All,
I updated the other notes section to explain in detail, how to use the
voltage at the [Pin Reference] terminal to adjust the voltage at the I/O
pad, and the Reference_supply terminal in the [Receiver Thresholds]
section. I suggest that someone could add additional notes to deal with
the ISSO section.
Walter
From: Walter Katz [mailto:wkatz@xxxxxxxxxx] ;
Sent: Saturday, April 23, 2016 10:48 AM
To: IBIS-ATM <ibis-macro@xxxxxxxxxxxxx>; 'IBIS-Interconnect'
<ibis-interconn@xxxxxxxxxxxxx>; 'ibis-editorial@xxxxxxxxxxxxx'
<ibis-editorial@xxxxxxxxxxxxx>
Subject: All [Pin Reference] BIRD
All,
The IBIS-ATM, Interconnect and Editorial committees have identified
multiple issues relating to what "voltages" in the specification are
referenced to. I am proposing the enclosed BIRD which suggests adding a
new [Pin Reference] section that defines a signal_name that the EDA tool
can use as a reference node for simulations where the voltages (relative
to the simulator reference node) applied to a model rail terminals is not
the same as the voltages applied to the rail terminals use to generate the
IBIS data. If this BIRD is approved, then the work of the Editorial and
Interconnect committees can go forward.
Since the issues that get resolved if this BIRD is approved are holding
back discussions on C_comp, interconnect and editorial in every one of our
three weekly meetings, I suggest that this BIRD be the highest priority in
IBIS-ATM. While it may take a longish amount of time to get the editorial
details resolved, I would hope that IBIS-ATM can quickly vote to recommend
the approval of this BIRD in principle so that Interconnect and Editorial
can move forward with this assumption that the BIRD will formally be
approved.
There is only one sticky issue, and that is on IBIS files at the current
(or prior) IBIS Revision, or on IBIS files with future revisions that
include [Pin Reference] in the specification but do not have a [Pin
Reference] section:
Should we "recommend (suggest)" or "specify (shall)" that the EDA tool use
the reference node of I/O terminal simulation values be the rail terminal
whose [*** Reference] is 0.0V.
Walter
Walter Katz
<mailto:wkatz@xxxxxxxxxx> wkatz@xxxxxxxxxx
Phone 303.449-2308
Mobile 303.335-6156
Attachment:
Pin_Reference.docx
Description: application/vnd.openxmlformats-officedocument.wordprocessingml.document
