Article View: comp.arch
Article #3504Re: Dynamic internal state
From: Randell Jesup
Date: Sun, 18 Mar 1990 21:45
Date: Sun, 18 Mar 1990 21:45
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In article <36999@mips.mips.COM> mark@mips.COM (Mark G. Johnson) writes:
>In CMOS microprocessors, dynamic logic is used all over the place. That's
>one of the reasons why there is a datasheet spec for minimum clock frequency:
>to refresh these dynamic nodes. Generally, microprocessor circuits are
>designed to refresh dynamic nodes every cycle. A quick and incomplete
>peek at databooks reveals:
Not everyone goes dynamic. The RPM-40 was fully static, on purpose.
This makes debugging a processor easier, and makes certain things simpler.
It also makes the chip less susceptible to radiation-caused-upset, and
deterioration. (The RPM-40 was 1.25u CMOS).
--
Randell Jesup, Keeper of AmigaDos, Commodore Engineering.
{uunet|rutgers}!cbmvax!jesup, jesup@cbmvax.cbm.commodore.com BIX: rjesup
Common phrase heard at Amiga Devcon '89: "It's in there!"
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!rutgers!cbmvax!jesup From: jesup@cbmvax.commodore.com (Randell Jesup) Newsgroups: comp.arch Subject: Re: Dynamic internal state Message-ID: <10237@cbmvax.commodore.com> Date: 18 Mar 90 21:45:22 GMT References: <32937@shemp.CS.UCLA.EDU> <132903@sun.Eng.Sun.COM> <36999@mips.mips.COM> Reply-To: jesup@cbmvax (Randell Jesup) Organization: Commodore, West Chester, PA Lines: 16