PCF2129AT/2,518 NXP Semiconductors, PCF2129AT/2,518 Datasheet - Page 7

• 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
Table 5.
Bit positions labeled as - are not implemented and will return 0 when read. Bits labeled as T must always be written with
logic 0. Bits labeled as X are undefined at power-on and unchanged by subsequent resets.
PCF2129AT
Product data sheet
Address Register name
0Dh
0Eh
CLKOUT control register
0Fh
Watchdog registers
10h
11h
Timestamp registers
12h
13h
14h
15h
16h
17h
18h
Aging offset register
19h
Internal registers
1Ah
1Bh
Day_alarm
Weekday_alarm
CLKOUT_ctl
Watchdg_tim_ctl
Watchdg_tim_val WATCHDG_TIM_VAL[7:0]
Timestp_ctl
Sec_timestp
Min_timestp
Hour_timestp
Day_timestp
Mon_timestp
Year_timestp
Aging_offset
Internal_reg
Internal_reg
Register overview
Bit
7
AE_D
AE_W
TCR[1:0]
WD_CD T
TSM
-
-
-
-
-
-
-
-
YEAR_TIMESTP (0 to 99)
…continued
-
-
TSOFF
MINUTE_TIMESTP (0 to 59)
-
-
-
-
6
SECOND_TIMESTP (0 to 59)
-
-
All information provided in this document is subject to legal disclaimers.
Rev. 5 — 12 February 2013
DAY_ALARM (1 to 31)
-
-
TI_TP
-
DAY_TIMESTP (1 to 31)
-
-
-
5
AMPM
HOUR_TIMESTP (0 to 23) in 24 h mode
-
-
-
-
1_O_16_TIMESTP[4:0]
MONTH_TIMESTP (1 to 12)
-
-
4
HOUR_TIMESTP (1 to 12) in 12 h mode
-
-
-
-
-
3
-
AO[3:0]
Integrated RTC, TCXO and quartz crystal
WEEKDAY_ALARM (0 to 6) 1 - - - - XXX
COF[2:0]
-
-
2
-
1
TF[1:0]
-
-
PCF2129AT
0
-
-
© NXP B.V. 2013. All rights reserved.
Reset value
1 - XX XXXX
00 - - - 000
000 - - - 11
XXXX XXXX
00 - X XXXX
- XXX XXXX
- XXX XXXX
- - XX XXXX
- - XX XXXX
- - XX XXXX
- - - X XXXX
XXXX XXXX
- - - - 1000
- - - - - - - -
- - - - - - - -
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