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1、n Reason for not to use “Constraint Manager Enabled Flow” and When “Constraint Manager Enabled Flow” is started ?n Compare “Traditional Flow” with “Constraint Manager Enabled Flow”n How to change “Constraint Manager Enabled Flow” back to Traditional Flow ? And important Note.Content :1Reason: n If y
2、ou use “Constraint Manager Enabled Flow” in Concept-HDL, it will make Allegro constraint data empty or error.When “Constraint Manager Enabled Flow” is started ? 1. Dont press “ToolConstraintsEdit or Update Schematic“ Function in Concept-HDL. It will lead to “Constraint Manager Enabled Flow” started.
3、22. Dont select “Extract Constraints” when you import Physical data (Backannotate from layout) in Concept-HDL. It will also lead to “Constraint Manager Enabled Flow” started.Dont select this item3If you have Started “Constraints Manager Enable Flow”, the following actions happened. 1. “constraints”
4、directory will be created under project_directoryworklibdesign_directory, as shown 1. 2. UI of “Export Physical” will be changed, as shown 2. 4Traditional Flow Constraint Manager Enabled FlowCompare “Traditional Flow” with “Constraint Manager Enabled Flow”Traditional FlowConstraint Flowpstchip.dat p
5、stxnet.datpstxprt.datpstcmbc.dat pstcmdb.datpstchip.dat pstxnet.dat pstxprt.datExport PhysicalOutput files:Output files:For Concept tool :5Compare “Traditional Flow” with “Constraint Manager Enabled Flow”n In “Import Logic” function can see the difference between Traditional and Constraint Flow.Cons
6、traint Manager Enabled FlowTraditional FlowFor Allegro tool :6n How to change “Constraint Manager Enabled Flow” back to Traditional Flow ?Solution : Delete “constraints” ,”packaged” and “physical” directory.Delete thempstcmbc.dat pstcmdb.datpstchip.dat pstxnet.dat pstxprt.datn Very important Note:If layout board has ever been imported files of “constraint manager Enabled Flow” like below, brd file will keep it as a “constraint manager Enabled Flow”. So at that time. Your design also need to keep the same flow too, Because Allegro tool will always request 5 files.Be Careful - 7
