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CAT24C128 データシート(PDF) 8 Page - Catalyst Semiconductor |
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CAT24C128 データシート(HTML) 8 Page - Catalyst Semiconductor |
8 / 18 page CAT24C128 8 Doc. No. MD-1103, Rev. J © Catalyst Semiconductor, Inc. Characteristics subject to change without notice READ OPERATIONS Immediate Read Upon receiving a Slave address with the R/W bit set to ‘1’, the CAT24C128 will interpret this as a request for data residing at the current byte address in memory. The CAT24C128 will acknowledge the Slave address, will immediately shift out the data residing at the current address, and will then wait for the Master to respond. If the Master does not acknowledge the data (NoACK) and then follows up with a STOP condition (Figure 9), the CAT24C128 returns to Standby mode. Selective Read To read data residing at a specific location, the internal address counter must first be initialized as described under Byte Write. If rather than following up the two address bytes with data, the Master instead follows up with an Immediate Read sequence, then the CAT24C128 will use the 14 active addres bits to initialize the inter- nal address counter and will shift out data residing at the corresponding location. If the Master does not ac- knowledge the data (NoACK) and then follows up with a STOP condition (Figure 10), the CAT24C128 returns to Standby mode. Sequential Read If during a Read session the Master acknowledges the 1st data byte, then the CAT24C128 will continue trans- mitting data residing at subsequent locations until the Master responds with a NoACK, followed by a STOP (Figure 11). In contrast to Page Write, during Sequential Read the address count will automatically increment to and then wrap-around at end of memory (rather than end of page). |
同様の部品番号 - CAT24C128 |
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同様の説明 - CAT24C128 |
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