33.16.1 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 sys- tem by clocking peripherals only when needed.

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

Only the following peripherals can be configured with asynchronous partial wake-up: FLEXCOMx, SPIx, TWIx, UARTx and ADC.

The peripheral selected for asynchronous partial wake-up must be first configured so that its clock is enabled by setting the appropriate PIDx bit in PMC_PCERx.