Datasheet

Clock operation M41T66
22/34 Doc ID 15108 Rev 2
3.9 Initial power-on defaults
Upon application of power to the device, the register bits will initially power-on in the state
indicated in Ta bl e 5 .
Table 5. Initial power-on default values
Condition ST OF OFIE OUT AFE SQWE RS3-1 RS0 Watchdog
Initial power-up
(1)
1. All other control bits power-up in an undetermined state.
01 0 1 0 1 0 1 0
Table 6. Century bits examples
CB0 CB1 Leap year? Example
(1)
1. Leap year occurs every four years (for years evenly divisible by four), except for years evenly divisible by
100. The only exceptions are those years evenly divisible by 400 (the year 2000 was a leap year, year
2100 is not).
00Yes2000
0 1 No 2100
1 0 No 2200
1 1 No 2300