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:
Oct. 25, 1988
Filed:
Aug. 06, 1986
Applicant:
Inventor:
Kikuo Sakai, Fussa, JP;
Assignees:
Hitachi, Ltd., Tokyo, JP;
Hitachi VLSI Engineering Corp., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F / ;
U.S. Cl.
CPC ...
371 38 ;
Abstract
A semiconductor memory incorporating an ECC circuit includes a memory array, means for selecting a plurality of bits which are to be simultaneously output to the outside of the IC from a plurality of bits which are simultaneously read out from the memory array, and an error correcting circuit which constitutes the ECC circuit. The selecting means is provided in a stage previous to the error correcting circuit. In consequence, it is possible to reduce the number of bits of a signal which need to be simultaneously processed by the error correcting circuit. Accordingly, the size of the ECC circuit can be reduced.