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:
Jun. 21, 2011
Filed:
Apr. 11, 2008
Ralf Ludewig, Schoenaich, DE;
Walter Niklaus, Jettingen, DE;
Dietmar Schmunkamp, Schoenaich, DE;
Scott Barnett Swaney, Germantown, NY (US);
Tobias Webel, Schwaebisch Gmuend, DE;
Ralf Ludewig, Schoenaich, DE;
Walter Niklaus, Jettingen, DE;
Dietmar Schmunkamp, Schoenaich, DE;
Scott Barnett Swaney, Germantown, NY (US);
Tobias Webel, Schwaebisch Gmuend, DE;
International Business Machines Corporation, Armonk, NY (US);
Abstract
A method for automatic scan completion in the event of a system checkstop in a processor. The processor includes: a processor register; a millicode interface connected between the processor register and a checkstop scan controller; a checkstop logic circuit connected between the checkstop scan controller and a checkstop scan engine; and a scan chain engine and a scan chain connected to the checkstop scan engine. The method includes (a) upon occurrence of a checkstop serially reading data from a processor register and serially writing the data to latches of a scan chain register; and (b) upon occurrence of a system checkstop during (a), stopping the reading and writing and moving data sent before the system checkstop from latches of the scan chain where the data was stored when the system checkstop occurred to latches where the data would have been stored if the system checkstop had not occurred.