5 replies to this topic

[65tux]

For a project we have going we are going to build a simple shield with an I2C F-RAM chip (either FM24CL64B for 8kbyte or FM24CL16B for 2kbyte). We will hopefully have these prototyped in the next couple weeks and do a production run by the end of July. Anybody interested? We're not looking to make a bunch of money on these, just hoping to sell some to help cover the board/assembly costs so they will not be very expensive - the chips go for <$3 so pretty easy to swallow. We could do bigger chips - they go up to 128kbyte but we don't need anything that big for what we are doing - we will probably do the first batch with the 8kbyte chips.

[Geancarlo2]

Might be easier and cheaper to use http://wvshare.com/p...-FRAM-Board.htm

[65tux]

Might, but really looking for a shield for mounting purposes.

[nakchak]

Why use FRAM instead of flash? Other than faster IO?

[65tux]

For us it is write cycles that pushed us to FRAM. We need to keep track of a pulse counter across power cycles so that meant constant writes to the flash - up to 50 writes/second so we were worried about the life expectancy of flash with such frequent writes. I forget the number but FRAM was at least a couple of orders of magnitude better.

[gartral]

Hey, what's the status of that ram shield? And also, I'm no EE, but.. in theory.. couldn't one use the SD-RAM off of an old PC RAM chip?