參數(shù)資料
型號: 24AA024_07
廠商: Microchip Technology Inc.
英文描述: 2K I2C⑩ Serial EEPROM
中文描述: ⑩2K的I2C串行EEPROM
文件頁數(shù): 9/26頁
文件大?。?/td> 306K
代理商: 24AA024_07
2007 Microchip Technology Inc.
DS21210K-page 9
24AA024/24LC024/24AA025/24LC025
7.0
ACKNOWLEDGE POLLING
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, with ACK
polling being 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.
FIGURE 7-1:
ACKNOWLEDGE POLLING
FLOW
Send
Write Command
Send Stop
Condition to
Initiate Write Cycle
Send Start
Send Control Byte
with R/W =
0
Did Device
Acknowledge
(ACK =
0
)
Next
Operation
No
Yes
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