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:
Jul. 06, 2010
Filed:
Jan. 24, 2007
Itsuo Hidaka, Kanagawa, JP;
Itsuo Hidaka, Kanagawa, JP;
NEC Corporation, Kanagawa, JP;
Abstract
A semiconductor integrated circuit includes: a first circuit having a plurality of scan chains; a second circuit connected with input/output signals of the first circuit; and a third circuit connected with the second circuit through the first circuit. The plurality of scan chains comprises a first scan chain that contains flip-flops whose input/output signals are connected with the second circuit, and a second scan chain that does not contain any flip-flop whose input/output signal is connected with the second circuit. The flip-flops operate as a shift register at a scan path test, and when the third circuit exchanges signals with the second circuit through the flip-flops of the first scan chain, the second scan chain of the first circuit operates as a shift register.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile