From owner-cvs-all  Mon Nov  5 21: 6:57 2001
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To: Wilko Bulte <wkb@freebie.xs4all.nl>
Cc: John Baldwin <jhb@FreeBSD.ORG>, Chern Lee <chern@FreeBSD.ORG>,
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From: "Louis A. Mamakos" <louie@TransSys.COM>
Subject: Re: cvs commit: doc/en_US.ISO8859-1/articles/serial-uart article 
References: <200111051925.fA5JPqD87227@freefall.freebsd.org> <XFMail.011105114453.jhb@FreeBSD.org> <20011105213421.A67832@freebie.xs4all.nl> 
In-reply-to: Your message of "Mon, 05 Nov 2001 21:34:21 +0100."
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> On Mon, Nov 05, 2001 at 11:44:53AM -0800, John Baldwin wrote:
> > 
> > On 05-Nov-01 Chern Lee wrote:
> > > chern       2001/11/05 11:25:52 PST
> > > 
> > >   Modified files:
> > >     en_US.ISO8859-1/articles/serial-uart article.sgml 
> > >   Log:
> > >   Use "raising" and "lowering" the signal over "asserting" and
> > >   "disasserting" (not a word).
> > 
> > I think 'deasserting' may be a word, but raising/lowering is fine.
> 
> Assert / deassert are the terms generally used in chip datasheets.
> 

Assert/deassert tend to be preferable because the meaning of "assert"
is clear even if the signal is active-low, while raise and lower might
be ambiguous. This is also a problem when referring to RS-232 signals,
since the "assert" state of a control signal is the more negative
voltage, if I recall correctly.

(Either set is probably better than "mark" and "space" as ways
to refer to the states of the signals.)

louie


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