[ibis-interconn] Re: New keyword [Buffer Rail Mapping]
- From: "Bob Ross" <bob@xxxxxxxxxxxxxxxxx>
- To: "'Randy Wolff \(rrwolff\)'" <rrwolff@xxxxxxxxxx>, "'IBIS-Interconnect'" <ibis-interconn@xxxxxxxxxxxxx>
- Date: Wed, 8 Oct 2014 16:59:06 -0700
Walter:
I do not what changes Randy proposed but my responses are
below
The three/five/six rule makes it consistent with [Pin Mapping].
This allows for reduced number of columns (e.g., just
the pullup_ref and pulldown_ref) even for an Input device
or Terminator.
For PECL, the pullup_ref, pulldown_ref, and power_clamp_ref are
connected to Vdd, Only the gnd_clamp_ref is connected to Vss or (or gnd).
So the pulldown_ref and gnd_clamp_ref can be different.
I cannot think of an opposite situation, but for completeness
we need to support up to six columns.
Bob
From: ibis-interconn-bounce@xxxxxxxxxxxxx
[mailto:ibis-interconn-bounce@xxxxxxxxxxxxx] On Behalf Of Walter Katz
Sent: Wednesday, October 08, 2014 3:23 PM
To: Randy Wolff (rrwolff); IBIS-Interconnect
Subject: [ibis-interconn] Re: New keyword [Buffer Rail Mapping]
Randy,
I agree with the changes but why:
Each line must contain either three, five or six entries.
Three entries would be for pulldown_ref, pullup_ref.
Can one have a pulldown_ref and a gnd_clamp_ref and they be different?
Can one have a pullup_ref and a power_clamp_ref and they be different?
Why can we not simplify and have:
Sub-Params: power_ref, gnd_ref, ext_ref
Walter
From: Randy Wolff (rrwolff) [mailto:rrwolff@xxxxxxxxxx]
Sent: Wednesday, October 08, 2014 6:14 PM
To: Walter Katz; IBIS-Interconnect
Subject: RE: New keyword [Buffer Rail Mapping]
Walter,
I made some editorial changes. Let me know if these don't make sense to
you.
Thanks,
Randy
From: ibis-interconn-bounce@xxxxxxxxxxxxx
[mailto:ibis-interconn-bounce@xxxxxxxxxxxxx] On Behalf Of Walter Katz
Sent: Wednesday, October 08, 2014 2:25 PM
To: IBIS-Interconnect
Subject: [ibis-interconn] New keyword [Buffer Rail Mapping]
All,
This is a new [Buffer Rail Mapping] keyword section.
Walter
Walter Katz
wkatz@xxxxxxxxxx
Phone 303.449-2308
Mobile 303.335-6156
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