PCF2129AT/2,518 NXP Semiconductors, PCF2129AT/2,518 Datasheet - Page 10

• Manufacturer Part Number: PCF2129AT/2,518
• Description: Real Time Clock
• Manufacturer: NXP Semiconductors
• Series: PCF2129r

Specifications of PCF2129AT/2,518

• 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: 1.2 V
• Maximum Operating Temperature: + 60 C
• Minimum Operating Temperature: - 15 C
• Mounting Style: SMD/SMT
• Package / Case: SOP-20
• Battery Backup Switching: Yes
• Factory Pack Quantity: 2000

NXP Semiconductors
PCF2129AT
Product data sheet
8.2.3 Register Control_3
Table 8.
[1]
[2]
Bit
7 to 5 PWRMNG[2:0]
4
3
2
1
0
Values see
Default value.
Symbol
BTSE
BF
BLF
BIE
BLIE
Control_3 - control and status register 3 (address 02h) bit description
Table
All information provided in this document is subject to legal disclaimers.
14.
Rev. 5 — 12 February 2013
Value
[1]
0
1
0
1
0
1
0
1
0
1
[2]
[2]
[2]
[2]
[2]
Description
control of the battery switch-over, battery low
detection, and extra power fail detection
functions
no timestamp when battery switch-over
occurs
time-stamped when battery switch-over
occurs
no battery switch-over interrupt generated
flag set when battery switch-over occurs;
battery status ok;
battery status low;
no interrupt generated from the battery
flag (BF)
interrupt generated when BF is set
no interrupt generated from battery low
flag (BLF)
interrupt generated when BLF is set
flag must be cleared to clear interrupt
no battery low interrupt generated
flag cannot be cleared by command
Integrated RTC, TCXO and quartz crystal
PCF2129AT
© NXP B.V. 2013. All rights reserved.
Reference
Section 8.5
Section 8.11.4
Section 8.5.1
Section 8.5.3
Section 8.12.6
Section 8.12.7
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