Datasheet

PCF8563 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2012. All rights reserved.
Product data sheet Rev. 10 — 3 April 2012 12 of 50
NXP Semiconductors
PCF8563
Real-time clock/calendar
[1] Definition may be re-assigned by the user.
8.4.6 Register Century_months
[1] This bit may be re-assigned by the user.
[2] This bit is toggled when the register Years overflows from 99 to 00.
Table 14. Weekday assignments
Day
[1]
Bit
2 1 0
Sunday 0 0 0
Monday 0 0 1
Tuesday 0 1 0
Wednesday 0 1 1
Thursday 1 0 0
Friday 1 0 1
Saturday110
Table 15. Century_months - century flag and months register (address 07h) bit description
Bit Symbol Value Place value Description
7C
[1]
0
[2]
- indicates the century is x
1 - indicates the century is x + 1
6 to 5 - - - unused
4 MONTHS 0 to 1 ten’s place actual month coded in BCD format, see Table 16
3 to 0 0 to 9 unit place
Table 16. Month assignments in BCD format
Month Upper-digit
(ten’s place)
Digit (unit place)
Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
January 0 0 0 0 1
February 0 0 0 1 0
March 0 0 0 1 1
April00100
May00101
June00110
July00111
August01000
September 0 1 0 0 1
October10000
November10001
December10010