Contract methodology for concurrent hierarchical design
First Claim
1. A method for partitioning wiring connecting individual physical elements of a VLSI chip of a hierarchical design having multiple levels, comprising the steps of:
- defining a size for the chip of a hierarchical design, removing blocked areas, including clock and power grid areas, leaving the wiring channels available for interconnecting the individual elements of the VLSI chip, from said available area, allocating a percentage of wiring levels for global and local wiring as parallel iterations for the global and local wiring; and
as the parallel iterations for the global and local wiring progress, modifying the percentage to be allocated for global and local wiring, and during the parallel iterative process increasing the number of wires for the power grid area to prevent a signal wire from having an active wire on either side of the signal wire; and
defining a vertical slice of wiring resources used for the space above a macro entity, and checking the macro entity with the context of the VLSI chip physical design above it; and
implementating a blockage modeling tool to accurately wire DRC correct wiring designs using automatic routing tools and wherein said blockage modeling tool keeps any adjacent wire at a spacing value greater than a minimum spacing away from a wire when the width of a wire is greater than a rule defined width.
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Accused Products
Abstract
A method for partitioning wiring connecting individual physical elements of a VLSI chip of a hierarchical design having multiple levels, begins by defining a size for the chip of a hierarchical design, and then removing blocked areas, including clock and power grid areas leaving the wiring channels available for interconnecting the individual elements of the VLSI chip. A percentage of the available area is allocated for wiring levels for global and local wiring as parallel iterations for the global and local wiring proceed and modified as the parallel iterations for the global and local wiring progress. During the parallel iterative process the number of wires increases for the power grid area to prevent a signal wire from having an active wire on either side of the signal wire. In the interactive process, a vertical slice of wiring resources used for the space above a macro entity is defined and the macro entity is checked with the context of the VLSI chip physical design above it. The process employs a blockage modeling tool to accurately wire DRC correct wiring designs using automatic routing tools.
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Citations
2 Claims
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1. A method for partitioning wiring connecting individual physical elements of a VLSI chip of a hierarchical design having multiple levels, comprising the steps of:
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defining a size for the chip of a hierarchical design, removing blocked areas, including clock and power grid areas, leaving the wiring channels available for interconnecting the individual elements of the VLSI chip, from said available area, allocating a percentage of wiring levels for global and local wiring as parallel iterations for the global and local wiring; and
as the parallel iterations for the global and local wiring progress, modifying the percentage to be allocated for global and local wiring, and during the parallel iterative process increasing the number of wires for the power grid area to prevent a signal wire from having an active wire on either side of the signal wire; and
defining a vertical slice of wiring resources used for the space above a macro entity, and checking the macro entity with the context of the VLSI chip physical design above it; and
implementating a blockage modeling tool to accurately wire DRC correct wiring designs using automatic routing tools and wherein said blockage modeling tool keeps any adjacent wire at a spacing value greater than a minimum spacing away from a wire when the width of a wire is greater than a rule defined width. - View Dependent Claims (2)
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Specification