• Built-in frequency adjusted 32.768 kHz crystal unit
• Interface Type :I 2 C-Bus
• Low backup current :300 nA Typ. / 3 V
• Auto power switching function :Automatically switches to backup power supply
by monitoring the V DD voltage
• Backup battery charge control function :For the rechargeable battery
• Reset functions with a delay :Detect a main power supply and remove the reset
• Interrupt output :Wake up every minute or every second
• Alarm interruption :Day, date, hour, minute, second
• Auto repeat wakeup timer interruption
• Self-monitoring interruption :Crystal oscillation stop, V BAT low, V DD low