Is this NVram a reasonable replacement for SD?

rwgast_logicdesign

So I was digging through my chips and found one of these chips, I forgot I had it. Its a maxim 1megabyte 70ns NVRam dip chip.

http://www.digikey.com/product-detail/en/DS1265AB-100%2B/DS1265AB-100%2B-ND/1768795

I was thinking I could use it as a fast storage medium, or even as ram for a multi-prop setup to share data. I have a ton of the 20mhz quad spi microchip srams around also, that could easily be turned to nvram by adding battery back up, the there is also quad spi flash! This maxim ram is parallel so it will take some kind of logic chips to even get it to a reasonable pin count,

Now obviously this chip is going to be a major PITA to get connected with a propeller, but s it worth it, I mean would it give better performance than other solutions. This chip is pretty pricey so it would be nice to find a use for it someday.

kwinn

Depends on your definition of reasonable and what you want to use it for. To drive it directly from the prop for maximum speed would take 31 I/O pins. With latches you could probably get reasonable speeds with only 12 pins. Using serial to parallel ('595) and parallel to serial ('165 or '597) would be so slow you might as well use quad spi ram.

Emulating older 8 bit CPU's or capturing small blocks of high speed data for the prop to analyze are about the only apps I can come up with.