PCA2129T/Q900/2,51 NXP Semiconductors, PCA2129T/Q900/2,51 Datasheet - Page 35

• Manufacturer Part Number: PCA2129T/Q900/2,51
• Description: Real Time Clock
• Manufacturer: NXP Semiconductors
• Series: PCA2129r

Specifications of PCA2129T/Q900/2,51

• Rohs: yes
• Function: Clock, Calendar, Alarm, Watchdog, Timestamp
• Rtc Bus Interface: I2C, SPI
• Date Format: Binary
• Time Format: Binary
• Supply Voltage - Max: 4.2 V
• Supply Voltage - Min: 1.8 V
• Maximum Operating Temperature: + 80 C
• Minimum Operating Temperature: - 30 C
• Mounting Style: SMD/SMT
• Package / Case: SOP-16
• Battery Backup Switching: Yes

NXP Semiconductors
PCA2129T
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 in register Control_3, see
Section
Table 38.
[1]
Table 39.
Table 40.
Bit
7
6
5
4 to 0 1_O_16_TIMESTP[4:0]
Bit
Bit
7
6 to 4 SECOND_TIMESTP 0 to 5
3 to 0
7
6 to 4 MINUTE_TIMESTP
3 to 0
•
•
The TSF1 and TSF2 flags can be cleared by command; clearing both flags will clear
the interrupt. Once TSF2 is cleared, it will only be set again when TS pin 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
-
8.11.4.
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
All information provided in this document is subject to legal disclaimers.
Rev. 3 — 24 January 2013
Accurate RTC with integrated quartz crystal for automotive
Value
-
0 to 9
Value
-
0 to 5
0 to 9
Value Description
0
1
0
1
-
[1]
[1]
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
unused
second timestamp information coded in
BCD format
unused
minute timestamp information coded in
BCD format
PCA2129T
© NXP B.V. 2013. All rights reserved.
35 of 72