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Q: FPGA based DRAM memory controller ( Answered 4 out of 5 stars,   0 Comments )
Subject: FPGA based DRAM memory controller
Category: Science > Technology
Asked by: grr3-ga
List Price: $200.00
Posted: 28 Oct 2004 06:31 PDT
Expires: 27 Nov 2004 05:31 PST
Question ID: 421181
Looking for a proven DRAM memory controller design (Xilinx compilable
VHDL) that can be implmeneted in an FPGA (Xilinx Virtex II series). 
Working with 2 banks of 256 MB, DDR PC2700 memory.  Need to implement a
high speed FIFO (digital delay line) with the memory that has a 1 Giga
byte per second throughput rate and dynamically variable length. 
Digital delay should be adjustable from 0 to 256 msec.  Each byte is a
1 nsec sample from an Analog to Digital COnverter.  Have already
looked over code available from Xilinx, and other "free" sources. 
What companies or individuals may have or be able to provide a

Request for Question Clarification by jbf777-ga on 01 Nov 2004 11:11 PST
Would you accept information on companies that can provide a custom solution?


Clarification of Question by grr3-ga on 01 Nov 2004 12:32 PST
Would accept info on companies that can provide a custom solution,
provided they have demonstrated expertise in this area of FPGA design
with Xilinx Virtex II FPGAs.  By demonstrated expertise, I would
prefer to see working (compiled and physically verified) VHDL code for
a general purpose DRAM memory controller.
Subject: Re: FPGA based DRAM memory controller
Answered By: jbf777-ga on 04 Nov 2004 09:55 PST
Rated:4 out of 5 stars
Hello -

If you require any additional information, please don't hesitate to ask.

Xilinx has a number of "expert partners" that do design work in the
area you're seeking -- IP Cores (Intellectual Property Cores); I've
talked to several over the past few days; some are booked solid into
early next year.  I have found two verbally confirmed companies that
are able to start work fairly immediately, are highly experienced, and
can demonstrate their expertise as outlined.

Northwest Logic works with customers as small as individuals, on up to
multi-billion dollar corporations:

Brian Daellenbach
Northwest Logic
1100 NW Compton Drive
Suite 100
Beaverton, OR 97006
Office: 503-533-5800 x309
Mobile: 503-320-0451
Fax: 503-533-5900

Birger Engineering is another, smaller firm:

Erik Widding
Birger Engineering, Inc.
Colonial Theater Building
100 Boylston Street; Suite #1070
Boston, Massachusetts 02116-4685  
phone: 617.695.9233
fax: 617.695.9234

If this is not a time-sensitive request, there are two other companies
with confirmed expertise in this area:

Andraka (booked till Feb)
+1 401-884-7930 
202 Torrie Lane
North Kingstown, RI 02852-1688
Sapphire Computers (booked till March)
(937) 767-1062
Yellow Springs, OH

The remaining companies below, though uncomfirmed, also work in this capacity:

Gabriele Lazzari
Misarc s.r.l
Via della Tecnica 8/P
Agrate Brianza, Milano  I-20041
Fax: 39.039.654257

Max J. Allen
FPTeK, Inc.
10055 Byrne Ave. Suite 137
Cupertino, CA  95014
United States
Office: (408) 973-1581
Mobile: (408) 314-5433
Fax: 408-884-2477

Andrew M. Norton
Comm Logic Design, Inc.
400 Scotts Bluff Drive
Morgan Hill, CA  95037
United States
Office: (510) 482-1818
Mobile: Unknown
Fax: (408) 782-8060

Martyn J Riley
Managing Director and CEO
4i2i Communications Ltd.
Doig Scott Bldg., Craibstone Estate
Bucksburn, Aberdeen  AB21 9YA
Office: +44 (0) 1224 712844
Fax: +44 (0)1224 714413


The following two companies have confirmed experience with these types
of projects, but not specifically yours; however, they feel confident
they can create a solution for you given the specifications you
outline, barring any unforeseen obstacles:

Peter Connolly
Fidus Systems, Inc.
28 Townsend Drive
Ottawa, ON  K2J 2T6  Canada
Office: (613) 828-0063 x 372
Mobile: Unknown
Fax: (613) 828-3113

Phil Duff
Tel: +44 (0) 1799 533200
Fax: +44 (0) 1799 533201


I encourage you to visit this page to find additional Xilinx expert
partner companies:


Search strategy:
"IP core" OR "IP cores" xilinx
grr3-ga rated this answer:4 out of 5 stars
We were aware of the Alliance Core partnership, but hadn't tried to
contact them to see what they could really do.  Were kinda hoping we'd
find an existing solution or something so close we could easily modify
it.  But as we kind of expected it probably doesn't exist.

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