24AA512 MICROCHIP [Microchip Technology], 24AA512 Datasheet - Page 11

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24AA512

Manufacturer Part Number
24AA512
Description
512K I2C CMOS Serial EEPROM
Manufacturer
MICROCHIP [Microchip Technology]
Datasheet

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7.0
Since the device will not acknowledge 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 control 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, then the Start bit and control byte
must be resent. If the cycle is complete, then the device
will return the ACK and the master can then proceed
with the next Read or Write command. See Figure 7-1
for flow diagram.
 2004 Microchip Technology Inc.
ACKNOWLEDGE POLLING
24AA512/24LC512/24FC512
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
YES
DS21754E-page 11
NO

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