20.5.1.2 Sleep Modes

The device can be set in a Sleep mode. In Sleep mode, the CPU is stopped and the peripherals are either active or idle, according to the Sleep mode depth:

  • Idle ode: The CPU is stopped. Synchronous clocks are stopped except when requested. The logic is retained.
  • Standby mode: The CPU is stopped as well as the peripherals. The logic is retained, and power domain gating can be used to fully or partially turn off the PDSYSRAM power domain.
  • Hibernate mode: PDCORESW power domain is turned off. The backup power domain is kept powered to allow few features to run (RTC, 32 kHz clock sources, and wake-up from external pins). The PDSYSRAM power domain can be retained according to software configuration.
  • Backup mode: Only the backup domain is kept powered to allow few features to run (RTC, 32 kHz clock sources, and wake-up from external pins). The PDBKUPRAM power domain can be retained according to software configuration.
  • Off mode: The entire device is powered off.