20.5.4.1 SleepWalking

SleepWalking is the capability for a device to temporarily wake up clocks for a peripheral to perform a task without waking up the CPU from Standby mode. At the end of the sleepwalking task, the device can either be woken p by an interrupt (from a peripheral involved in SleepWalking) or enter again into Standby mode. In this device, SleepWalking is supported only on GCLK clocks by using the on-demand clock principle of the clock sources.

In Standby mode, when SleepWalking is ongoing:

  • All the power domains are turned ON including PDRAM power domain.
  • The MAINVREG regulator used to execute the sleepwalking task is the selected regulator used in active mode (LDO or Buck converter). Low-Power mode of the MAINVREG is not activated during sleepwalking.

These are illustrated in the figure below.

Figure 20-2. Operating Conditions and SleepWalking