M24M02-DR datasheet(13/38 Pages) STMICROELECTRONICS

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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 3 (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 8th 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

acknowledgment on Serial Data (SDA) during the 9th bit time. If the device does not match

the device select code, it deselects itself from the bus, and goes into Standby mode.

Table 3. Device select code

Device type identifier(1)

1. The most significant bit, b7, is sent first.

Chip

Enable

MSB address

bits

Device select code

when addressing

the memory array

E2(2)

2. E2 bit value is compared to the logic level applied on the input pin E2.

A17

A16

Device select code

when addressing

the Identification

page

E2(2)

M24M02-DR 데이터시트(PDF) 13 Page - STMicroelectronics