I am considering a data logging project that would sample a number of sensors
and record the data for later playback into a PC host for analysis. Minimally
it would need to record one or two hundred bytes per second for several
minutes, ideally quite a bit more. So something like 32K to 256K of memory
would need to be written and then later read back. There is almost no
requirement to randomly access this memory, just need to write it as data
comes in and read it for upload to the PC.

I know that I could build a data and address bus out of I/O pins, but that
seems like overkill and would probably use too many pins anyhow.

I have seen serial EEPROMS and they would almost be perfect except for the
slow programing and power consumption. Is there a serial SRAM available?
or a simple way to use commodity SRAM chips?

Any other thoughts?

-dg

David Gould           dg@illustra.com            510.869.6383 or 510.305.9468
Informix Software (formerly Illustra)  1111 Broadway #2000  Oakland, CA 94607
 - I realize now that irony has no place in business communications.