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:
Nov. 28, 2000
Filed:
Apr. 27, 1998
Benny Ma, Saratoga, CA (US);
Clement Lee, Portland, OR (US);
Lattice Semiconductor Corporation, Hillsboro, OR (US);
Abstract
A programmable logic device having an internal tristate bus is provided. The internal tristate bus may be driven by a plurality of driving elements. Such a tristate bus, and the circuitry for supporting it, can be implemented on less surface area than the multitude of unidirectional buses, and supporting circuitry, which would otherwise be required for the same plurality of driving elements. Accordingly, the amount of surface area that is required to move information within a programmable logic device is reduced. Furthermore, in one embodiment, a arbitration logic circuit is provided for each driving element. These arbitration logic circuits cooperate to prevent the different elements from simultaneously driving the internal tristate bus. Accordingly, the integrity of the information on such bus is maintained.