參數資料
型號: 24LCS52TISTG
廠商: Microchip Technology Inc.
元件分類: EEPROM
英文描述: 2K 2.2V I2C Serial EEPROM with Software Write-Protect
中文描述: 2K 2.2伏的I2C串行EEPROM與軟件寫保護
文件頁數: 8/22頁
文件大?。?/td> 254K
代理商: 24LCS52TISTG
24AA024/24LC024/24AA025/24LC025
DS21210G-page 8
2004 Microchip Technology Inc.
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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