JPS5557161A - Error checking system - Google Patents

Error checking system

Info

Publication number
JPS5557161A
JPS5557161A JP13015078A JP13015078A JPS5557161A JP S5557161 A JPS5557161 A JP S5557161A JP 13015078 A JP13015078 A JP 13015078A JP 13015078 A JP13015078 A JP 13015078A JP S5557161 A JPS5557161 A JP S5557161A
Authority
JP
Japan
Prior art keywords
bit
bit error
bits
circuit
error
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP13015078A
Other languages
Japanese (ja)
Other versions
JPS6010661B2 (en
Inventor
Shiro Hoshi
Shigeru Kaneko
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP53130150A priority Critical patent/JPS6010661B2/en
Publication of JPS5557161A publication Critical patent/JPS5557161A/en
Publication of JPS6010661B2 publication Critical patent/JPS6010661B2/en
Expired legal-status Critical Current

Links

Landscapes

  • For Increasing The Reliability Of Semiconductor Memories (AREA)
  • Tests Of Electronic Circuits (AREA)
  • Detection And Correction Of Errors (AREA)

Abstract

PURPOSE: To secure the correct detection for the 3-bit error by distinguishing the 3-bit error from the 1-bit error in the form of the multiple bits without increasing the redundant bits in the 1-bit error correction 2-bit error detection circuit.
CONSTITUTION: Original information 10 of 64 bits is supplied to check bit production circuit 11 to produce 1-bit/2-bit error detection check bit 12 of the 8-bit structure. Bit 12 is applied to the original information and then written into semiconductor memory 13 in the form of the writing data of 72 bits. In memory 13 the IC memory elements which are read out simultaneously from one chip with every 4 bits exist in 18 chips, and data 14 of 72 bits is divided by 4 bits into 18 blocks to be memorized in each chip. Data 14 is then applied to 1-bit error correction / 2-bit error detection circuit 15 comprising check circuit 16, error decision circuit 17 and error correction circuit 18 each. Circuit 16 decides whether data 14 is the 1-bit error or the uncorrectable 2-bit error, and then deliveres error indication signal 19 in the case of the 1-bit error and error detection signal 20 in the case of the 2-bit error respectively.
COPYRIGHT: (C)1980,JPO&Japio
JP53130150A 1978-10-23 1978-10-23 Error checking method Expired JPS6010661B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP53130150A JPS6010661B2 (en) 1978-10-23 1978-10-23 Error checking method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP53130150A JPS6010661B2 (en) 1978-10-23 1978-10-23 Error checking method

Publications (2)

Publication Number Publication Date
JPS5557161A true JPS5557161A (en) 1980-04-26
JPS6010661B2 JPS6010661B2 (en) 1985-03-19

Family

ID=15027167

Family Applications (1)

Application Number Title Priority Date Filing Date
JP53130150A Expired JPS6010661B2 (en) 1978-10-23 1978-10-23 Error checking method

Country Status (1)

Country Link
JP (1) JPS6010661B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5878241A (en) * 1981-11-04 1983-05-11 Nippon Telegr & Teleph Corp <Ntt> Error detecting and correcting system for coded data
JPH1011307A (en) * 1996-06-27 1998-01-16 Nec Corp Main storage device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5878241A (en) * 1981-11-04 1983-05-11 Nippon Telegr & Teleph Corp <Ntt> Error detecting and correcting system for coded data
JPH1011307A (en) * 1996-06-27 1998-01-16 Nec Corp Main storage device

Also Published As

Publication number Publication date
JPS6010661B2 (en) 1985-03-19

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