PCF2129AT/1,512 NXP Semiconductors, PCF2129AT/1,512 Datasheet - Page 7

• Manufacturer Part Number: PCF2129AT/1,512
• Description: IC REAL TIME CLK/CALENDAR 20SOIC
• Manufacturer: NXP Semiconductors
• Type: Clock/Calendar/Alarmr

Specifications of PCF2129AT/1,512

• Package / Case: 20-SOIC (7.5mm Width)
• Date Format: YY-MM-DD-dd
• Time Format: HH:MM:SS (12/24 hr)
• Interface: I²C, SPI
• Voltage - Supply: 1.8 V ~ 4.2 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Function: Clock, Alarm, Watchdog, Timestamp
• Supply Voltage (max): 4.2 V
• Supply Voltage (min): 1.8 V
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Rtc Bus Interface: I2C, SPI
• Supply Current: 800 uA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Memory Size: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 568-4960-5; 935288599512

NXP Semiconductors
Table 4.
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.
PCF2129A_2
Product data sheet
Address Register name
Control registers
00h
01h
02h
Time and date registers
03h
04h
05h
06h
07h
08h
09h
Alarm registers
0Ah
0Bh
0Ch
0Dh
0Eh
CLKOUT control register
0Fh
Watchdog registers
10h
11h
Timestamp registers
12h
13h
14h
15h
16h
17h
18h
Aging offset register
19h
Control_1
Control_2
Control_3
Seconds
Minutes
Hours
Days
Weekdays
Months
Years
Second_alarm
Minute_alarm
Hour_alarm
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
Register overview
Bit
7
EXT_
TEST
PWRMNG[2:0]
OSF
-
-
-
-
-
YEARS (0 to 99)
AE_S
AE_M
AE_H
AE_D
AE_W
TCR[1:0]
WD_CD T
TSM
-
-
-
MSF
-
-
YEAR_TIMESTP (0 to 99)
-
WDTF
SECONDS (0 to 59)
MINUTES (0 to 59)
-
-
-
SECOND_ALARM (0 to 59)
MINUTE_ALARM (0 to 59)
-
-
-
TSOFF
MINUTE_TIMESTP (0 to 59)
-
-
6
T
-
SECOND_TIMESTP (0 to 59)
-
-
All information provided in this document is subject to legal disclaimers.
AMPM
DAYS (1 to 31)
AMPM
DAY_ALARM (1 to 31)
TI_TP
-
DAY_TIMESTP (1 to 31)
5
STOP
TSF2
HOURS (0 to 23) in 24 h mode
-
-
HOUR_ALARM (0 to 23) in 24 h mode
-
-
AMPM
HOUR_TIMESTP (0 to 23) in 24 h mode
-
-
Rev. 02 — 7 May 2010
HOURS (1 to 12) in 12 h mode
HOUR_ALARM (1 to 12) in 12 h mode
-
1_O_16_TIMESTP[4:0]
4
TSF1
AF
BTSE
-
MONTHS (1 to 12)
-
-
HOUR_TIMESTP (1 to 12) in 12 h mode
MONTH_TIMESTP (1 to 12)
-
-
3
POR_
OVRD
T
BF
-
-
-
AO[3:0]
Integrated RTC, TCXO and quartz crystal
2
12_24
TSIE
BLF
WEEKDAYS (0 to 6)
WEEKDAY_ALARM (0 to 6) 1 - - - - XXX
COF[2:0]
-
1
MI
AIE
BIE
TF[1:0]
PCF2129A
T
0
SI
BLIE
© NXP B.V. 2010. All rights reserved.
0000 0000
1XXX XXXX
Reset value
0000 0000
0000 0000
1XXX XXXX
- XXX XXXX
- - XX XXXX
- - XX XXXX
- - XX XXXX
- - - - - XXX
- - - X XXXX
XXXX XXXX
1XXX XXXX
1 - XX XXXX
1 - XX XXXX
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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