Datasheet
PCA8565 All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2014. All rights reserved.
Product data sheet Rev. 4 — 5 December 2014 10 of 48
NXP Semiconductors
PCA8565
Real time clock/calendar
8.4.2 Register Minutes
8.4.3 Register Hours
8.4.4 Register Days
[1] The PCA8565 compensates for leap years by adding a 29th day to February if the year counter contains a
value which is exactly divisible by 4, including the year 00.
8.4.5 Register Weekdays
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Table 11. Register Minutes (address 03h) bits description
Bit Symbol Value Place value Description
7 - - - unused
6 to 4 MINUTES 0 to 5 ten’s place actual minutes coded in BCD format
3 to 0 0 to 9 unit place
Table 12. Register Hours (address 04h) bits description
Bit Symbol Value Place value Description
7 to 6 - - - unused
5 to 4 HOURS 0 to 2 ten’s place actual hours coded in BCD format
3 to 0 0 to 9 unit place
Table 13. Register Days (address 05h) bits description
Bit Symbol Value Place value Description
7 to 6 - - - unused
5to4 DAYS
[1]
0 to 3 ten’s place actual day coded in BCD format
3 to 0 0 to 9 unit place
Table 14. Register Weekdays (address 06h) bits description
Bit Symbol Value Description
7 to 3 - - unused
2 to 0 WEEKDAYS 0 to 6 actual weekday values, see Tab le 15