M34E04B datasheet(15/35 Pages) STMICROELECTRONICS

15 / 35 page

DocID028428 Rev 1

15/35

M34E04B

Device operation

can be used by the bus master.

3.7

Read operations

Read operations are performed independently of software protection has been set.

The device has an internal address counter which is incremented each time a byte is read.

3.7.1

Random address read

A dummy Write is first performed to load the address into this address counter (as shown in

Figure 7) but without sending a Stop condition. Then, the bus master sends another Start

condition, and repeats the device select code, with the RW bit set to 1. The device

acknowledges this, and outputs the contents of the addressed byte. The bus master must

not acknowledge the byte, and terminates the transfer with a Stop condition.

3.7.2

Current address read

For the Current address read operation, following a Start condition, the bus master only

sends a device select code with the RW bit set to 1. The device acknowledges this, and

outputs the byte addressed by the internal address counter. The counter is then

incremented. The bus master terminates the transfer with a Stop condition, as shown in

Figure 7, without acknowledging the byte.

M34E04B Datasheet(PDF) 15 Page - STMicroelectronics