Event Triggered Tuning

The EVCTRL.TUNEEI and EVCTRL.TUNEINV control bits allow to start a tuning sequence on an incoming event or inverted event. On an incoming rising or falling edge of the event input, the DFLLULP close loop tuner unlock and start over a frequency tuning, depending on the configuration of the DFLLULP registers, until the tuner achieves a new lock.