pcf2127a NXP Semiconductors, pcf2127a Datasheet - Page 8

• Manufacturer Part Number: pcf2127a
• Description: Integrated Rtc, Tcxo And Quartz Crystal
• Manufacturer: NXP Semiconductors

NXP Semiconductors
Table 4.
Bit positions labelled 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.
PCF2127A_1
Product data sheet
Address Register name
RAM registers
1Ah
1Bh
1Ch
1Dh
RAM_addr_MSB -
RAM_addr_LSB
RAM_wrt_cmd
RAM_rd_cmd
Register overview
Bit
7
RA[7:0]
X
X
…continued
-
X
X
6
Rev. 01 — 21 January 2010
5
-
X
X
4
-
X
X
3
-
X
X
Integrated RTC, TCXO and quartz crystal
2
-
X
X
1
-
X
X
PCF2127A
0
RA8
X
X
© NXP B.V. 2010. All rights reserved.
0000 0000
Reset value
- - - - - - - 0
XXXX XXXX
XXXX XXXX
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