The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 25, 2003
Filed:
Sep. 20, 2000
Haruo Nishida, Chofu, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
A macro cell creating method capable of accurately calculating the delay values regarding input/output terminals of a macro cell and efficiently designing a high-speed macro cell. The macro cell creating method includes a first step for creating a frame of a macro cell based on a size estimate of a circuit, a second step for disposing provisional external input/output terminals on the frame of the macro cell based on input/output terminal information of the circuit, a third step for adding connection information of the provisional external input/output terminals with actual input/output terminals to circuit connection information, a fourth step for disposing basic function cells based on the circuit connection information, a fifth step for wiring the basic function cells, a sixth step for deleting wired lines between the provisional external input/output terminals and the actual input/output terminals, and a seventh step for creating macro cell layout data.