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

• Manufacturer Part Number: 24AA512-E/MF
• Manufacturer: MICROCHIP [Microchip Technology]

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 re-sent. 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.
© 2005 Microchip Technology Inc.
ACKNOWLEDGE POLLING
24AA512/24LC512/24FC512
FIGURE 7-1:
Send Control Byte
Initiate Write Cycle
Write Command
with R/W = 0
Condition to
Acknowledge
Send Stop
Send Start
Did Device
(ACK = 0)?
Operation
Send
Next
ACKNOWLEDGE POLLING
FLOW
Yes
DS21754G-page 11
No