M24C08-125 datasheet(18/30 Pages) STMICROELECTRONICS

18 / 30 page

Device operation

M24C16-125 M24C08-125 M24C04-125 M24C02-125

18/30

Doc ID 022564 Rev 1

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 Read/Write bit (RW) 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 9, without acknowledging the byte.

3.7.3

Sequential Read

This operation can be used after a Current Address Read or a Random Address Read. The

bus master does acknowledge the data byte output, and sends additional clock pulses so

that the device continues to output the next byte in sequence. To terminate the stream of

bytes, the bus master must not acknowledge the last byte, and must generate a Stop

condition, as shown in Figure 9.

The output data comes from consecutive addresses, with the internal address counter

automatically incremented after each byte output. After the last memory address, the

address counter ‘rolls-over’, and the device continues to output data from memory address

00h.

3.7.4

Acknowledge in Read mode

For all Read commands, the device waits, after each byte read, for an acknowledgment

during the 9th bit time. If the bus master does not drive Serial Data (SDA) Low during this

time, the device terminates the data transfer and switches to its Standby mode.

M24C08-125 Fiches technique(PDF) 18 Page - STMicroelectronics