Title:
SEMICONDUCTOR STORAGE DEVICE AND USAGE METHOD AS WELL AS STORAGE MEDIUM WITH STORED USAGE METHOD
Document Type and Number:
Japanese Patent JP3513379
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To obtain a semiconductor storage device in which an error can be corrected with good efficiency and precisely even when its integration degree is increased by a method wherein the number of possible pieces of discrimination numbers is made at least twice the number of possible pieces of data trains to be input, a prescribed discrimination number is allocated to every data string so as to be stored in a corresponding memory cell, it is regarded as corresponding to a first transition when it is read and the error is corrected.
SOLUTION: An EEPROM is provided with a memory cell 12 in which converted data us retained and with a decoding circuit 13 which corrects an error so as to be decoded. When binary data which is composed of '0' or '1' is input, a coding circuit 11 divides the data into one bit each so as to form data composed of '0' or '1'. The data is allocated to '1' or '3' among from discrimination numbers composed of four values of '0', '1', '2' and '3' so as to be stored in one memory cell. Thereby, the input data '0' is converted into a discrimination number '1', and the input data '1' is converted into a discrimination number '3'.
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Inventors:
Nakajima, Tatsuo
Application Number:
JP35623297A
Publication Date:
March 31, 2004
Filing Date:
December 09, 1997
Export Citation:
Assignee:
NIPPON STEEL CORP
International Classes:
G11C16/06; G11C16/02; G11C29/00; G11C29/42; (IPC1-7): G11C29/00; G11C16/02; G11C16/06
Attorney, Agent or Firm:
國分 孝悦