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:
Aug. 14, 2001
Filed:
Dec. 22, 1997
Om P. Agrawal, Los Altos, CA (US);
Herman M. Chang, Cupertino, CA (US);
Bradley A. Sharpe-Geisler, San Jose, CA (US);
Giap H. Tran, San Jose, CA (US);
Vantis Corporation, Sunnyvale, CA (US);
Abstract
A Field Programmable Gate Array (FPGA) device includes a plurality of variable grain blocks (VGBs) and a plurality of interconnect lines for providing program-defined routing of signals between the VGBs. The VGBs include a plurality of L-organized CBBs (configurable logic blocks) having function-producing resources. Each CBB includes 6 term inputs, 2 control inputs and one direct connect output. Each CBB includes two configurable building elements having 3 term inputs and 1 control input, respectively. The plurality of interconnect lines includes a direct connect architecture for providing programmably-selectable, dedicated connections between a center VGB, in particular a CBB, and neighboring VGBs. The direct connect architecture and positioning of inputs and outputs enables 1) enhanced flexibility and efficiency in the configuration placement and routing software 2) efficiently emulates random logic nets and 3) reduces many direct connect line wire lengths.