PCF2127ATSLASH1 datasheet(8/80 Pages) NXP

8 / 80 page

PCF2127A_2

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Product data sheet

Rev. 02 — 7 May 2010

8 of 80

NXP Semiconductors

PCF2127A

Integrated RTC, TCXO and quartz crystal

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

RAM registers

1Ah

RAM_addr_MSB

-------RA8

- - - - - - - 0

1Bh

RAM_addr_LSB

RA[7:0]

0000 0000

1Ch

RAM_wrt_cmd

XXXXXXXX

XXXX XXXX

1Dh

RAM_rd_cmd

XXXXXXXX

XXXX XXXX

Table 4.

Bit positions labeled as - are not implemented and will return a 0 when read. Bit 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

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