Try FRAM from http://www.ramtron.com

Regards

Pailoor

Donald J. Bartley wrote:

> Hello everybody,
>
> I've been reading a few postings on your discussion group about serial
> SRAM and serial memory.  I ran into the same problem alittle while back
> where I needed to access memory using very few in/out pins of the
> controller.  Serial EEPROM wouldn't do because I was writing hundreds of
> pieces of data every few seconds and I knew the EEPROM would "die"
> within a week or so.  I did notice replies regarding the Ramtron FRAM
> but I would run into the same situation.  Granted it would last longer
> than an EEPROM but it would "die" eventually and I didn't want that in
> the back of my mind.  Besides, the write cycles were to long, some up
> into the millisecond range.  I did try the Solutions Cubed "RAMPack"
> which was mentioned in a few of the replies but again speed was the
> issue.  The module has the ability to do up to 19200 bps but they can't
> guarantee that speed because of the inaccuracy of the ceramic resonator
> they use for timing.  The fastest they could guarantee was 9600 bps.  I
> needed faster speeds.  So I developed my own module, it clocks up to 35
> Mbps with a write time of 70nS.  I realize most controllers don't clock
> that fast but I wanted a module that waited for the controller, not the
> other way around.  The module was designed so the least amount of
> program code would be needed to access it, nothing fancy just get in and
> get out.  Its all built around speed.  Check out its specifications at:
>
> http://members.home.net/djbcoffee/fastram.html
>
> Don

--
Website : http://business.vsnl.com/chiptech


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