Importance

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Abstract

According to one embodiment, a method of designing an input/output circuit which includes input/output cells of a semiconductor device is provided. The method uses a computer which has a schematic generating unit and a layout generating unit. By the schematic generating unit, a symbol of one input/output cell is arranged on a schematic diagram so as to generate schematic data. The symbol has pins including a through pin, a power pin and information indicating power rails. The symbol is capable of being set so as to connect the through pin of the symbol to a pin of a symbol of another input/output cell or to the power pin of the symbol of the one input/output cell itself selectively. After generating the schematic data, the connection is set. Further, layout data is generated by the layout generating unit.

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First Claim