Re: Bird 14 comments

> Hello Fellow IBISans --
>
> I've been following the comments going back and forth on Bird 14,
> and somthing Bob Ross said in this last reply struck me as fundemental
> to how we wish to 'grow' this specification. Bob's comment was:
>
> "....So if Cref is really useful then I would not object to having it in. At
> this time, however, I do not see Cref or any other proposed parameter as
> being required. Any parameter that is not required cannot be relied upon to
> exist by simulator vendors. So at worst the additional parameters may be
> for information only....."
>
>
> As I see it, bird 14 takes IBIS beyond simply providing basic
> information for signal integry analysis into providing 'data book'
> information; enough for full board timing simulation. If this type
> ^^^^^^
> of information is not *required* or directly used by the simulator to
> produce waveforms, then we have two distinct types of models -- one for
> signal integrey analysis and a more complex one that helps in full board
> timing simulations. Perhaps this is a good place to make the break between
> Level 1 models and Level 2 models. Comments, anyone?
>

This goes back to my suggestion few weeks ago. I suggested that it is natural
to have timing information under IBIS. Timing information can follow a
a format similar to the one proposed for package models.

- Kumar
Received on Thu May 12 09:46:36 1994