piclist 1998\11\13\041519a >
Thread: RAS/CAS on DRAM?
www.piclist.com/techref/mems.htm?key=dram
picon face BY : Peter L. Peres email (remove spam text)



On Wed, 11 Nov 1998, John Payson wrote:

> If more I/O is needed that what would remain after the DRAM
> was interfaced, then use of extra hardware or a PLD to aid in
> the DRAM interfacing might be warranted.  As for pricing, my
> impression of the PLD/FPGA situation is that going much beyond
> a 22V10 requires expensive development tools.  Is this no longer
> true?

The latest info is that most development tools have trial/demo versions
that will let you use a small subset of the parts from that manufacturer
for a limited amount of time at least. Registration is also not in the
'killing' class anymore, $500 will get you going pretty far. Entry level
packages are from $0 to $199 or so.

The most popular makes use a downloader cable that is simpler than the
simplest DIY PIC programmer.

I believe that there will be A LOT more FPGA use in amateur and startup
circles in the following year. This is not going to affect PICs imho
(PICs are very lean + mean for their price).

I have said before that I did an IDE disk interface with a PIC16C64 and I
believe that a SIMM can be driven in the same way. The only point is, that
most beginners jump into a design head on without computing anything. A
serial RAM or two and a small PIC may end up being cheaper than doing it
all from scratch with a SIMM and will beat the SIMM at power requirements,
data retention and more.

Peter

<Pine.LNX.3.95.981112202943.287K-100000@plp4.plp.home.org>

In reply to: <01BE0DA2.90344400@JOHN_WKST1>
See also: www.piclist.com/techref/mems.htm?key=dram
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