PCF2129T View Datasheet(PDF) - NXP Semiconductors.
Part Name
Description
MFG CO.
'PCF2129T' PDF : 73 Pages View PDF
NXP Semiconductors
6. Block diagram
PCF2129T
Accurate RTC with integrated quartz crystal for industrial
CLKOUT
BBS
VDD
VBAT
VSS
SDA/CE
SDO
SDI
SCL
IFS
TS
OSCI
32.768 kHz
OSCO
TCXO
BATTERY BACK UP
SWITCH-OVER
CIRCUITRY
internal
power
supply
TEMP
OSCILLATOR
MONITOR
RESET
SPI-BUS
INTERFACE
SERIAL BUS
INTERFACE
SELECTOR
I2C-BUS
INTERFACE
PCF2129T
TEMP
TEMPERATURE
SENSOR
Fig 1. Block diagram of PCF2129T
INT
DIVIDER
AND
TIMER
1 Hz
LOGIC
CONTROL
ADDRESS
REGISTER
RPU
Control_1
00h
Control_2
01h
Control_3
02h
Seconds
03h
Minutes
04h
Hours
05h
Days
06h
Weekdays
07h
Months
08h
Years
09h
Second_alarm
0Ah
Minute_alarm
0Bh
Hour_alarm
0Ch
Day_alarm
0Dh
Weekday_alarm
0Eh
CLKOUT_ctl
0Fh
Watchdg_tim_ctl
10h
Watchdg_tim_val
11h
Timestp_ctl
12h
Sec_timestp
13h
Min_timestp
14h
Hour_timestp
15h
Day_timestp
16h
Mon_timestp
17h
Year_timestp
18h
Aging_offset
19h
Internal_reg
1Ah
Internal_reg
1Bh
013aaa566
PCF2129T
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 3 — 12 February 2013
© NXP B.V. 2013. All rights reserved.
3 of 73
Share Link: 
