22.6.1.3 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 sleep mode: The CPU is stopped. Synchronous clocks are stopped except when requested. The logic is retained.
Standby sleep mode: The CPU is stopped as well as the peripherals. The logic is retained, and power domain gating can be used to reduce power consumption further.
Off sleep mode: The entire device is powered off.

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