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X1227 pdf datasheet (CPU Super

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The X1227 device is a Real TIme Clock withclock/calendar, two polled alarms with integrated 512x8EEPROM, oscillator compensaTIon, CPU Supervisor(POR/LVS and WDT) and battery backup switch.The oscillator uses an external, low-cost 32.768kHzcrystal. All compensaTIon and trim components areintegrated on the chip. This eliminates several externaldiscrete components and a trim capacitor, savingboard area and component cost.
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