M34E04B Datasheet, PDF (15/35 Pages) STMicroelectronics – 4-Kbit Serial Presence Detect EEPROM compatible

M34E04B
can be used by the bus master.
Device operation
3.7
3.7.1
3.7.2
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.
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.
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.
DocID028428 Rev 1
15/35
34