13.8.6.4.1 Power Domain Configuration

When entering Standby Sleep mode, a power domain is set automatically to retention state if no activity is required in it; refer to 13.8.6.3.6 Power Domain Controller for details. This behavior can be changed by writing the Power Domain Configuration bit group in the Standby Configuration register (STDBYCFG.PDCFG). For example, all power domains can be forced to remain in an active state during the Standby Sleep mode, which will accelerate wake-up time.