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:
Jul. 27, 1993
Filed:
Dec. 10, 1990
Tutomu Itoh, Kanagawa, JP;
Tatsuki Ishii, Tokyo, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
For signal lines to be connected from an LSI device or a module including a plurality of LSI devices as a mounted part via input/output pins thereof to external devices, pin assignment positions are determined as follows. The signal lines are classified into groups depending on attributes thereof. Priority levels are determined for the resultant groups according to the attributes. Based on relationships with respect to arrangement positions of the mounted parts to be connected to the signal lines, provisional pin positions are computed so as to minimize wiring lengths between the mounted parts. The input/output pins are assigned to the provisional pin positions for each signal line group in an order of the priority levels.