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and Embedded Temp CompensaTIon ±5ppm with Auto Daylight SavingThe ISL12022 device is a low power real TIme clock with anembedded Temp sensor for oscillator compensaTIon,clock/calendar, power fail, low battery monitor, brownoutindicator, single periodic or polled alarms, intelligentbattery-backup switching, Battery Reseal™ funcTIon and 128bytes of battery-backed user SRAM.The oscillator uses an external, low-cost 32.768kHz crystal.The real time clock tracks time with separate registers forhours, minutes, and seconds. The device has calendarregisters for date, month, year and day of the week. Thecalendar is accurate through 2099, with automatic leap yearcorrection.Daylight Savings time adjustment is done automatically,using parameters entered by the user. Power fail and batterymonitors offer user-selectable trip levels. A time stampfunction records the time and date of switchover from VDD toVBAT power, and also from VBAT to VDD power.
