15.2 Features
- 32.768 kHz Crystal Oscillator
               (XOSC32K)
- Programmable start-up time
 - Crystal or external input clock on XIN32 I/O
 - Clock failure detection with safe clock switch
 - Clock failure event output
 
 - 32.768 kHz High Accuracy Internal
            Oscillator (OSC32K)
- Frequency fine tuning
 - Programmable start-up time
 
 - 32.768 kHz Ultra Low-Power Internal
            Oscillator (OSCULP32K)
- Ultra low-power, always-on oscillator
 - Frequency fine tuning
 
 - 1.024 kHz clock outputs available
 
