Jason Tuendemann wrote:
> I am looking at making a data logger which will require a lot of
> non-volitile RAM about 256-512 kbytes (8bit byte) and preferrably serial.
> Does any one have any suggestions?
> Atmel have a chip which is serial 4 megabit which has 2048 pages of 264
> bytes x 8 bits whick looks fine but because the pages are 264 bytes does
> that mean that I have to write to it page at a time. In the data sheet it
> decribes eraseing the page before writing to an address, so could I write 16
> bytes to a page of 264 without eraseing the whole page?
>
I believe that you have to erase the whole page.  To get the density
that flash offers (as opposed to EEPROM), you lose some functionality.
Atmel also makes an 8Mbit part - AT45D081, although I don't know what
the availability is.  These look like great devices, but unfortunately
(for me) they don't come in mil-spec.

--Matt