24VL024/MNY MICROCHIP [Microchip Technology], 24VL024/MNY Datasheet - Page 10

• Manufacturer Part Number: 24VL024/MNY
• Manufacturer: MICROCHIP [Microchip Technology]

24VL024/24VL025
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 and 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, 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, the device will return
the ACK and the master can then proceed with the next
Read or Write command. See Figure 7-1 for a flow
diagram of this operation.
DS22130A-page 10
ACKNOWLEDGE POLLING
FIGURE 7-1:
Initiate Write Cycle
Send Control Byte
Write Command
with R/W = 0
Acknowledge
Condition to
Send Stop
(ACK = 0)?
Send Start
Did Device
Operation
Send
Next
ACKNOWLEDGE POLLING
FLOW
© 2009 Microchip Technology Inc.
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