Hi

Look around carefully.  Some serial eeprom will take care of the
"ringbuffer".  When you reach the end of memory it will start writing at
the beginning.  I don't have any details but I think the 24LCXX and the
rest of that family do it.  I have some 24C256 from Atmel and I think
they do it too.  Look around and I'm sure you'll find the answer.  If
you don't give me a shout and i will try to help.

Charles

<SNIP!>

with 256k memory.This EEPROM should function as a ringbuffer. The data
from the serial port will be stored and when the memory is full,
it should start overwrite the datas and so on. I will connect also a

<SNIP!>

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