PCF2129A datasheet(3/69 Pages) NXP

Part #	PCF2129A

Description	Integrated RTC, TCXO and quartz crystal

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Manufacturer	NXP [NXP Semiconductors]

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PCF2129A_2

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Product data sheet

Rev. 02 — 7 May 2010

3 of 69

NXP Semiconductors

PCF2129A

Integrated RTC, TCXO and quartz crystal

6.

Block diagram

Fig 1.

Block diagram of PCF2129A

001aaj703

TEMP

VDD

BBS

VBAT

VSS

internal

power

supply

CLKOUT

RPU

INT

OSCI

OSCO

TEMP

1 Hz

32.768 kHz

TCXO

BATTERY BACK UP

SWITCH-OVER

CIRCUITRY

OSCILLATOR

MONITOR

TEMPERATURE

SENSOR

RESET

LOGIC

CONTROL

DIVIDER

AND

TIMER

ADDRESS

REGISTER

Control_1

Control_2

Control_3

00h

01h

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

TS

PCF2129A

SCL

SDI

SDO

SERIAL BUS

INTERFACE

SELECTOR

SPI-BUS

INTERFACE

I2C-BUS

INTERFACE

SDA/CE

IFS

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