FreeLists / si-list / [SI-LIST] Re: DDR SDRAM signal routing

["Klim" <klim@xxxxxxxxxxxxxxx>]

Ray Anderson,
    Can you tell what kind tool can simulate DDR SDRAM termination resister 
on PCB?

Best,
    Klim


----- Original Message ----- 
From: "Ray Anderson" <reanderson@xxxxxxxxxxxxx>
To: <si-list@xxxxxxxxxxxxx>
Sent: Monday, November 08, 2004 11:28 PM
Subject: [SI-LIST] Re: DDR SDRAM signal routing


> Ray Anderson wrote:
>
> You mentioned that you don't have the "possibility to run simulations".
> I would submit that it is almost mandatory to simulate complex,
> high-speed interfaces prior to committing a design to fab if you don't
> want to go thru multiple iterations of the board prior to finding a
> topology that works well (if at all). The cost of simulating (and there
> are some low or no cost solutions) is much less than the costs you'll
> incur with the 'cut and try' approach.
>
> App-notes and rules of thumb will only get you pointed in the right
> direction, but I feel simulation is the real key to understanding what
> is happening in any particular design (assuming the design is modeled
> correctly).
>
> -Ray Anderson
>
> Senior Signal Integrity Staff Engineer
> Xilinx Inc.
>
> ------------------------------------------------------------------
> To unsubscribe from si-list:
> si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field
>
> or to administer your membership from a web page, go to:
> http://www.freelists.org/webpage/si-list
>
> For help:
> si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field
>
> List FAQ wiki page is located at:
>                http://si-list.org/wiki/wiki.pl?Si-List_FAQ
>
> List technical documents are available at:
>                http://www.si-list.org
>
> List archives are viewable at:
> http://www.freelists.org/archives/si-list
> or at our remote archives:
> http://groups.yahoo.com/group/si-list/messages
> Old (prior to June 6, 2001) list archives are viewable at:
>  http://www.qsl.net/wb6tpu
>
> 

------------------------------------------------------------------
To unsubscribe from si-list:
si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field

or to administer your membership from a web page, go to:
http://www.freelists.org/webpage/si-list

For help:
si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field

List FAQ wiki page is located at:
                http://si-list.org/wiki/wiki.pl?Si-List_FAQ

List technical documents are available at:
                http://www.si-list.org

List archives are viewable at:     
                http://www.freelists.org/archives/si-list
or at our remote archives:
                http://groups.yahoo.com/group/si-list/messages
Old (prior to June 6, 2001) list archives are viewable at:
                http://www.qsl.net/wb6tpu