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. 25, 1995
Filed:
Nov. 15, 1993
Pierre Sauvage, Champ Sur Drac, FR;
Hewlett-Packard Company, Palo Alto, CA (US);
Abstract
The present invention relates to a testing method for an intermediate circuit between a microprocessor and surrounding circuits comprising a first set of access routes including lines of a data bus (D) and a control bus (C), and a second set of access paths comprising lines (AH) connected to other lines (CS) through a processing circuit (40). This method consists in providing in the intermediate circuit a test register (46) addressable by addresses ignored by the other elements of the circuit; writing test words in the test register through either one of the first and second set of as paths; reading the written words in the test register through the other set of access paths; and checking whether the read words correspond in a predetermined way to the test words.