why don't you integrate an sdram controller in the cpld?
the cpld is on the board anyway and you could use standard sdram modules
from a pc!
tino





Herbert Graf <mailinglist@FARCITE.NET>
Gesendet von: pic microcontroller discussion list <PICLIST@MITVMA.MIT.EDU>
16.11.2003 20:58
Bitte antworten an pic microcontroller discussion list


        An:     PICLIST@MITVMA.MIT.EDU
        Kopie:
        Thema:  Re: [PIC]: PIC Based Logic Analyzer


> > -----Original Message-----
> > From: "Jan-Erik Soderholm XA (TN/PAC)"
> <jan-erik.xa.soderholm@ERICSSON.COM>
>
> > Just a observation, the selected SRAM (Dallas DS1258Y)
> > is about $40.00 at Digikey. Min Qty = 9 and it's "Non-stock".
> >
> > A "normal" 256k*16 SRAM is about $8.00-9.00 and "In stock".
>
> The DS1258Y is NONVOLATILE SRAM.

        Very true, however, as I mention on my page, the non volatility is
not
required for the application at hand. It just was a part I had on hand. It
does make things hand such that the last capture is available on fresh
powerups, however if this feature isn't wanted (the client allows the
saving
of captured waveforms) using a "regular" SRAM is not a problem. In fact
the
SRAMs used on old 486 boards would probably work (although it would likely
be a multichip solution). TTYL

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