PCF2127 View Datasheet(PDF) - NXP Semiconductors.
Part Name
Description
MFG CO.
'PCF2127' PDF : 101 Pages View PDF
NXP Semiconductors
PCF2127
Accurate RTC with integrated quartz crystal for industrial applications
8.12.3 Timestamp registers
8.12.3.1 Register Timestp_ctl
Table 67. Timestp_ctl - timestamp control register (address 12h) bit allocation
Bit positions labeled as - are not implemented and return 0 when read. Bits labeled as X are undefined at power-on and
unchanged by subsequent resets.
Bit
7
6
5
4
3
2
1
0
Symbol
TSM
TSOFF
-
1_O_16_TIMESTP[4:0]
Reset
value
0
0
-
X
X
X
X
X
Table 68. Timestp_ctl - timestamp control register (address 12h) bit description
Bit positions labeled as - are not implemented and return 0 when read. Bits labeled as X are undefined at power-on and
unchanged by subsequent resets.
Bit
Symbol
Value
Description
7
TSM
0
in subsequent events without clearing the timestamp
flags, the last event is stored
1
in subsequent events without clearing the timestamp
flags, the first event is stored
6
TSOFF
0
timestamp function active
1
timestamp function disabled
5
-
-
unused
4 to 0
1_O_16_TIMESTP[4:0]
1⁄16 second timestamp information coded in BCD
format
8.12.3.2 Register Sec_timestp
Table 69. Sec_timestp - second timestamp register (address 13h) bit allocation
Bit positions labeled as - are not implemented and return 0 when read. Bits labeled as X are undefined at power-on and
unchanged by subsequent resets.
Bit
7
6
5
4
3
2
1
0
Symbol
-
SECOND_TIMESTP (0 to 59)
Reset
value
-
X
X
X
X
X
X
X
Table 70. Sec_timestp - second timestamp register (address 13h) bit description
Bit positions labeled as - are not implemented and return 0 when read. Bits labeled as X are undefined at power-on and
unchanged by subsequent resets.
Bit
Symbol
Value
Place value Description
7
-
-
-
unused
6 to 4
SECOND_TIMESTP
0 to 5
ten’s place second timestamp information coded in BCD format
3 to 0
0 to 9
unit place
PCF2127
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 8 — 19 December 2014
© NXP Semiconductors N.V. 2014. All rights reserved.
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