Date: Sun Apr 27 2003 - 00:10:03 PDT
The following reply was made to PR errata/47; it has been noted by GNATS.
Subject: Re: errata/47: PROPOSAL - Wrong description of tri0/1 in 3.7.4 (fwd)
Date: Sun, 27 Apr 2003 10:07:31 +0300 (IDT)
Resend with correction.
I would like to add mutual cross-references between:
- sections 3.7.4 (this section) and 7.13.1 ("tri0 and tri1 net strengths")
- sections 3.7.2 ("Wired nets") and 7.10.4 ("Wired logic net types")
- sections 3.7.3 ("Trireg net") and 7.13.2 ("trireg strength")
On Thu, 24 Apr 2003, Shalom Bresticker wrote:
> In Section 3.7.4
> Replace the first three paragraphs with:
> "The tri0 and tri1 nets model nets with resistive pulldown
> and resistive pullup devices on them. A tri0 net is
> equivalent to a wire net with a continuous 0 value of pull
> strength driving it. A tri1 net is equivalent to a wire net
> with a continuous 1 value of pull strength driving it.
> When no driver drives a tri0 net, its value is 0 with
> strength pull. When no driver drives a tri1 net, its value
> is 1 with strength pull. When there are drivers on a tri0
> or tri1 net, the drivers combine with the strength pull
> value implicitly driven on the net to determine the net's
> value. See 7.9 for a discussion of logic strength modeling.
> Table 6 and Table 7 are truth tables for modeling multiple
> drivers of strength strong on tri0 and tri1 nets. The
> resulting value on the net has strength strong, unless both
> drivers are z, in which case the net has strength pull."
> (In the last paragraph, "strong" and "pull" should be bold.)
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