Date: Thu Apr 24 2003 - 02:46:29 PDT
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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