Datasheet

DocID18204 Rev 6 13/36
M24M02-DR Device operation
4.5 Device addressing
To start communication between the bus master and the slave device, the bus master must
initiate a Start condition. Following this, the bus master sends the device select code, shown
in Table 2 (on Serial Data (SDA), most significant bit first).
When the device select code is received, the device only responds if the Chip Enable
Address is the same as the value on the Chip Enable (E2) input.
The 8
th
bit is the Read/Write bit (RW). This bit is set to 1 for Read and 0 for Write operations.
If a match occurs on the device select code, the corresponding device gives an
a
cknowledgment on Serial Data (SDA) during the 9
th
bit time. If the device does not match
the device select code, it deselects itself from the bus, and goes into Standby mode.
Table 2. Device select code
Device type identifier
(1)
1. The most significant bit, b7, is sent first.
Chip
Enable
MSB address
bits
RW
Device select code
b7 b6 b5 b4 b3 b2 b1 b0
1010E2
(2)
2. E2 bit value is compared to the logic level applied on the input pin E2.
A17 A16 RW