PCF2129AT/2,518 NXP Semiconductors, PCF2129AT/2,518 Datasheet - Page 25
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PCF2129AT/2,518
Manufacturer Part Number
PCF2129AT/2,518
Description
Real Time Clock
Manufacturer
NXP Semiconductors
Series
PCF2129r
Datasheet
1.PCF2129AT2518.pdf
(73 pages)
Specifications of PCF2129AT/2,518
Rohs
yes
Function
Clock, Calendar, Alarm, Watchdog, Timestamp
Rtc Bus Interface
I2C, SPI
Date Format
Binary
Time Format
Binary
Supply Voltage - Max
4.2 V
Supply Voltage - Min
1.2 V
Maximum Operating Temperature
+ 60 C
Minimum Operating Temperature
- 15 C
Mounting Style
SMD/SMT
Package / Case
SOP-20
Battery Backup Switching
Yes
Factory Pack Quantity
2000
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
PCF2129AT/2,518
Manufacturer:
NXP/恩智浦
Quantity:
20 000
NXP Semiconductors
PCF2129AT
Product data sheet
8.8.6 Register Months
8.8.7 Register Years
8.8.8 Setting and reading the time
Table 23.
Table 24.
Table 25.
Figure 13
During read/write operations, the time counting circuits (memory locations 03h through
09h) are blocked.
This prevents
Bit
3 to 0
Month
Bit
7 to 5 -
4
January
February
March
April
May
June
July
August
September
October
November
December
7 to 4 YEARS
3 to 0
•
•
Faulty reading of the clock and calendar during a carry condition
Incrementing the time registers during the read cycle
Symbol
MONTHS
Symbol
shows the data flow and data dependencies starting from the 1 Hz clock tick.
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
All information provided in this document is subject to legal disclaimers.
Rev. 5 — 12 February 2013
Value
-
0 to 1
0 to 9
Value
0 to 9
0 to 9
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 24
actual year coded in BCD format
Bit 1
0
1
1
0
0
1
1
0
0
0
0
1
PCF2129AT
© NXP B.V. 2013. All rights reserved.
Bit 0
1
0
1
0
1
0
1
0
1
0
1
0
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