Automatic placement and routing apparatus automatically inserting a capacitive cell

摘要

A redundancy detection unit refers to layout data stored in a data storage unit and reflecting completed automatic placement and routing to detect a redundant region in a region having a cell arranged therein. An automatic insertion unit inserts in the detected redundant region a capacitive cell having a capacitive component and free of logic. As such a voltage drop can be reduced in a region scarce of LSI wiring resources. Furthermore, increased wiring capacitance can be provided without increased LSI chip area.