[ibis-macro] Re: Package and On-Die presentation September 24 IBIS-ATM meeting
- From: "Walter Katz" <wkatz@xxxxxxxxxx>
- To: <Arpad_Muranyi@xxxxxxxxxx>, "'IBIS-ATM'" <ibis-macro@xxxxxxxxxxxxx>
- Date: Thu, 26 Sep 2013 13:56:22 -0400 (EDT)
Arpad,
I think you are correct. So if we are not concerned about Victim/Aggressor
connections, and are not identifying terminals with Model_name but are
using Pin_name and Pad_name, then Signal_name would work to identify
connections. The only case where this does not work is for the IBIS files
for memory chips where the model writer used a single Single_name for all
of the pins in the data bus. The other case where this will not work is
when a Power or Ground is segmented in the package, or on the die. The
model maker may choose to have several Signal_names for this partitioning.
I think this can be handled in several different ways, so I do not think
it will be a problem.
Walter
From: ibis-macro-bounce@xxxxxxxxxxxxx
[mailto:ibis-macro-bounce@xxxxxxxxxxxxx] On Behalf Of Muranyi, Arpad
Sent: Wednesday, September 25, 2013 9:11 PM
To: 'IBIS-ATM'
Cc: 'Randy Wolff'
Subject: [ibis-macro] Re: Package and On-Die presentation September 24
IBIS-ATM meeting
Thanks, that makes sense. Just a question: Would the
signal name column in [Pin] not be a reliable way to do
this? In other words, if there is a non 1:1 connection
between pin and pad, could it be possible that one leg
would be called one signal name and another leg would
be called another signal name?
Thanks,
Arpad
=========================================================
From: Walter Katz [mailto:wkatz@xxxxxxxxxx]
Sent: Wednesday, September 25, 2013 6:42 PM
To: Muranyi, Arpad; 'IBIS-ATM'
Cc: 'Randy Wolff'
Subject: RE: [ibis-macro] Re: Package and On-Die presentation September 24
IBIS-ATM meeting
Arpad,
If there is a (1:1) correspondence between Pins and Die pads, and we are
qualifying the Terminal with Pin_Name and Pad_Name, then (Connection #) is
not necessary. However if there is no (1:1) correspondence of Pins and
Pads, we cannot rely on the Pin_Name == Pad_Name to identify that the Pin
and Pad are connected. I use (Connection #) , (Aggressor #) or (Victim #)
to identify Terminal that are connected when using Model_Name in Terminal
records. Two Terminals are "Connected" if there is a relatively low
impedance connection between the two Terminals at Nyquist. Normal this
would be a <~1 Ohm DC resistance between the two terminals, but this is
not the case when there is a blocking cap in the circuit.
Walter
From: ibis-macro-bounce@xxxxxxxxxxxxx
[mailto:ibis-macro-bounce@xxxxxxxxxxxxx] On Behalf Of Muranyi, Arpad
Sent: Wednesday, September 25, 2013 6:59 PM
To: IBIS-ATM
Cc: Randy Wolff
Subject: [ibis-macro] Re: Package and On-Die presentation September 24
IBIS-ATM meeting
Walter,
Could you please explain what "(Connection xxx)" does on slides 9-12?
Thanks,
Arpad
======================================================================
From: ibis-macro-bounce@xxxxxxxxxxxxx
[mailto:ibis-macro-bounce@xxxxxxxxxxxxx] On Behalf Of Walter Katz
Sent: Tuesday, September 24, 2013 3:10 PM
To: IBIS-ATM
Cc: Randy Wolff
Subject: [ibis-macro] Package and On-Die presentation September 24
IBIS-ATM meeting
All,
Package and On-Die presentation as modified during the September 24
IBIS-ATM meeting.
Walter
Walter Katz
wkatz@xxxxxxxxxx
Phone 303.449-2308
Mobile 303.335-6156
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