13.8.6.4.2 Linked Power Domains

Power domains can be linked to each other by using the Link Power Domain bit group in the Standby Configuration register (STDBYCFG.LINKPD). When PDn (n=0,1) is active, the linked power domain(s) of higher index PDm (m>n) will be in active state even if there is no activity in PDm.

When for example a static SleepWalking task is ongoing in PD0 while the device is in standby sleep mode and PD1 is linked to PD0 (LINKPD=PD01), then PD1 and PD0 are kept in active state. If dynamic SleepWalking is configured, the power state of PD1 will follow the state of PD0.