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. 11, 1995
Filed:
Sep. 17, 1993
Toshihide Tsuboi, Tokyo, JP;
NEC Corporation, , JP;
Abstract
An information processing device according to the present invention includes a logical circuit which outputs a signal for indicating that an error correction has been conducted on a data, when an error check and correction (ECC) circuit detects and corrects an error of data at the time of reading data from a memory cell array of an electrically erasable programmable ROM (EEPROM). In the information processing device of the present invention, while the EEPROM outputs the correct data by means of the ECC circuit, it can be known whether there exists an error even in a part of the cells in the EEPROM, so that it is possible to alter an address of a memory cell containing an erroneous bit in the EEPROM or to change the EEPROM itself before malfunction occurs in the information processing device having the EEPROM due to a breakdown of the memory cells in the EEPROM.