pca8565a NXP Semiconductors, pca8565a Datasheet - Page 12

• Manufacturer Part Number: pca8565a
• Description: Real-time Clock/calendar
• Manufacturer: NXP Semiconductors

NXP Semiconductors
PCA8565A_2
Product data sheet
8.4.6 Register Century_months
Table 16.
[1]
Table 17.
[1]
[2]
Table 18.
Day
Sunday
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Bit
7
6 to 5 -
4
3 to 0
Month
January
February
March
April
May
June
July
August
September
October
November
December
Definition may be re-assigned by the user.
This bit may be re-assigned by the user.
This bit is toggled when the register Years overflows from 99 to 00.
[1]
Symbol
C
MONTHS
[1]
Weekday assignments
Century_months - century flag and months register (address 07h) bit description
Month assignments in BCD format
Upper-digit
(ten’s place)
Bit 4
0
0
0
0
0
0
0
0
0
1
1
1
Value
0
1
-
0 to 1
0 to 9
[2]
Rev. 02 — 4 December 2009
Bit
2
0
0
0
0
1
1
1
Place value Description
-
-
-
ten’s place
unit place
Digit (unit place)
Bit 3
0
0
0
0
0
0
0
1
1
0
0
0
indicates the century is x
indicates the century is x + 1
unused
actual month coded in BCD format, see
1
0
0
1
1
0
0
1
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
Real-time clock/calendar
PCA8565A
0
0
1
0
1
0
1
0
© NXP B.V. 2009. All rights reserved.
Bit 0
1
0
1
0
1
0
1
0
1
0
1
0
Table 18
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