PCF2129AT-1 datasheet(8/69 Pages) NXP

Part #	PCF2129AT-1

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

8 of 69

NXP Semiconductors

PCF2129A

Integrated RTC, TCXO and quartz crystal

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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