RTCSEL=ULP1K
RTC Clock Selection
RTCSEL | RTC Clock Selection 0 (ULP1K): 1.024kHz from 32kHz internal ULP oscillator 1 (ULP32K): 32.768kHz from 32kHz internal ULP oscillator 2 (OSC1K): 1.024kHz from 32.768kHz internal oscillator 3 (OSC32K): 32.768kHz from 32.768kHz internal oscillator 4 (XOSC1K): 1.024kHz from 32.768kHz internal oscillator 5 (XOSC32K): 32.768kHz from 32.768kHz external crystal oscillator |