R1EX24016AxxS0A
Device Addressing
The EEPROM device requires an 8-bit device address word following a start condition to enable the chip
for a read or a write operation. The device address word consists of 4-bit device code, 3-bit device
address code and 1-bit read/write(R/W) code. The most significant 4-bit of the device address word are
used to distinguish device type and this EEPROM uses “1010” fixed code. The device address code is
followed by the 3-bit memory address in the order of a10, a9, a8.
The eighth bit of the device address word is the read/write(R/W) bit. A write operation is initiated if this
bit is low and a read operation is initiated if this bit is high.
The EEPROM turns to a stand-by state if the device code is not “1010” or device address code doesn’t
coincide with status of the correspond hard-wired device address pins A0 to A2.
Device Address Word
Device address word (8-bit)
Device code (fixed)
Device address code
R/W code * 1
16k
1
0
1
0
a10
a9
a8
R/W
Note:
1. R/W=“1” is read and R/W = “0” is write.
REJ03C0350-0101 Rev.1.01 Jan. 13, 2009
Page 11 of 22
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