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24AA1025 Datasheet(PDF) 11 Page - Microchip Technology |
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24AA1025 Datasheet(HTML) 11 Page - Microchip Technology |
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11 / 28 page  2005-2012 Microchip Technology Inc. DS21941K-page 11 24AA1025/24LC1025/24FC1025 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. 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 resent. 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 Note: Care must be taken when polling the 24XX1025. The control byte that was used to initiate the write needs to match the control byte used for polling. 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 |
Similar Part No. - 24AA1025 |
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Similar Description - 24AA1025 |
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