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Politics : Formerly About Advanced Micro Devices

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To: Tony Viola who wrote (72621)9/21/1999 12:01:00 AM
From: kash johal  Read Replies (1) of 1573570
 
Tony,

Re: "400 vs 800 Mhz"

I believe that Elmer is right (yuck it hurt to say it).

If you look at the data wafeform of the 400Mhz clock with data changing on both edges of the clock.

And you compare it with an 800 Mhz signal with the data on only ONE edge of the clock the DATA STREAM would be IDENTICAL.

So the design requirements for traces/noise/reflections/termination etc etc are THE SAME as for a 800Mhz data stream.

And the bottom line is that it is NON-TRIVIAL building these kind of systems - let alone in Intel kind of volumes.

Your whole point originally was that the design requirements were much less as the data was double-pumped at 400Mhz.

regards,

Kash Johal
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