Rainbow-electronics DS1286 Manual do Utilizador Página 1

1 of 13 111999FEATURES Keeps track of hundredths of seconds,seconds, minutes, hours, days, date of themonth, months, and years; valid leap yearcompe

DS128610 of 13WRITE CYCLE 2 (Notes 2, 8)TIMING DIAGRAM: INTERRUPTOUTPUTS PULSE MODE (SEE NOTES 11, 12)POWER-DOWN/POWER-UP CONDITION

DS128611 of 13POWER-UP/POWER-DOWN CONDITIONPARAMETER SYMBOL MIN TYP MAX UNITS NOTESCE at VIH before Power-DowntPD0µsVCC slew from 4.5V to 0V (CE at

DS128612 of 13NOTES:1. WE is high for a read cycle.2. OE = VIH or VIL. If OE = V IH during write cycle, the output buffers remain in a high imped

DS128613 of 13DS1286 WATCHDOG TIMEKEEPERPKG 28-PINDIM MIN MAXA IN.MM1.52038.611.54039.12B IN.MM0.69517.650.72018.29C IN.MM0.3508.890.3759.52`D IN.

DS12862 of 13adjusted for months with less than 31 days, including correction for leap year. The Watchdog Timekeeperoperates in either 24-hour or 12-h

DS12863 of 13WATCHDOG TIMEKEEPER REGISTERSThe Watchdog Timekeeper has 64 registers which are 8 bits wide that contain all of the Timekeeping,Alarm, Wa

DS12864 of 13BLOCK DIAGRAM Figure 1

DS12865 of 13DS1286 WATCHDOG TIMEKEEPER REGISTERS Figure 2

DS12866 of 13TIME OF DAY REGISTERSRegisters 0, 1, 2, 4, 6, 8, 9, and A contain Time of Day data in BCD. Ten bits within these eight registersare not u

DS12867 of 13WATCHDOG ALARM REGISTERSRegisters C and D contain the time for the Watchdog Alarm. The two registers contain a time count fromto 99.99 se

DS12868 of 13TIME OF DAY ALARM MASK BITS Figure 3REGISTER(3)MINUTES (5)HOURS (7)DAYS1 1 1 ALARM ONCE PER MINUTE0 1 1 ALARM WHEN MINUTES MATCH0 0 1 ALA

DS12869 of 13AC ELECTRICAL CHARACTERISTICS (0°C to 70°C; VCC = 4.5V to 5.5V)PARAMETER SYMBOL MIN TYP MAX UNITS NOTESRead Cycle Time tRC15