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. 22, 2011
Filed:
Nov. 19, 2008
Tobias Gemmeke, Stutensee, DE;
Dieter Wendel, Schoenaich, DE;
Holger Wetter, Weil im Schoenbuch, DE;
Jens Leenstra, Bondorf, DE;
Tobias Gemmeke, Stutensee, DE;
Dieter Wendel, Schoenaich, DE;
Holger Wetter, Weil im Schoenbuch, DE;
Jens Leenstra, Bondorf, DE;
International Business Machines Corporation, Armonk, NY (US);
Abstract
A digital system and method for scanning sequential logic elements are disclosed. The digital system may comprise a plurality of sequential logic elements subdivided into power domains, wherein at least one of the power domains is power gated; a scan chain configured for processing a scan data sequence; a scan enable switch configured for controlling a scan mode; and at least one shadow engine, wherein the at least one shadow engine comprises a control circuit. At least some of the power domains may be interconnected to the scan chain with the scan enable switch, and the scan enable switch may control the scan mode by asserting a scan enable signal. The at least one power gated power domain with one or more sequential logic elements to be power gated may be bypassed via the at least one shadow engine.