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參數(shù)資料
| 型號(hào)： | 24CO25-ST |
| 廠商： | Microchip Technology Inc. |
| 英文描述： | 2K 2.5V I 2 C ⑩ Serial EEPROM |
| 中文描述： | 2K 2.5VI 2葷⑩串行EEPROM |
| 文件頁數(shù)： | 8/12頁 |
| 文件大?。?/td> | 163K |
| 代理商： | 24CO25-ST |
24LC024/24LC025
DS21210A-page 8
Preliminary
1997 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 com-
mand has been issued from the master, the device ini-
tiates the internally timed write cycle. ACK polling can
be initiated immediately. This involves the master send-
ing 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.
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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