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. 05, 1995
Filed:
Oct. 29, 1992
Applicant:
Inventor:
Robert J Russell, South Boston, MA (US);
Assignee:
Bull HN Information Systems Inc., Billerica, MA (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04B / ;
U.S. Cl.
CPC ...
371 223 ; 371 151 ; 371 251 ;
Abstract
A method and apparatus provides improved modes of operation of a standard test bus based on a standard boundary scan architecture which minimizes the number of bits required to be serially scanned into the controllers of the various devices connected to the bus by temporarily disabling scan paths not required to be utilized. Means for continuously verifying the inoperative state of test logic and for diagnosing test logic faults are also described.