Actually, Si_location and Timing_location go back to 1997 and were introduced by Bob Ross of Interconnectix (pre-Mentor) http://www.eda.org/ibis/birds/bird43.txt Timing_location may also need to be changed to die for large FPGA type devices, because of large non-monotonic signals at the pins. On Tue, Aug 27, 2013 at 1:30 PM, Robert Haller <rhaller@enterasys.com>wrote: > I think the SiSoft guys probably pushed for this a while ago. Their > software can do chip to chip timing either at pin or pad (on either end of > transmission line). Usually one performs static timing from pin to pin > because then there is no double counting when using data sheet timing > specs. But if you are designing the silicon and the package, there are > good reasons to perform timing pad to pad when you are trying to shave > picoseconds. > Regards > Bob > > -----Original Message----- > From: owner-ibis@eda.org [mailto:owner-ibis@eda.org] On Behalf Of Aubrey > Sparkman > Sent: Monday, August 26, 2013 2:19 PM > To: Muranyi, Arpad > Cc: IBIS; IBIS-users > Subject: Re: [IBIS] SI_location / Timing_Location > > I have used these switches, though I'm not sure I gave them different > values. > > Possible scenario... Interface specs timing at pin, but I want to make > sure edges are monotonic at the silicon. > > Just a though. > > Aubrey Sparkman > > Sent from my iPhone > > On Aug 26, 2013, at 11:44 AM, "Muranyi, Arpad" <Arpad_Muranyi@mentor.com> > wrote: > > > Hello IBIS experts, > > > > Someone asked me the question whether Si_location and Timing_Location > > can have two different values because they have an IBIS file which > > does that. > > > > In attempt to answer their question, I searched the IBIS specification > > for Si_location and only found this sentence on pg. 16 (in v5.1): > > > > "Si_location and Timing_location are optional and specify where the > Signal Integrity and Timing measurements are made for the component. > Allowed values for either subparameter are "Die" or "Pin". The default > location is at the "Pin"." > > > > I found no other occurrences of "Si_location" or "Timing_location" > > in the entire specification, i.e. their meaning, usage and purpose are > > not defined. Or am I missing something? > > > > Going back to the original question, does it make sense to have two > > different values for these two parameters? > > > > Thanks, > > > > Arpad > > ===================================================================== > > > > > > > > -- > > This message has been scanned for viruses and dangerous content by > > MailScanner, and is believed to be clean. > > > > > > -------------------------------------------------------------------- > > |For help or to subscribe/unsubscribe, e-mail mikelabonte@eda-stds.org > > |or ibis-request@eda-stds.org > > | > > |IBIS reflector archives exist under: > > | > > | http://www.eda-stds.org/ibis/email_archive/ Recent > > | http://www.eda-stds.org/ibis/users_archive/ Recent > > | http://www.eda-stds.org/ibis/email/ E-mail since 1993 > > > > -- > This message has been scanned for viruses and dangerous content by > MailScanner, and is believed to be clean. > > > -------------------------------------------------------------------- > |For help or to subscribe/unsubscribe, e-mail mikelabonte@eda-stds.org > |or ibis-request@eda-stds.org > | > |IBIS reflector archives exist under: > | > | http://www.eda-stds.org/ibis/email_archive/ Recent > | http://www.eda-stds.org/ibis/users_archive/ Recent > | http://www.eda-stds.org/ibis/email/ E-mail since 1993 > > -- > This message has been scanned for viruses and > dangerous content by MailScanner, and is > believed to be clean. > > -------------------------------------------------------------------- > |For help or to subscribe/unsubscribe, e-mail mikelabonte@eda-stds.org > |or ibis-request@eda-stds.org > | > |IBIS reflector archives exist under: > | > | http://www.eda-stds.org/ibis/email_archive/ Recent > | http://www.eda-stds.org/ibis/users_archive/ Recent > | http://www.eda-stds.org/ibis/email/ E-mail since 1993 > -- Scott McMorrow Teraspeed Consulting Group LLC 16 Stormy Brook Rd Falmouth, ME 04105 (401) 284-1827 Business http://www.teraspeed.com Teraspeed® is the registered service mark of Teraspeed Consulting Group LLC -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. -------------------------------------------------------------------- |For help or to subscribe/unsubscribe, e-mail mikelabonte@eda-stds.org |or ibis-request@eda-stds.org | |IBIS reflector archives exist under: | | http://www.eda-stds.org/ibis/email_archive/ Recent | http://www.eda-stds.org/ibis/users_archive/ Recent | http://www.eda-stds.org/ibis/email/ E-mail since 1993Received on Tue Aug 27 10:39:34 2013
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