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

To: Time Traveler who wrote (33415)	6/19/1998 12:41:00 PM
From: Ali Chen	Read Replies (1) \| Respond to of 1572158

John Wang <They just have to cross-reference the parts from that reference design> John, you were and remain the least technically literate Intelafon on this thread. If you are projecting your experience form power supply design to a 100MHz PC board design, you are way wrong. To get a production quality board from a reference design you must retrace at least some parts of the layout to match your typical components. Your raw materials (quality of plastic, coatings, copper thickness) are probably slightly different. Your drawing tools and masks are different also. Your connectors from your stable supplier probably have slightly different impedance. The list goes on and on, and all things usually add up to deviation in transmission characteristics and clock skews. Unless the board OEM are employing the famous Intel's "exact copy" technology, this is a major effort and expence for them. The reference design is usually useful to avoid logical mistakes because many chip features are undocumented or poorly documented. You look much better when you keep quiet. Thanks.