Issue link: https://resources.pcb.cadence.com/i/1180070
Allegro Constraint Compiler: Workshop Learn more at Cadence Support Portal - https://support.cadence.com © 2019 Cadence Design Systems, Inc. All rights reserved w orldw ide. Page 22 Object Rule Table (Object Rules) The Object Rule Specification table can be used to assign rules to objects in the design. Rule assignment can also be accomplished by referencing Group or Kind along with Name and Type classification defined in an Object table or an existing Net or XNet in the design. The primary use for the Object Rule table is to define explicit Pin-to-Pin rules of a group of objects by specifying a From-To Component designation. Once these Pin Pairs are defined, a Rule Specification/Rule Set or an existing Constraint Set could be applied to the appropriate object level (Net Class, Net Group, etc.). This table shows the robustness of ACC with "One-to-many" constraint expansion that propagates rules down to the lowest level while generating all supporting objects. If Relative Propagation Delay rules are being defined, the compiler will automatically create the required Match Groups in support of the rules. In addition, part assignment can be driven by a Mapping table to create many Pin-Pair relationships with associated Match Groups. Note: Relative Propagation Delay rules are only supported when an explicit Pin Pair is specified in the table using From Comp / To Comp. Specifying Global or Local Scope or Longest Pin Pair, Longest Driver/Receiver, and All Drivers/All Receivers will be ignored.