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Hierarchical floorplanner for gate array design layout

  • US 5,513,119 A
  • Filed: 06/21/1995
  • Issued: 04/30/1996
  • Est. Priority Date: 08/10/1993
  • Status: Expired due to Term
First Claim
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1. A placement system controlled by a user for hierarchically grouping a plurality of design elements into groups and selecting their positions on a design area, comprising:

  • means responsive to input information for creating a database defining said design elements and said design area,means responsive to said database for enabling said user to select positions of input/output terminals on said design area for connecting said design elements within said design area with circuitry outside said design area,means responsive to said database for determining, prior to the placement of the design elements, the size of regions on said design area to be occupied by said groups of design elements, based on the number of basic cells in each of the groups and the area of one of the basic cells,means responsive to the determined size of said regions and the selected positions of the input/output terminals for enabling said user to place said groups on said design area.

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