24AA04-I/SNG Microchip Technology, 24AA04-I/SNG Datasheet - Page 18

• Manufacturer Part Number: 24AA04-I/SNG
• Description: EEPROM Serial-I2C 4K-Bit 2Block x 256 x 8 1.8V/2.5V/3.3V/5V 8-Pin SOIC N Tube
• Manufacturer: Microchip Technology

Specifications of 24AA04-I/SNG

• Package: 8SOIC N
• Interface Type: Serial-I2C
• Density: 4 Kb
• Maximum Operating Frequency: 0.4 MHz
• Maximum Random Access Time: 900 ns
• Typical Operating Supply Voltage: 1.8|2.5|3.3|5 V
• Organization: 2Blockx256x8
• Data Retention: 200(Min) Year
• Operating Temperature: -40 to 85 °C

24AAXX/24LCXX/24FCXX
7.0
Since the device will not acknowledge commands
during a write cycle, this can be used to determine
when the cycle is complete (This feature can be used
to maximize bus throughput). Once the Stop condition
for a Write command has been issued from the master,
the device initiates the internally timed write cycle. ACK
polling can be initiated immediately. This involves the
master sending a Start condition, followed by the con-
trol byte for a Write command (R/W = 0). If the device
is still busy with the write cycle, then no ACK will be
returned. If no ACK is returned, the Start bit and control
byte must be re-sent. If the cycle is complete, then the
device will return the ACK and the master can then pro-
ceed with the next Read or Write command. See
Figure 7-1 for flow diagram.
DS21930C-page 18
ACKNOWLEDGE POLLING
FIGURE 7-1:
Initiate Write Cycle
Send Control Byte
Write Command
with R/W = 0
Condition to
Acknowledge
Send Stop
Send Start
Did Device
(ACK = 0)?
Operation
Send
Next
ACKNOWLEDGE
POLLING FLOW
© 2007 Microchip Technology Inc.
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