Re: confusion rules for tran delays

From: Shalom Bresticker (Shalom.Bresticker@motorola.com)
Date: Thu May 23 2002 - 02:46:06 PDT

Paul,

You're right.

I have not checked in a simulation, but I interpret the LRM as follows:

tran and rtran have no delays.

Turn-on and turn-off delays may be specified for the tranifs.
If so, they specify delays for transitions to x and z as well.

However, after turn-on, transitions have no delay, unless to x or z.

Shalom

Paul Graham wrote:

> Section 7.6 of the 2001 LRM states:
>
> 7.6 Bidirectional pass switches
>
> The bidirectional pass switches shall not delay signals propagating
> through them. ...
>
> The delay specifications for tranif1, tranif0, rtranif1, and rtranif0
> devices shall be zero, one, or two delays. ...
>
> First it says that there is no delay. Then the next paragraph goes into a
> discussion of delays. How can the switches not delay signals if delays are
> specified? 

--
Shalom Bresticker                           Shalom.Bresticker@motorola.com
Design & Reuse Methodology                             Tel: +972 9 9522268
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