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AT24C04A-10PE-2.7 Datasheet(PDF) 10 Page - ATMEL Corporation |
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AT24C04A-10PE-2.7 Datasheet(HTML) 10 Page - ATMEL Corporation |
10 / 20 page 10 AT24C02A/04A/08A/16A 5083A–SEEPR–9/04 Figure 8. Byte Write PAGE WRITE: The 2K EEPROM is capable of an 8-byte page write, and the 4K, 8K, and 16K devices are capable of 16-byte page writes. A page write is initiated the same as a byte write, but the microcontroller does not send a stop condition after the first data word is clocked in. Instead, after the EEPROM acknowledges receipt of the first data word, the microcontroller can transmit up to seven (2K) or fifteen (4K, 8K, 16K) more data words. The EEPROM will respond with a “0” after each data word received. The microcontroller must terminate the page write sequence with a stop condition, as shown in Figure 9. Figure 9. Page Write The data word address lower three (2K) or four (4K, 8K, 16K) bits are internally incre- mented following the receipt of each data word. The higher data word address bits are not incremented, retaining the memory page row location. When the word address, internally generated, reaches the page boundary, the following byte is placed at the beginning of the same page. If more than eight (2K) or sixteen (4K, 8K, 16K) data words are transmitted to the EEPROM, the data word address will “roll over” and previous data will be overwritten. ACKNOWLEDGE POLLING: Once the internally-timed write cycle has started and the EEPROM inputs are disabled, acknowledge polling can be initiated. This involves send- ing a start condition followed by the device address word. The read/write bit is representative of the operation desired. Only if the internal write cycle has completed will the EEPROM respond with a “0” allowing the read or write sequence to continue. S T A R T M S B M S B L S B S T O P W R I T E SDA LINE DEVICE ADDRESS WORD ADDRESS DATA L S B A C K A C K A C K R / W S T A R T M S B S T O P W R I T E SDA LINE DEVICE ADDRESS WORD ADDRESS (n) DATA (n) DATA (n + 1) DATA (n + x) L S B A C K A C K A C K A C K A C K R / W |
Similar Part No. - AT24C04A-10PE-2.7 |
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