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PCF2123TS датащи(PDF) 14 Page - NXP Semiconductors

номер детали PCF2123TS
подробное описание детали  SPI Real time clock/calendar Time keeping application
PDF  63 Pages
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производитель  NXP [NXP Semiconductors]
домашняя страница  http://www.nxp.com
Logo NXP - NXP Semiconductors

PCF2123TS датащи(HTML) 14 Page - NXP Semiconductors

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PCF2123
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2011. All rights reserved.
Product data sheet
Rev. 5 — 27 April 2011
14 of 63
NXP Semiconductors
PCF2123
SPI Real time clock/calendar
8.4.4 Register Days
[1]
The PCF2123 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.
8.4.5 Register Weekdays
[1]
Definition may be re-assigned by the user.
8.4.6 Register Months
Table 12.
Days - days register (address 05h) bit description
Bit
Symbol
Value
Place value Description
7 to 6
-
-
-
unused
5to4
DAYS[1]
0 to 3
ten’s place
actual day coded in BCD format
3to0
0to 9
unit place
Table 13.
Weekdays - weekdays register (address 06h) bit description
Bit
Symbol
Value
Description
7 to 3
-
-
unused
2to0
WEEKDAYS
0to 6
actual weekday values, see Table 14
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
110
Table 15.
Months - months register (address 07h) bit description
Bit
Symbol
Value
Place value Description
7 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



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