pca8565a NXP Semiconductors, pca8565a Datasheet - Page 11

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

NXP Semiconductors
PCA8565A_2
Product data sheet
8.4.2 Register Minutes
8.4.3 Register Hours
8.4.4 Register Days
8.4.5 Register Weekdays
The VL flag is intended to detect the situation when V
under battery operation. Should the oscillator stop or V
re-asserted, then the VL flag is set. This will indicate that the time may be corrupted.
Table 12.
Table 13.
Table 14.
[1]
Table 15.
Bit
7
6 to 4 MINUTES
3 to 0
Bit
7 to 6 -
5 to 4 HOURS
3 to 0
Bit
7 to 6 -
5 to 4 DAYS
3 to 0
Bit
7 to 3 -
2 to 0 WEEKDAYS
The PCA8565A 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.
Symbol
-
Symbol
Symbol
Symbol
Minutes - minutes register (address 03h) bit description
Hours - hours register (address 04h) bit description
Days - days register (address 05h) bit description
Weekdays - weekdays register (address 06h) bit description
[1]
Value
-
0 to 5
0 to 9
Value
-
0 to 2
0 to 9
Value
-
0 to 3
0 to 9
Rev. 02 — 4 December 2009
Value
-
0 to 6
Place value Description
-
ten’s place
unit place
Place value Description
-
ten’s place
unit place
Place value Description
-
ten’s place
unit place
Description
unused
actual weekday values, see
unused
actual minutes coded in BCD format
unused
actual hours coded in BCD format
unused
actual day coded in BCD format
DD
DD
is decreasing slowly, for example
reach V
Table
Real-time clock/calendar
low
PCA8565A
16.
before power is
© NXP B.V. 2009. All rights reserved.
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