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Politics : Formerly About Advanced Micro Devices -- Ignore unavailable to you. Want to Upgrade?

To: Tony Viola who wrote (72621)	9/20/1999 11:30:00 PM
From: steve harris	Respond to of 1573439

Tony, best laugh I had all day! I was just sitting here thinking, "are they switching hot, or are they switching ground?" That is a sign of how old I am. steve

To: Tony Viola who wrote (72621)	9/20/1999 11:33:00 PM
From: Elmer	Respond to of 1573439

Re: "The frequency of a signal is defined as the reciprocal of the time between successive edges of the same kind (both rising or both falling), not the reciprocal of time between the absolute successive edges" You only define it this way because normally only edges of the same kind are valid. You should be defining it as valid edge to valid edge. With Rambus that makes it EITHER edge. So Rambus would transfer data at 800MHz. Drop this clock centric view. EP

To: Tony Viola who wrote (72621)	9/21/1999 12:01:00 AM
From: kash johal	Read Replies (1) \| Respond to of 1573439

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