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PCA8565BS Datasheet(PDF) 9 Page - NXP Semiconductors

Part # PCA8565BS
Description  Real time clock/calendar
Download  39 Pages
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Manufacturer  NXP [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo NXP - NXP Semiconductors

PCA8565BS Datasheet(HTML) 9 Page - NXP Semiconductors

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PCA8565_2
© NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 02 — 16 June 2009
9 of 39
NXP Semiconductors
PCA8565
Real time clock/calendar
[1]
Values shown in decimal.
[1]
Values shown in decimal.
[1]
The PCA8565 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.
[2]
Values shown in decimal.
[1]
Values shown in decimal.
Table 9.
Seconds coded in BCD format
Seconds value in
decimal
Upper-digit (ten’s place)
Digit (unit place)
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
00
0000000
01
0000001
02
0000010
:
09
0001001
10
0010000
:
58
1011000
59
1011001
Table 10.
Register Minutes (address 03h) bits description
Bit
Symbol
Value
Place value Description
7
-
-
-
unused
6 to 4 MINUTES
0 to 5[1]
ten’s place
actual minutes coded in BCD format
3 to 0
0 to 9[1]
unit place
Table 11.
Register Hours (address 04h) bits description
Bit
Symbol
Value
Place value Description
7 to 6 -
-
-
unused
5 to 4 HOURS
0 to 2[1]
ten’s place
actual hours coded in BCD format
3 to 0
0 to 9[1]
unit place
Table 12.
Register Days (address 05h) bits description
Bit
Symbol
Value
Place value Description
7 to 6 -
-
-
unused
5to4 DAYS[1]
0to3[2]
ten’s place
actual day coded in BCD format
3 to 0
0 to 9[2]
unit place
Table 13.
Register Weekdays (address 06h) bits description
Bit
Symbol
Value
Description
7 to 3 -
-
unused
2 to 0 WEEKDAYS
0 to 6[1]
actual weekday values, see Table 14


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