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:
Jan. 28, 1997
Filed:
Feb. 17, 1995
Applicant:
Inventors:
Dan T Tran, Laguna Niguel, CA (US);
Wayne C Datwyler, Laguna Niguel, CA (US);
Long V Ha, Walnut, CA (US);
Assignee:
Unisys Corporation, Blue Bell, PA (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01R / ;
U.S. Cl.
CPC ...
371 223 ;
Abstract
The logic circuitry of an IC chip is connected to JTAG register chains which hold state information on each portion of the logic circuitry therein. A JTAG Tracker Module is connected to the controls of each of the JTAG register chains enabling a programmer-operator to read the present state of each JTAG register chain and enabling a readout of the logic circuits condition in a single clock period.