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, 2007
Filed:
Jan. 13, 2005
Satwant Singh, Fremont, CA (US);
Chi Nguyen, San Jose, CA (US);
Ann Wu, San Jose, CA (US);
Ting Yew, San Jose, CA (US);
Satwant Singh, Fremont, CA (US);
Chi Nguyen, San Jose, CA (US);
Ann Wu, San Jose, CA (US);
Ting Yew, San Jose, CA (US);
Lattice Semiconductor Corporation, Hillsboro, OR (US);
Abstract
In one embodiment, a programmable logic device is provided that includes a memory having memory cells, each memory cell operable to store either a configuration bit or a RAM bit; a masking circuit operable to mask a RAM bit by providing a masking value for the masked RAM bit; an error detection circuit operable to process the configuration bits during operation of the programmable logic device using an error detection algorithm, the error detection circuit calculating a signature that includes configuration bits and masking values; and a comparator operable to compare the signature calculated by the error detection circuit with a correct signature.