PCF8523 View Datasheet(PDF) - NXP Semiconductors.
Part Name
Description
MFG CO.
'PCF8523' PDF : 74 Pages View PDF
NXP Semiconductors
PCF8523
Real-Time Clock (RTC) and calendar
8.6.5 Register Weekdays
Table 17. Weekdays - weekdays register (address 07h) bit description
Bit
Symbol
Value
Description
7 to 3 -
-
unused
2 to 0 WEEKDAYS
0 to 6
actual weekday, values see Table 18
Table 18. 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
1
1
0
[1] Definition may be reassigned by the user.
8.6.6 Register Months
Table 19. Months - months register (address 08h) bit description
Bit
Symbol
Value
Place value Description
7 to 5 -
-
-
unused
4
MONTHS
3 to 0
0 to 1
0 to 9
ten’s place actual month coded in BCD
unit place format; assignments see Table 20
Table 20. Month assignments in BCD format
Month
Upper-digit Digit (unit place)
(ten’s place)
Bit
Bit
4
3
2
1
0
January
0
0
0
0
1
February
0
0
0
1
0
March
0
0
0
1
1
April
0
0
1
0
0
May
0
0
1
0
1
June
0
0
1
1
0
July
0
0
1
1
1
August
0
1
0
0
0
September 0
1
0
0
1
October
1
0
0
0
0
November
1
0
0
0
1
December
1
0
0
1
0
PCF8523
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 7 — 28 April 2015
© NXP Semiconductors N.V. 2015. All rights reserved.
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