R1EX24032AxxS0A
Write Operations (WP =Low )
Byte Write: (Write operation during WP =Low 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 32kbit EEPROM receives 2 sequence 8-bit
memory address words. Upon receipt of this memory address, the EEPROM outputs acknowledgment "0"
and receives a following 8-bit write data. After receipt of write data, the EEPROM outputs
acknowledgment "0". If the EEPROM receives a stop condition, the EEPROM enters an internally-timed
write cycle and terminates receipt of SCL, SDA inputs until completion of the write cycle. The EEPROM
returns to a standby mode after completion of the write cycle.
Byte Write Operation
WP
Device
1st Memory
2nd Memory
32k
address
1010
W
address (n)
address (n)
Write data (n)
Start
ACK
R/W
ACK
ACK
ACK
Stop
Note: 1. Don't care bit
REJ03C0345-0101 Rev.1.01 Jan. 13, 2009
Page 12 of 22
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