Syed, True, but the point here is that the value for Corner comes from the tool. The tool cannot give it an "NA", for example, because if the tool runs a simulation it has a value for the corner, otherwise it can't run the simulation. So we can't assign a default to corner, because the tool assigns its value, therefore it seems that there will never be a need for a default. This is kind of like wiring two outputs in parallel... Arpad ============================================================= From: Syed Huq (huqs) [mailto:huqs@xxxxxxxxx] Sent: Tuesday, March 29, 2011 2:37 PM To: Muranyi, Arpad; IBIS-ATM Subject: RE: [ibis-macro] Re: Format Corner - Interpretation? If Type Corner has Typ, Min and Max, I would think Typ would be the default the tools should pick. -Syed From: ibis-macro-bounce@xxxxxxxxxxxxx [mailto:ibis-macro-bounce@xxxxxxxxxxxxx] On Behalf Of Muranyi, Arpad Sent: Tuesday, March 29, 2011 11:52 AM To: IBIS-ATM Subject: [ibis-macro] Re: Format Corner - Interpretation? Walter, Another question: Does a parameter of Type Corner need Default? Or is it not needed, or even prohibited? When would a tool make use of a default value for them? The tool always knows what corner it simulates, right? Thanks, Arpad ======================================================== From: ibis-macro-bounce@xxxxxxxxxxxxx [mailto:ibis-macro-bounce@xxxxxxxxxxxxx] On Behalf Of Muranyi, Arpad Sent: Tuesday, March 29, 2011 1:39 PM To: IBIS-ATM Subject: [ibis-macro] Re: Format Corner - Interpretation? Walter, Thanks for the answer. However, I think that's not the end of the story yet... If the value of corner (and the rest of the predefined parameters) are set by the tool, the following statements don't make sense in BIRD 124: | "xyz" is a predefined AMI parameter of Type String and Usage Info (Usage Info) is information that goes from the .ami file to the tool. If these parameters come FROM the tool they can't be Info. Thanks, Arpad ============================================================ From: Walter Katz [mailto:wkatz@xxxxxxxxxx] Sent: Tuesday, March 29, 2011 1:22 PM To: Muranyi, Arpad; 'IBIS-ATM' Subject: RE: [ibis-macro] Format Corner - Interpretation? Arpad, Corner is determined by the EDA tool. Walter From: ibis-macro-bounce@xxxxxxxxxxxxx [mailto:ibis-macro-bounce@xxxxxxxxxxxxx] On Behalf Of Muranyi, Arpad Sent: Tuesday, March 29, 2011 2:15 PM To: IBIS-ATM Subject: [ibis-macro] Format Corner - Interpretation? Hello AMI experts, I stumbled on a question regarding how Format Corner supposed to be interpreted by an EDA tool. Pg. 140 of the IBIS specification say this: and pg. 141 has this: Then on pg. 146 I see this: and on pg. 147 I see this: In BIRD 124 I read the following: | "[Corner]" is a predefined AMI parameter of Type String and Usage Info that can | be used to create an input column in a dependency table. It has a List format with | the allowed values "Typ", "Slow" and "Fast". but I don't see any text in the Specification or the BIRD that explains how "Corner" is predefined and from where and how it gets it value. Could someone explain this to me please? It seems that this needs another clarification BIRD... Thanks, Arpad ===============================================================