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:
Jun. 12, 2012

Filed:

Sep. 21, 2009
Applicants:

Kenichi Anzou, Kawasaki, JP;

Chikako Tokunaga, Yokohama, JP;

Inventors:

Kenichi Anzou, Kawasaki, JP;

Chikako Tokunaga, Yokohama, JP;

Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01R 31/28 (2006.01); G06F 11/00 (2006.01);
U.S. Cl.
CPC ...
Abstract

A semiconductor integrated circuit includes memories, a BIST circuit, and an analyzer. The BIST circuit includes a test controller performing the test and generating a memory selection signal selecting a memory to be tested, an address generator generating write and read addresses, a data generator generating write data and an expected output value, and a control signal generator generating a control signal. The analyzer includes a memory output selector selecting output data, a bit comparator comparing the output data with the expected output value, an error detection unit determining whether there is an error in the memory, a plurality of pass/fail flag registers capable of storing a pass/fail flag, a repair analyzer analyzing a memory error and generating a repair analysis result, a plurality of repair analysis result registers capable of storing the repair analysis result, and an output unit outputting the pass/fail flag and the repair analysis result.


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