IN24LC02B
Note:
The IN24LC02B does not generate any acknowledge bits if an internal programming cycle is in
progress
The device that acknowledges, has to pull down the SDA line during the acknowledge clock pulse
in such a way that the SDA line is stable LOW during the HIGH period of the acknowledge related
clock pulse. Of course, setup and hold times must be taken into account. A master must signal an
end of data to the slave by not generating an acknowledge bit on the last byte that has been clocked
out of the slave. In this case, the slave must leave the data line HIGH to enable the master to
generate the STOP condition.
Figure 4. Data Transfer Sequence on the serial bus
BUS CHARACTERISTICS
Slave Address
The IN24LC02B are software-compatible with devices such as 24C01A, 24C02A, 24LC01,
and 24LC02B. A single 24LC02B can be used in place of two 24LC01's,
for example, without any modifications to software.
The "chip select" portion of the control byte becomes a don't care.
After generating a START condition, the bus master transmits the slave address consisting
of a 4-bit device code (1010) for the IN24LC02B, followed by three don't care bits.
The eighth bit of slave address determines if the master device wants to read or write to
the IN24LC02B (see Figure 5).
The IN24LC0 monitors the bus for its corresponding slave address all the time.
It generates an acknowledge bit if the slave address was true and it is not in a programming
mode.
Operation
Read
Write
Control Code
1010
1010
Chip Select
XXX
XXX
R/W
1
0
5
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