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:
Sep. 04, 2007
Filed:
Mar. 18, 2002
William C. Moyer, Dripping Springs, TX (US);
Michael D. Fitzsimmons, Austin, TX (US);
William C. Moyer, Dripping Springs, TX (US);
Michael D. Fitzsimmons, Austin, TX (US);
Freescale Semiconductor, Inc., Austin, TX (US);
Abstract
The invention relates to an integrated circuit (IC), and more particularly to security to protect an IC () against unauthorized accesses. In one embodiment, an identifier is provided external to IC. A corresponding input IC security key () is then provided to ICand compared to a stored IC security key (). If the input IC security key () and the stored IC security key () do not match, access to protected functional circuitry () is prohibited. The present invention may use any debug interface, including standard debug interfaces using the JTAG 1149.1 interface defined by the IEEE.