PCF2129AT NXP [NXP Semiconductors], PCF2129AT Datasheet - Page 24

• Manufacturer Part Number: PCF2129AT
• Description: Integrated RTC, TCXO and quartz crystal
• Manufacturer: NXP [NXP Semiconductors]

NXP Semiconductors
PCF2129A_1
Product data sheet
8.8.6 Register Months
8.8.7 Register Years
Table 22.
Table 23.
Table 24.
Bit
7 to 5 -
4
3 to 0
Month
January
February
March
April
May
June
July
August
September
October
November
December
Bit
7 to 4 YEARS
3 to 0
Symbol
MONTHS
Symbol
Months - months register (address 08h) bit description
Month assignments in BCD format
Years - years register (address 09h) bit description
Upper-digit
(ten’s place)
Bit 4
0
0
0
0
0
0
0
0
0
1
1
1
Rev. 01 — 13 January 2010
Value
-
0 to 9
Value
0 to 9
0 to 9
0 to 1
Digit (unit place)
Bit 3
0
0
0
0
0
0
0
1
1
0
0
0
Place value Description
-
ten’s place
unit place
Place value Description
ten’s place
unit place
Bit 2
0
0
0
1
1
1
1
0
0
0
0
0
Integrated RTC, TCXO and quartz crystal
unused
actual month coded in BCD format, see
Table 23
actual year coded in BCD format
Bit 1
0
1
1
0
0
1
1
0
0
0
0
1
PCF2129A
© NXP B.V. 2010. All rights reserved.
Bit 0
1
0
1
0
1
0
1
0
1
0
1
0
24 of 68