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. 16, 2001
Filed:
Mar. 08, 1999
Matushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
For enabling the self-test of a memory with a small number of input and output pins, and the burn-in tests of a memory and a logic to be carried out simultaneously in a memory/logic circuit mixed system LSI, a test data, an address and a memory control signal required for the test of the memory are generated using the divided-frequency output signal of an address generator, i.e., frequency-divider of an external clock, and a mixer circuit for periodically inverting a pass/fail signal as the test result is provided. This enables the test of the memory with a total of 2 pins of input and output in all. Thus, it becomes possible to test the memory and the logic circuit simultaneously at the time of burn-in test thereof.