Hi all,I found that you can not use the Rel Prop delay property in Concept HDL schematic. I was only entering a Matched Length Group name as a value. Which it then created a ML group in Allro CM of that name, but would over write with default settings every time I packaged. I would have to incorporate a host of syntax / variables in the value field. Not intuitive at all! So, guess I am forced to create the ML group "Manually" in Allegro CM, then manually add all nets / xnets in that group. Also losing the added benefit to see the properties in the schematic.
This came straight from Cadence. Mark On 4/17/2011 4:28 AM, O Migs wrote:
Hi Mark,Just a thought. Do you have "Create user-defined properties" selected during the netin process? This option allows the creation of property definitions from the netlist.Best regards, -oscarOn Thu, Apr 14, 2011 at 3:46 AM, Mark Salberg <msalberg@xxxxxxxxxxxx <mailto:msalberg@xxxxxxxxxxxx>> wrote:Here is the same as original message WITH images. I was wondering if anyone there has run into this one? After adding Prop delay property on nets in schematic (Concept), package to Allegro, all nets are assigned to a Matched Length group in CM. Set target, add delta / tolerance and assign pin pairs as Longest Pin Pair. _Everything is fine until packaging schematic changes to Allegro next time!_ *After packaging*, the delta / tolerance is defaulted back to *0 mil:5%??? Thus causing all Prop delays to fail. * Any Ideas? I just finished a design using this method, but it never did this. P.S. I really like the idea of assigning in the schematic. Thanks in advance, Mark