PCF8563TF4.118 Datasheet, PDF (12/50 Pages) NXP Semiconductors – Real-time clock/calendar

NXP Semiconductors
PCF8563
Real-time clock/calendar
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
Saturday
1
1
0
[1] Definition may be re-assigned by the user.
8.4.6 Register Century_months
Table 15. Century_months - century flag and months register (address 07h) bit description
Bit Symbol Value Place value Description
7
C^[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
[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 16. Month assignments in BCD format
Month
Upper-digit Digit (unit place)
(ten’s place)
Bit 4
Bit 3
Bit 2
January
0
0
0
February
0
0
0
March
0
0
0
April
0
0
1
May
0
0
1
June
0
0
1
July
0
0
1
August
0
1
0
September 0
1
0
October
1
0
0
November
1
0
0
December
1
0
0
Bit 1
0
1
1
0
0
1
1
0
0
0
0
1
Bit 0
1
0
1
0
1
0
1
0
1
0
1
0
PCF8563
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 10 — 3 April 2012
© NXP B.V. 2012. All rights reserved.
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