JPH0467753U

JPH0467753U -

Info

Publication number: JPH0467753U
Application number: JP10778690U
Authority: JP
Priority date: 1990-10-15
Filing date: 1990-10-15
Publication date: 1992-06-16

Description

[Brief explanation of the drawing]

第１図は本考案に係るメモリバツクアツプ回路
の構成図、第２図はバツクアツプ時の動作を示す
フローチヤート、第３図は復帰時の動作を示すフ
ローチヤートである。１……メモリバツクアツプ回路、２……演算回
路、３……書込み回路、４……メモリ、５……読
出し回路、６……逆演算回路、７……多数決回路
、ｊ，ｋ，ｍ……演算、ｊ′，ｋ′，ｍ′……逆
演算、Ｕ，Ｖ，Ｗ……アドレス。 FIG. 1 is a block diagram of a memory backup circuit according to the present invention, FIG. 2 is a flowchart showing operations during backup, and FIG. 3 is a flowchart showing operations during recovery. DESCRIPTION OF SYMBOLS 1...Memory backup circuit, 2...Arithmetic circuit, 3...Write circuit, 4...Memory, 5...Readout circuit, 6...Inverse arithmetic circuit, 7...Majority circuit, j, k, m... ...Operation, j', k', m'... Inverse operation, U, V, W... Address.

Claims

[Scope of utility model registration request]

A memory backup circuit that backs up a memory in which data can be written or read electrically includes an arithmetic circuit that calculates the data to be written into the memory into an odd number of different data, and an arithmetic circuit that converts the data to be written into the memory into an odd number of different data, and an arithmetic circuit that converts the data to be written into the memory into an odd number of different data. A write circuit that writes to addresses other than addresses, a read circuit that reads each written data, an inverse calculation circuit that performs an inverse operation on this read data to return it to the original data, and Compare the calculated odd number of data and select the same data as 1 by majority vote.
1. A memory backup circuit comprising: a majority circuit for selecting one.