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:
Dec. 30, 2003
Filed:
Oct. 05, 2000
Applicant:
Inventor:
Farideh Golshan, Mountain View, CA (US);
Assignee:
Sun Microsystems, Inc., Santa Clara, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01R 3/128 ;
U.S. Cl.
CPC ...
G01R 3/128 ;
Abstract
A series of secondary or “shadow” storage elements are employed that duplicate, or “shadow”, the information in a circuit's core logic primary storage elements. These shadow storage elements are then coupled to form a separate, independently-addressable shadow scan path. The information contained in the primary storage elements is then scanned out via the shadow scan path without altering the primary storage elements using special commands issued from a JTAG controller. This shadow scan system allows a circuit to remain operational while a snapshot of the core logic information is scanned out.