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R1EX24256BSAS0I Datasheet(PDF) 10 Page - Renesas Technology Corp |
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R1EX24256BSAS0I Datasheet(HTML) 10 Page - Renesas Technology Corp |
10 / 18 page R1EX24256BSAS0I/R1EX24256BTAS0I Write Operations(WP=High) Byte Write: (Write operation during WP=High status) A write operation requires an 8-bit device address word with R/W = “0”. Then the EEPROM sends acknowledgment "0" at the ninth clock cycle. After these, the 256kbit EEPROM receives 2 sequence 8-bit memory address words. Upon receipt of this memory address, the EEPROM outputs acknowledgment "0". After receipt of 8-bit write data, the EEPROM outputs acknowledgment "1"(NO ACK). Then the EEPROM write operations are not allowed. Byte Write Operation Device address 1st Memory address (n) 2nd Memory address (n) Write data (n) 256k 10 10 W Stop Start ACK ACK ACK R/W Note: 1. Don't care bit WP No ACK Note: 1. Don't care bit Device address 1st Memory address (n) 2nd Memory address (n) Write data (n+m) Write data (n) 256k 10 10 W Stop Start ACK ACK ACK R/W WP No ACK No ACK Page Write: The page write is the same sequence as the byte write. The page write is initiated by a start condition, device address word and memory address(n) with every ninth bit acknowledgment"0". But after inputting write data(Dn) , the EEPROM outputs acknowledgment "1"(NO ACK). Then the EEPROM write operations are not allowed. Page Write Operation R10DS0007EJ0100 Rev.1.00 Page 10 of 16 Aug. 04, 2010 |
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