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Forums > Digital IC > Floorplanning, Place and route

Subject: How can I cut a routing blockage in FE?
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eminemshow
Posts: 75
Online: User is Offline
6/06/2007 2:46 AM  
Dear ALL:

I want to cut a routing blockage in one floorplan to make routing guides. For example, I dont have M5 cell routing blockage in a LEF hard block, I add this routing blockage at the top level, I have to cut some notches according to the pin shapes (if pins are on M5), then router can make M5 connections to these pins without DRC. How can I cut these notches on the added M5 routing blockage, this is more like a polygon operation, do Encounter have such db commands? I dont want to modify the LEF file (to add the M5 obstruction).

Thanks in advance!
bougantp
Posts: 19
Online: User is Offline
6/06/2007 6:55 AM  
You can use another solution.
You can specify, attach to your block, a routing halo, like a placement blockage halo.
In the documentation it is specified that it prohib routing on top of the macro on the specified layer, but allow the router to connect macro pins on this layer (Straigth connection).
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Forums > Digital IC > Floorplanning, Place and route > How can I cut a routing blockage in FE?


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