27.5.2 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:

• Active mode: CPU is running, all power domains are active.
• Idle Sleep mode: The CPU is stopped. Synchronous clocks are stopped except when requested. The logic state is retained.
• Standby Sleep mode: The CPU is stopped as well as the peripherals. The logic state is retained, and power domain gating can be used to off the VDDCORE_RAM_PD power domain.
• Hibernate Sleep mode: VDDCORE_SW_PD power domain is turned OFF. The VDDCORE_BU_PD backup power domain is kept powered to allow few features to run (RTC, 32KHz clock sources, and wake-up from external pins). The VDDCORE_RAM_PD power domain can be retained according to software configuration.
• Backup Sleep mode: Only the 3.3 V backup domain (VDD_BU_PD)is kept powered to allow few features to run (RTC, 32KHz clock sources, and wake-up from external pins).
• Off Sleep mode: The entire device is powered off.