Patent ID: 7370293
Filing Date: 2008-05-06
Classification: G06F

Abstract:
1. An integrated circuit design system for designing an integrated circuit based on circuit data describing a logic circuit by a hierarchical structure in which a lower hierarchical block is included in an upper hierarchical block, comprising: a circuit data generating means for acquiring first circuit data describing a first hierarchical block to which a supply of power should be cut off in response to a control signal and generating second circuit data describing a second hierarchical block with a lower level comprised by said first hierarchical block and a virtual power switch cell to which said control signal is input so that said virtual power switch cell of said second circuit data corresponds to at least one power switch cell in a real circuit, wherein: said circuit data generating means includes a first circuit data generating means for generating circuit data describing said second hierarchical block based on circuit data describing said first hierarchical block and a second circuit data generating means for generating circuit data describing by said hierarchical structure a logic circuit comprised by combining predetermined circuit cells by logic combining processing on circuit data generated at said first circuit data generating means and has a table preparing means for retrieving a power switch cell from the circuit data generated at said second circuit data generating means and preparing a table linking information instructing the power switch cell found by the retrieval and information individually instructing all circuit cells in the hierarchical block belonging to the same level as the power switch cell.