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Subject: Re: Why does AMD 486DX2/4 want clock grounded at power-up?

Date: 11/07/00 at 8:39 PM
Posted by: John Dunn - Consultant
E-mail: ambertec@ieee.org
Message Posted:

In Reply to: Why does AMD 486DX2/4 want clock grounded at power-up? posted by Gerald Bremer on 10/20/00 at 8:24 AM:

Hello, Gerald.

I'd suggest that you take AMD's application note at face value. Their admonition to keep the CLK low until Vcc arrives at its "valid" value would not have been written if someone hadn't gotten into trouble by not observing that recommendation.

I recently had similar trouble with some VME chips made by Cypress in connection with "proper" application of Vcc. It would seem that explanations, prognostications and rationalizations of all kinds are possible in situations like that, but it's probably better to just do what AMD says!

Good luck.

John Dunn - President
Ambertec, Inc.

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