NXP Semiconductors
PCF8563
Real-time clock/calendar
Weekday assignments
Bit
2
1
0
0
1
1
0
0
1
0
0
1
0
1
0
1
0
0
0
0
0
1
1
1
Table 14.
Day
Sunday
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
[1]
Definition may be re-assigned by the user.
8.4.6 Register Century_months
Table 15.
Bit
7
C
Century_months - century flag and months register (address 07h) bit description
Value
0
1
6 to 5 -
4
3 to 0
[1]
[2]
Symbol
Place value Description
-
-
-
ten’s place
unit place
indicates the century is x
indicates the century is x + 1
unused
actual month coded in BCD format, see
-
0 to 1
0 to 9
MONTHS
This bit may be re-assigned by the user.
This bit is toggled when the register Years overflows from 99 to 00.
Table 16.
Month
Month assignments in BCD format
Upper-digit
(ten’s place)
Bit 4
0
0
0
0
0
0
0
0
0
1
1
1
Digit (unit place)
Bit 3
0
0
0
0
0
0
0
1
1
0
0
0
Bit 2
0
0
0
1
1
1
1
0
0
0
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
January
February
March
April
May
June
July
August
September
October
November
December
PCF8563
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© NXP B.V. 2011. All rights reserved.
Product data sheet
Rev. 9 — 16 June 2011
11 of 45
PHILIPS [ NXP SEMICONDUCTORS ]
