PCF2129A datasheet(7/68 Pages) NXP

Part #	PCF2129A

Description	Integrated RTC, TCXO and quartz crystal

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Manufacturer	NXP [NXP Semiconductors]

Direct Link	http://www.nxp.com

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7 / 68 page

PCF2129A_1

Product data sheet

Rev. 01 — 13 January 2010

7 of 68

NXP Semiconductors

PCF2129A

Integrated RTC, TCXO and quartz crystal

CLKOUT control register

0Fh

CLKOUT_ctl

TCR[1:0]

---COF[2:0]

00 - - - 000

Watchdog registers

10h

Watchdg_tim_ctl

WD_CD T

TI_TP

-

TF[1:0]

000 - - - 11

11h

Watchdg_tim_val WATCHDG_TIM_VAL[7:0]

XXXX XXXX

Timestamp registers

12h

Timestp_ctl

TSM

TSOFF

-

1_O_16_TIMESTP[4:0]

00 - X XXXX

13h

Sec_timestp

-

SECOND_TIMESTP (0 to 59)

- XXX XXXX

14h

Min_timestp

-

MINUTE_TIMESTP (0 to 59)

- XXX XXXX

15h

Hour_timestp

-

AMPM

HOUR_TIMESTP (1 to 12) in 12 h mode

- - XX XXXX

HOUR_TIMESTP (0 to 23) in 24 h mode

- - XX XXXX

16h

Day_timestp

-

DAY_TIMESTP (1 to 31)

- - XX XXXX

17h

Mon_timestp

---MONTH_TIMESTP (1 to 12)

- - - X XXXX

18h

Year_timestp

YEAR_TIMESTP (0 to 99)

XXXX XXXX

Aging offset register

19h

Aging_offset

----AO[3:0]

- - - - 1000

Internal registers

1Ah

Internal_reg

--------- - - - - - - -

1Bh

Internal_reg

--------- - - - - - - -

Table 4.

Register overview …continued

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.

Address Register name

Bit

Reset value

7

6

5

4

3

2

1

0

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PCF2129A Datasheet(PDF) 7 Page - NXP Semiconductors

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