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. 16, 2010
Filed:
Feb. 22, 2010
Howard Tang, San Jose, CA (US);
Ju Shen, San Jose, CA (US);
San-ta Kow, San Jose, CA (US);
Lattice Semiconductor Corporation, Hillsboro, OR (US);
Abstract
In embodiment of the invention, a programmable logic device includes configuration memory adapted to be programmed with configuration data and a plurality of programmable fuses adapted to store a security key for use with configuration data. The security key includes a plurality of data bit values, wherein each data bit value of the security key is associated with a subset of a least three fuses each storing a bit. Each of a plurality of decoders is adapted to retrieve a data bit value of the security key by providing the bit value stored by a majority of the fuses of the associated subset as the data bit value of the security key.