Stats

  • Locked Locked
  • Replies 4
  • Subscribers 166
  • Views 13771
  • Members are here 0
More Content
This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

Moving DFA constrained parts

Pkeefie

  All,

We use to add a 15 mil overage to our Place_Bound for every footprint to acomadate our assembly vendors 30 mil min between components. All of our parts are now being created with a DFA shape that is the same size as the actual part. I then set the constraints to be 30 mil part to part and the place_bound is the same size as the DFA shape. Now when I move the parts after a quick_place I can't tell if I'm to close to a part till I move it a few times to see the DRC, then I have to move it away to clear the DRC.

  Am I missing something or do I have to move each part 3-5 times to get it in the right location without being to far way from another part. With my old Place_bound I could just butt them up against each other and see that they were not to far away from each other. Does anyone use this feature in Allegro? I can't go back to the "old" days and place using a .025 grid, parts will be to far apart.

 Thanks

paulk

Parents
  • mcatramb91

    Paul,

    If everything is setup correctly you should get real time feedback as you violate the DFA Clearance while the component is on your cursor.  By real time feedback I mean you would see a bubble appear between the DFA Boundaries and a slight pause in the component movement indicating a minimum clearance condition before placing the component.  You have to be in Place Manual to see this feedback and you do not get any feedback when using Edit > Move to move components.

    Hope this helps,
    Mike Catrambone

     

Reply
  • mcatramb91

    Paul,

    If everything is setup correctly you should get real time feedback as you violate the DFA Clearance while the component is on your cursor.  By real time feedback I mean you would see a bubble appear between the DFA Boundaries and a slight pause in the component movement indicating a minimum clearance condition before placing the component.  You have to be in Place Manual to see this feedback and you do not get any feedback when using Edit > Move to move components.

    Hope this helps,
    Mike Catrambone

     

Children
No Data
Cadence Guidelines

Community Guidelines

The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best practices to solve problems and get the most from Cadence technology. The community is open to everyone, and to provide the most value, we require participants to follow our Community Guidelines that facilitate a quality exchange of ideas and information. By accessing, contributing, using or downloading any materials from the site, you agree to be bound by the full Community Guidelines.