PCF2129AT NXP [NXP Semiconductors], PCF2129AT Datasheet - Page 34

• Manufacturer Part Number: PCF2129AT
• Description: Integrated RTC, TCXO and quartz crystal
• Manufacturer: NXP [NXP Semiconductors]

NXP Semiconductors
PCF2129A_1
Product data sheet
8.11.3.1 Register Timestp_ctl
8.11.3.2 Register Sec_timestp
8.11.3.3 Register Min_timestp
8.11.2 Timestamp mode
8.11.3 Timestamp registers
The timestamp function has two different modes selected by the control bit TSM
(timestamp mode) in register Timestp_ctl:
The timestamp function also depends on the control bit BTSE (battery switch timestamp
enable) in register Control_3, see
Table 37.
[1]
Table 38.
Table 39.
Bit
7
6
5
4 to 0 1_O_16_TIMESTP[4:0]
Bit
7
6 to 4 SECOND_TIMESTP 0 to 5
3 to 0
Bit
7
6 to 4 MINUTE_TIMESTP
3 to 0
•
•
The TSF1 and TSF2 flags can be cleared by using the interface; clearing both flags
will clear the interrupt. Once TSF2 is cleared it will only be set again when pin TS is
driven to ground once again.
If TSM is logic 0 (default): in subsequent trigger events without clearing the timestamp
flags, the last timestamp event is stored
If TSM is logic 1: in subsequent trigger events without clearing the timestamp flags,
the first timestamp event is stored
Default value.
Symbol
TSM
TSOFF
-
Symbol
-
Symbol
-
Timestp_ctl - timestamp control register (address 12h) bit description
Sec_timestp - second timestamp register (address 13h) bit description
Min_timestp - minute timestamp register (address 14h) bit description
Rev. 01 — 13 January 2010
Value
-
0 to 9
Value
-
0 to 9
0 to 5
Value Description
0
1
0
1
-
[1]
[1]
Section
in subsequent events without clearing the timestamp
flags, the last event is stored
in subsequent events without clearing the timestamp
flags, the first event is stored
timestamp function active
timestamp function disabled
unused
1
⁄
Place value Description
-
ten’s place
unit place
Place value Description
-
ten’s place
unit place
16
second timestamp information coded in BCD format
8.11.4.
Integrated RTC, TCXO and quartz crystal
unused
second timestamp information coded in
BCD format
unused
minute timestamp information coded in
BCD format
PCF2129A
© NXP B.V. 2010. All rights reserved.
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