
R1EX24064AxxS0A
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 64kbit 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
WP
64k
Device
address
1010
W
1st Memory
address (n)
2nd Memory
address (n)
Write data (n)
No ACK
Start
ACK
R/W
ACK
ACK
Stop
Note: 1. Don't care bit
REJ03C0332-0200 Rev.2.00 Oct. 26, 2009
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