PCF2129AT/2,518 NXP Semiconductors, PCF2129AT/2,518 Datasheet - Page 23

• Manufacturer Part Number: PCF2129AT/2,518
• Description: Real Time Clock
• Manufacturer: NXP Semiconductors
• Series: PCF2129r

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

NXP Semiconductors
PCF2129AT
Product data sheet
8.8.1 Register Seconds
8.8.2 Register Minutes
8.8 Time and date function
Most of these registers are coded in the Binary Coded Decimal (BCD) format.
Table 16.
[1]
Table 17.
Table 18.
Bit
Seconds value in
decimal
00
01
02
:
09
10
:
58
59
Bit
7
6 to 4 SECONDS
3 to 0
7
6 to 4 MINUTES
3 to 0
Start-up value.
Symbol
OSF
Symbol
-
Seconds - seconds and clock integrity register (address 03h) bit description
Seconds coded in BCD format
Minutes - minutes register (address 04h) bit description
All information provided in this document is subject to legal disclaimers.
Upper-digit (ten’s place)
Bit 6
0
0
0
:
0
0
:
1
1
Rev. 5 — 12 February 2013
Value
0
1
0 to 5
0 to 9
Value
-
0 to 5
0 to 9
[1]
Bit 5
0
0
0
:
0
0
:
0
0
Place value Description
-
-
ten’s place
unit place
Place value Description
-
ten’s place
unit place
Bit 4
0
0
0
:
0
1
:
1
1
Integrated RTC, TCXO and quartz crystal
Digit (unit place)
Bit 3
0
0
0
:
1
0
:
1
1
clock integrity is guaranteed
clock integrity is not guaranteed:
actual seconds coded in BCD format
unused
actual minutes coded in BCD format
oscillator has stopped and chip reset
has occurred since flag was last cleared
Bit 2
0
0
0
:
0
0
:
0
0
PCF2129AT
Bit 1
0
0
1
:
0
0
:
0
0
© NXP B.V. 2013. All rights reserved.
0
1
0
1
0
0
1
Bit 0
:
:
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