is split into these power domains: PDCORESW, PDBACKUP, PDSYSRAM and PDBKUPRAM.

PDCORESW, PDSYSRAM and PDBKUPRAM are "switchable power domains". In Standby, Hibernate or Backup mode, these power domains can be turned OFF to save leakage consumption according to user configuration.
  • PDCORESW: contains the CPU and all the peripherals, except those located in the backup power domain.
  • PDBACKUP: contains the backup peripherals: OSC32KCTRL, SUPC, RSTC, RTC and the PM itself.
  • PDSYSRAM: contains the system RAM. It can be partially or fully turned OFF in Standby or Hibernate mode according to user configuration.
  • PDBKUPRAM: contains the backup RAM. It can be partially or fully turned OFF in Backup mode.