X1B0003110001

- Interface type I2C-Bus interface Fast-Mode 400 kHz - Auto power switch function The VDD voltage is monitored and it switches to the backup power supply by the automatic operation Backup power supply switching voltage 1.2V Min. - Clock output function Output frequency is selectable from 32.768 kHz, 1024 Hz, 1 Hz - Wakeup timer function Selectable from 244 μs to 7.5 years (16 bit x 1 ch.) Timer source clock selectable from 1/3600 Hz, 1/60 Hz, 1 Hz, 64 Hz, 4096 Hz. Auto release after interrupt output from /IRQ pin at timer completes This operation is auto repeat with a selected cycle, it can be used like a watchdog timer - Backup battery charge control function Stop charging automatically by detecting the full charge. Records in the register detecting the backup power supply Voltage decrease - Reset function with a delay When the main power is supplied, reset output is released. The reset/release voltage is selected by the register (2 types) Delay time of release from backup mode is 60ms Min.

Key features

• Built-in frequency adjusted 32.768 kHz crystal unit
• Interface Type ：I2C-Bus
• Low backup current ：300 nA Typ. / 3 V
• Auto power switching function ：Automatically switches to backup power supply by monitoring the VDD 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, VBAT low, VDD low