... after the data mode bit has been written toallow the real time clock to update the time and calendar bytes. Once initialized, the real time clock makes all updates in the selected mode. The data ... nonvolatile time-of-day clock, an alarm, a one-hundred-year calendar, programmableinterrupt, square wave generator, and 113 bytes of nonvolatile static RAM. The real time clock isdistinctive in ... 10,11(tA=25°C)PARAMETER SYMBOL MIN TYP MAX UN ITS N OTESExpected Data Retention tDR10 years 10,11Note:The real time clock will keep time to an accuracy of ±1 minute per month during data retention time forthe...