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.

Date of Patent:
Sep. 03, 2002

Filed:

Jul. 13, 2000
Applicant:
Inventors:

Christopher L. Mobley, Coppell, TX (US);

Timothy D. Anderson, Dallas, TX (US);

Charles L. Fuoco, Allen, TX (US);

Sanjive Agarwala, Richardson, TX (US);

Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F 1/750 ; G06F 1/200 ; G06F 1/214 ; G11C 2/900 ;
U.S. Cl.
CPC ...
G06F 1/750 ; G06F 1/200 ; G06F 1/214 ; G11C 2/900 ;
Abstract

A method generates a list of allowed states in a cache design by applying each input transaction sequentially to all found legal cache states. If application of an input transaction to a current search cache results in a new cache state, then this new cache state is added to the list of legal cache states and to a list of search cache states. This is repeated for all input transactions and all such found legal cache states. At the same time a sequence of input transactions reaching each new cache state is formed. This new sequence is the sequence of input transactions for the prior cache state and the current input transaction. The method generates a series of test sequences from the list of allowed states and their corresponding sequence of input transactions which are applied to the control logic cache design and to a reference memory. If the response of the control logic cache design fails to match the response of the reference memory, then a design fault is detected.


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