4.17.11.1 Description

The asynchronous partial wake-up wakes up a peripheral in a fully asynchronous way when activity is detected on the communication line. The asynchronous partial wake-up function automatically manages the peripheral clock. It reduces overall power consumption of the system by clocking peripherals only when needed.

Asynchronous partial wake-up can be enabled in ULP1 or Active mode.

Only the following peripherals can be configured with asynchronous partial wake-up: FLEXCOMx.

The peripheral selected for asynchronous partial wake-up must first be configured so that its clock is enabled. To do so, configure PMC_PCR.PID and write a ‘1 to PMC_PCR.EN.