Area forecasting manner of semiconductor integrated circuit, area forecasting system and its record media

摘要

PROBLEM TO BE SOLVED: To accurately obtain the area of a minimum chip, by a method wherein data on an inner layout type of a chip is taken into consideration. ;SOLUTION: Data on a layout type are used as parameters, and an overall length L of wiring is calculated in a processor 9 through a calculation formula where L is a function represented by a gate use rate u and the number G of gates, wherein the total number GALL of gates of a target circuit obtained through a circuit data memory 6 is substituted for the number G. A total wiring track volume T is calculated through a calculation formula where T is a function represented by a gate use rate u and the number G of gates, wherein the total number GALL of gates is substituted for the number G of gates, and a gate use rate u which satisfies a formula, L=T, is obtained as a gate use rate limit uLIM_iT, where L and T are obtained through the calculation formulas of the overall length L of wiring and the total wiring track volume T, and the total number GALL of gates is substituted for the number G of gates. A minimum chip are AMIN where a target circuit can be built in is obtained on the basis of the gate use rate limit uLIM_iT.;COPYRIGHT: (C)1999,JPO