 Built in frequency adjusted 32.768 kHz crystal unit and DTCXO

 Interface Type : 3 wire / 4 wire SPI-Bus

Current consumption : 240 nA / 3 V (Typ.)

Auto power switching function : Automatically switches to backup power supply

by monitoring the VDD / VBAT voltage

Time stamp function : Maximum 32 time stamps

Interrupt output : Wake up every hour or every minute or every second

Alarm interruption : Day, date, hour, minute, second

Auto repeat wakeup timer interruption

Self-monitoring interruption : Crystal oscillation stop, VBAT low, VDD low