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:
Oct. 03, 2006
Filed:
Nov. 28, 2000
Stephen M. Trimberger, San Jose, CA (US);
Raymond C. Pang, San Jose, CA (US);
Walter N. Sze, Saratoga, CA (US);
Jennifer Wong, Fremont, CA (US);
Kameswara K. Rao, San Jose, CA (US);
Stephen M. Trimberger, San Jose, CA (US);
Raymond C. Pang, San Jose, CA (US);
Walter N. Sze, Saratoga, CA (US);
Jennifer Wong, Fremont, CA (US);
Kameswara K. Rao, San Jose, CA (US);
XILINX, Inc., San Jose, CA (US);
Abstract
It is sometimes desirable to protect a design used in a PLD from being copied. If the design is stored in a different device from the PLD and read into the PLD through a bitstream, an unencrypted bitstream could be observed and copied as it is being loaded. According to the invention, a bitstream for configuring a PLD with an encrypted design includes unencrypted words for controlling loading of the configuration bitstream and encrypted words that actually specify the design.