PCF2127AT/1,518 NXP Semiconductors, PCF2127AT/1,518 Datasheet - Page 42

• Manufacturer Part Number: PCF2127AT/1,518
• Description: IC RTC/CALENDAR TCXO QTZ 20SOIC
• Manufacturer: NXP Semiconductors
• Type: Clock/Calendar/Alarmr

Specifications of PCF2127AT/1,518

• Package / Case: 20-SOIC (0.300", 7.50mm Width)
• Time Format: HH:MM:SS (12/24 hr)
• Memory Size: 512B
• Date Format: YY-MM-DD-dd
• Interface: I²C, 2-Wire Serial
• Voltage - Supply: 1.8 V ~ 4.2 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Function: Serial Clock, Timestamp, Timekeeper, Watchdog, Alarm, Calendar, Timer, Timer Interrupt
• Rtc Memory Size: 512 bytes
• Supply Voltage (max): 4.2 V
• Supply Voltage (min): 1.8 V
• Mounting Style: SMD/SMT
• Rtc Bus Interface: I2C
• Supply Current: 2600 nA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

NXP Semiconductors
PCF2127A_2
Product data sheet
8.12.3.1 Register Timestp_ctl
8.12.3.2 Register Sec_timestp
8.12.3.3 Register Min_timestp
8.12.2 Time stamp mode
8.12.3 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 45.
[1]
Table 46.
Table 47.
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 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
-
8.12.4.
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. 02 — 7 May 2010
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
Integrated RTC, TCXO and quartz crystal
unused
second timestamp information coded in
BCD format
unused
minute timestamp information coded in
BCD format
PCF2127A
© NXP B.V. 2010. All rights reserved.
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