FreeLists / si-list / [SI-LIST] Re: Will ODT on DDR2 work?

[Jory McKinley <jory_mckinley@xxxxxxxxx>]

Hello Ludvik,
In my experience it always a good idea to simulate this transfer but we have 
found that using Full ODT drivers on the Micron side tend to create some 
undesirable Signal Integrity issues at the Controller (in your case the 
Virtex-V).  In most cases a Half strength ODT driver will work however you will 
need to simulate this while checking for overshot and ringback at the Virtex-V. 
 Also make sure that you have adequate crosstalk rules in place.
-Jory
Ludvik Kindl <Ludvik@xxxxxxxxxx> wrote: Gentlemen,
 

 

I will be interfacing 244-pin Mini-DIMM - DDR2-667 from Micron to Xilinx's
Virtex-5 and I want to use ODT instead of discrete resistors. Do you know
about any potential problem I will be facing on Virtex-5 or Micron side?

 

 

Regards,

 

Ludvik J. Kindl, MSEE

 

BEKERA CONSULTING, Inc.

751 Laurel Street, #122

San Carlos, California 94070

Cell: 650-868-2675

www.bekera.com   

Ludvik@xxxxxxxxxx 

 

helping engineers resolve their signal integrity issues



 



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