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:
Mar. 02, 2010
Filed:
May. 01, 2003
Madhusudhan R. Penugonda, San Diego, CA (US);
Michael W. Johnson, Escondido, CA (US);
Eric J. Sprunk, Carlsbad, CA (US);
An Tonthat, San Diego, CA (US);
Madhusudhan R. Penugonda, San Diego, CA (US);
Michael W. Johnson, Escondido, CA (US);
Eric J. Sprunk, Carlsbad, CA (US);
An Tonthat, San Diego, CA (US);
General Instrument Corporation, Horsham, PA (US);
Abstract
According to the invention, a circuit that is capable of automated scan testing is disclosed. Included in the circuit are a cryptographic engine, a digital circuit, an input pin, and an output pin. The cryptographic engine capable of performing at least one of encryption and decryption of one or more digital signals. The digital circuit includes combinatorial logic and a number of memory cells. The memory cells have scan inputs connected serially in a scan chain. The input pin and output pin are coupled to the scan chain. At least one of the input pin and the output pin carries at least some cipher text data of the scan chain.