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AB08XX Datasheet(PDF) 4 Page - Abracon Corporation |
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AB08XX Datasheet(HTML) 4 Page - Abracon Corporation |
4 / 12 page AB08XX Series Real Time Clock Module Date of Issue: Sept. 10 th, 2012 3.0 x 3.0 mm ESD Sensitive Page (3) of (12) Abracon Drawing # Revision #: Initial Release 3. AB08XX Example Applications 3.1 Battery Backed Up RTC The most common AB08XX application is a battery backed up RTC, which maintains time and may hold data in RAM. The AB08XX is normally powered from a system power supply, which may be a larger battery. The AB08XX is continuously charging a supercapacitor or rechargeable battery via the internal trickle charger. When the main power supply goes away, the AB08XX automatically switches to the VBAT supply and maintains time and RAM data at very low battery supply currents. VCC VSS FOUT/nIRQ IRQ VCC VSS AM08XX MCU I2C/SPI VBAT System Power Battery/ Supercap XO XI 3.2 RTC with Interrupt Aggregation The flexible inputs of the AB08XX can be used to aggregate a variety of interrupt sources, including external digital inputs, analog levels, timers and alarms into a single interrupt source to an MCU. VCC VSS FOUT/nIRQ IRQ VCC VSS AM08XX MCU I2C/SPI System Power XO XI WDI EXTI VBAT Analog Level Digital Inputs AB08XX AB08XX |
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