11.3.5 Sleep Mode Operation

If there is no ongoing NVM write/erase operation, the NVMCTRL will enter sleep mode when the system enters sleep mode.

If an NVM write/erase operation is ongoing when the system enters a sleep mode, the NVM block, the NVMCTRL, and the peripheral clock will remain ON until the operation is finished and automatically turn off once the operation is completed. This is valid for all sleep modes, including Power-Down.

The NVM Ready interrupt will wake up the device only from Idle sleep mode.