PCF8523 NXP [NXP Semiconductors], PCF8523 Datasheet - Page 21

• Manufacturer Part Number: PCF8523
• Description: Real-Time Clock (RTC) and calendar
• Manufacturer: NXP [NXP Semiconductors]

NXP Semiconductors
PCF8523
Product data sheet
8.6.5 Register Weekdays
8.6.6 Register Months
Table 15.
Table 16.
[1]
Table 17.
Table 18.
Bit
7 to 3
2 to 0
Day
Sunday
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Bit
7 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.
[1]
Symbol
-
WEEKDAYS
Symbol
-
MONTHS
Weekdays - weekdays register (address 07h) bit description
Weekday assignments
Months - months register (address 08h) 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
All information provided in this document is subject to legal disclaimers.
Bit
2
0
0
0
0
1
1
1
Rev. 3 — 30 March 2011
Digit (unit place)
Bit
3
0
0
0
0
0
0
0
1
1
0
0
0
Value
-
0 to 6
Value
-
0 to 1
0 to 9
1
0
0
1
1
0
0
1
2
0
0
0
1
1
1
1
0
0
0
0
0
Description
unused
actual weekday, values see
Place value Description
-
ten’s place
unit place
Real-Time Clock (RTC) and calendar
unused
actual month coded in BCD
format; assignments see
1
0
1
1
0
0
1
1
0
0
0
0
1
0
0
1
0
1
0
1
0
PCF8523
Table 16
© NXP B.V. 2011. All rights reserved.
0
1
0
1
0
1
0
1
0
1
0
1
0
Table 18
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