[SI-LIST] Re: DDR1 without VTT termination

Kathir

Unfortunately, there are no easy ways out.  It is impossible to know 
what will work without simulation or previous experience with that 
particular processor and the memory device.  The size of the processor 
package can make or break the design.

Scott



Scott McMorrow
Teraspeed Consulting Group LLC
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Kathiresan K wrote:
> Hi,
> I need to have a single chip DDR1 (160 MHz, 16-Bit) memory for a processor.
> I don't want to provide VTT terminations. I'll keep the trace length as
> minimum as possible. I may provide series termination but I haven't done
> pre-layout simulation yet.
> Can somebody please clarify whether it can be designed without VTT
> termination? If yes, what can be the maximum trace length I go for? If I'm
> providing series termination, should I provide at both the ends for
> bi-directional signals?
>
> Regards,
> Kathir
>
>
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