[SI-LIST] Re: termination for routing 8 SDRAMs to single Processor

  • From: "Dimiter Popoff" <dp@xxxxxxxxxxx>
  • To: <aavinda12@xxxxxxxxx>, <si-list@xxxxxxxxxxxxx>
  • Date: Thu, 11 Aug 2005 03:59:51 +0300

I have rooted 8 x8 SDRAMs to an 8240 without any terminations and it worked
remarkably stable. However, I had 64 data bits rather than 32.
I had put 4 SDRAM chips on top and 4 on the bottom of the board, 
practically next to the CPU, no connectors between.

Dimiter

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Dimiter Popoff               Transgalactic Instruments

http://www.tgi-sci.com
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-------Original Message-------
> From: Aravnda G <aavinda12@xxxxxxxxx>
> Subject: [SI-LIST] termination for routing 8 SDRAMs to single Processor
> Sent: Aug 11 '05 03:29
> 
>  Hi All,
>  I am working with a micro-processor conneted to 8 SDRAM with 12 address 
> lines to all SDRAMs and 32 data lines each to two sets of four SDRAMs. I was 
> wondering if anyone has managed to route this sort of topology without using 
> terminations. If so please send information on topology used. The IO are 
> lvttl compatible at 3.3V. Any input on routing possibilities is welcome.
>  
>  Thanks & Regards,
>  Alex.
>  
>  ---------------------------------
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