R1EX24016AxxS0I

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.

REJ03C0360-0001 Rev.0.01 Dec. 28, 2007

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