PCF2127AT/1,518 NXP Semiconductors, PCF2127AT/1,518 Datasheet - Page 33

• 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
8.10.2 Register Minute_alarm
8.10.3 Register Hour_alarm
8.10.4 Register Day_alarm
Table 30.
[1]
Table 31.
[1]
[2]
Table 32.
[1]
Bit
7
6 to 4 MINUTE_ALARM
3 to 0
Bit
7
6
12 hour mode
5
4
3 to 0
24 hour mode
5 to 4 HOUR_ALARM
3 to 0
Bit
7
6
5 to 4 DAY_ALARM
3 to 0
Default value.
Default value.
Hour mode is set by the bit 12_24 in register Control_1.
Default value.
Symbol
AE_M
Symbol
AE_H
-
AMPM
HOUR_ALARM
Symbol
AE_D
-
Minute_alarm - minute alarm register (address 0Bh) bit description
Hour_alarm - hour alarm register (address 0Ch) bit description
Day_alarm - day rearm register (address 0Dh) bit description
[2]
[2]
All information provided in this document is subject to legal disclaimers.
Rev. 02 — 7 May 2010
Value
0
1
0 to 5
0 to 9
Value
0
1
-
0
1
0 to 1
0 to 9
0 to 2
0 to 9
Value
0
1
-
0 to 3
0 to 9
[1]
[1]
[1]
Place value Description
-
-
ten’s place
unit place
Place value Description
-
-
-
-
-
ten’s place
unit place
ten’s place
unit place
Place value Description
-
-
-
ten’s place
unit place
Integrated RTC, TCXO and quartz crystal
minute alarm is enabled
minute alarm is disabled
minute alarm information coded in BCD
format
hour alarm is enabled
hour alarm is disabled
unused
indicates AM
indicates PM
hour alarm information coded in BCD
format when in 12 hour mode
hour alarm information coded in BCD
format when in 24 hour mode
day alarm is enabled
day alarm is disabled
unused
day alarm information coded in BCD
format
PCF2127A
© NXP B.V. 2010. All rights reserved.
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