PCF2127AT/1,518 NXP Semiconductors, PCF2127AT/1,518 Datasheet - Page 61

• 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
Fig 45. Bus protocol, reading from RAM
P/S
P/S
S
1
1
1
0
0
0
1
1
1
All information provided in this document is subject to legal disclaimers.
slave address
data byte 1Ah
slave address
slave address
last data byte
0
0
0
0
0
0
Rev. 02 — 7 May 2010
0
0
0
1
1
1
write bit
write bit
read bit
from PCF2127A
from PCF2127A
from PCF2127A
from PCF2127A
no acknowledge
acknowledge
acknowledge
acknowledge
acknowledge
0
0
1
A
A
A
A
A
P
Integrated RTC, TCXO and quartz crystal
register address 1Ah
register address 1Dh
data byte 1Bh
data byte
data bytes
0 to n
from PCF2127A
from PCF2127A
from PCF2127A
acknowledge
acknowledge
acknowledge
acknowledge
from master
PCF2127A
A
A
A
A
© NXP B.V. 2010. All rights reserved.
set RAM
address
RAM
read command
read data
from RAM
001aaj722
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