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. 02, 1997
Filed:
Jul. 24, 1996
Leland Leslie Day, Rochester, MN (US);
Steven Michael Douskey, Rochester, MN (US);
Paul Allen Ganfield, Rochester, MN (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A system and method for reducing simultaneous switching during scan-based testing of a system logic design. System logic is divided into clusters of system logic, and one or more scan chains are associated with each logic cluster. Each of the logic clusters are concurrently scan tested, yet circuitry in the scan chains associated with a cluster are triggered at different times than the circuitry in the scan chains of other clusters. Offset scan control signals provide the triggering for the scan chains of different clusters. Release and capture functions are also controlled to reduce simultaneous release and capture switching in different clusters.