Subject: RE: [IBIS-Users] Diff Pin Question
From: erik.van.der.ven@philips.com
Date: Mon Jul 21 2003 - 04:05:28 PDT
The delay time is not implemented in Hyperlynx. Does anyone know if this
feature is implemented in other IBIS simulators? Does anyone have an idea
to what extend the more "advanced" keywords are implemented well by
simulators (otherwise it is useless to make dedicated IBIS models).
With kind regards,
Ir. Erik van der Ven
Room DB1032
Business Line Networking Infrastructure
Philips Semiconductors BV
Gerstweg 2
6534 AE Nijmegen
The Netherlands
Phone: +31-24-3534334
"Muranyi, Arpad" <arpad.muranyi@intel.com>
Sent by:
owner-ibis-users@eda.org
07/20/03 01:22 AM
To: <ibis-users@eda.org>
cc: (bcc: Erik van der Ven/NYM/SC/PHILIPS)
Subject: RE: [IBIS-Users] Diff Pin Question
Classification:
Andis,
I don't remember seeing a response to your posting, so here is mine.
(Sorry for the delay).
You can use a negative number for the delay to describe that the
second pin (inverting output) is switching earlier than the first
pin (non-inverting output). If the delay value is positive, the
inverting output is switching later by that amount.
Arpad Muranyi
Intel Corporation
==================================================================
-----Original Message-----
From: Lauzums, Andris [mailto:ALAUZUMS@intersil.com]
Sent: Thursday, June 26, 2003 10:49 AM
To: ibis-users@eda.org
Subject: [IBIS-Users] Diff Pin Question
Hello-
I had a question about the [Diff_Pin] parameter in the IBIS
specification. In reference to t_delay, (min, typ, and max), where my
non-inverting ouput is output A, and my inverting output is B, I am
unclear about the following:
Does a positive (as opposed to negative) value in the t_delay column
mean that A occurs after B, or that B occurs after A? I have read the
IBIS specification for this parameter, and it states that "(t-delay
contains) launch delays of the non-inverting pins relative to the
inverting pins. The values can be of either polarity". It does not
seem to specify which way is positive, and which way is negative. This
is the source of my confusion.
Thank you for the help-
Andris Lauzums
Intersil Corporation
|------------------------------------------------------------------
|For help or to subscribe/unsubscribe, email majordomo@eda.org with just
|the appropriate command message(s) in the body:
|
| help
| subscribe ibis <optional e-mail address, if different>
| subscribe ibis-users <optional e-mail address, if different>
| unsubscribe ibis <optional e-mail address, if different>
| unsubscribe ibis-users <optional e-mail address, if different>
|
|or email a written request to ibis-request@eda.org.
|
|IBIS reflector archives exist under:
|
| http://www.eda.org/pub/ibis/email_archive/ Recent
| http://www.eda.org/pub/ibis/users_archive/ Recent
| http://www.eda.org/pub/ibis/email/ E-mail since 1993
|------------------------------------------------------------------
|For help or to subscribe/unsubscribe, email majordomo@eda.org
|with just the appropriate command message(s) in the body:
|
| help
| subscribe ibis <optional e-mail address, if different>
| subscribe ibis-users <optional e-mail address, if different>
| unsubscribe ibis <optional e-mail address, if different>
| unsubscribe ibis-users <optional e-mail address, if different>
|
|or email a written request to ibis-request@eda.org.
|
|IBIS reflector archives exist under:
|
| http://www.eda.org/pub/ibis/email_archive/ Recent
| http://www.eda.org/pub/ibis/users_archive/ Recent
| http://www.eda.org/pub/ibis/email/ E-mail since 1993
|------------------------------------------------------------------
|For help or to subscribe/unsubscribe, email majordomo@eda.org
|with just the appropriate command message(s) in the body:
|
| help
| subscribe ibis <optional e-mail address, if different>
| subscribe ibis-users <optional e-mail address, if different>
| unsubscribe ibis <optional e-mail address, if different>
| unsubscribe ibis-users <optional e-mail address, if different>
|
|or email a written request to ibis-request@eda.org.
|
|IBIS reflector archives exist under:
|
| http://www.eda.org/pub/ibis/email_archive/ Recent
| http://www.eda.org/pub/ibis/users_archive/ Recent
| http://www.eda.org/pub/ibis/email/ E-mail since 1993
This archive was generated by hypermail 2b28 : Mon Jul 21 2003 - 04:11:24 PDT