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
8.12.3.3 Register Min_timestp
Table 71. Min_timestp - minute timestamp register (address 14h) 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
-
MINUTE_TIMESTP (0 to 59)
Reset
value
-
X
X
X
X
X
X
X
Table 72. Min_timestp - minute timestamp register (address 14h) 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
MINUTE_TIMESTP
0 to 5
ten’s place minute timestamp information coded in BCD format
3 to 0
0 to 9
unit place
8.12.3.4 Register Hour_timestp
Table 73. Hour_timestp - hour timestamp register (address 15h) 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
-
-
AMPM
HOUR_TIMESTP (1 to 12) in 12-hour mode
HOUR_TIMESTP (0 to 23) in 24-hour mode
Reset
-
-
X
X
X
X
X
X
value
Table 74. Hour_timestp - hour timestamp register (address 15h) 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 to 6
-
-
-
unused
12-hour mode[1]
5
AMPM
0
-
indicates AM
1
-
indicates PM
4
3 to 0
HOUR_TIMESTP
0 to 1
0 to 9
ten’s place hour timestamp information coded in BCD format
unit place when in 12-hour mode
24-hour mode[1]
5 to 4
3 to 0
HOUR_TIMESTP
0 to 2
0 to 9
ten’s place hour timestamp information coded in BCD format
unit place when in 24-hour mode
[1] Hour mode is set by the bit 12_24 in register Control_1.
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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