JPS6230462B2 - - Google Patents

Info

Publication number
JPS6230462B2
JPS6230462B2 JP56021097A JP2109781A JPS6230462B2 JP S6230462 B2 JPS6230462 B2 JP S6230462B2 JP 56021097 A JP56021097 A JP 56021097A JP 2109781 A JP2109781 A JP 2109781A JP S6230462 B2 JPS6230462 B2 JP S6230462B2
Authority
JP
Japan
Prior art keywords
data
output
level
data memory
counter
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.)
Expired
Application number
JP56021097A
Other languages
English (en)
Japanese (ja)
Other versions
JPS57135500A (en
Inventor
Kazuki Tsuruta
Mitsuo Suzuki
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.)
NEC Corp
Original Assignee
Nippon Electric Co 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 Nippon Electric Co Ltd filed Critical Nippon Electric Co Ltd
Priority to JP56021097A priority Critical patent/JPS57135500A/ja
Publication of JPS57135500A publication Critical patent/JPS57135500A/ja
Publication of JPS6230462B2 publication Critical patent/JPS6230462B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Storage Device Security (AREA)
  • Techniques For Improving Reliability Of Storages (AREA)
JP56021097A 1981-02-16 1981-02-16 Data memory protecting circuit Granted JPS57135500A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56021097A JPS57135500A (en) 1981-02-16 1981-02-16 Data memory protecting circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56021097A JPS57135500A (en) 1981-02-16 1981-02-16 Data memory protecting circuit

Publications (2)

Publication Number Publication Date
JPS57135500A JPS57135500A (en) 1982-08-21
JPS6230462B2 true JPS6230462B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1987-07-02

Family

ID=12045362

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56021097A Granted JPS57135500A (en) 1981-02-16 1981-02-16 Data memory protecting circuit

Country Status (1)

Country Link
JP (1) JPS57135500A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6275852A (ja) * 1985-09-30 1987-04-07 Toshiba Corp 半導体記憶装置
JPS62286143A (ja) * 1986-06-04 1987-12-12 Oki Electric Ind Co Ltd 半導体記憶装置
JPS6329859A (ja) * 1986-07-23 1988-02-08 Sony Tektronix Corp 記憶保護装置
US5001670A (en) * 1987-02-06 1991-03-19 Tektronix, Inc. Nonvolatile memory protection
JPS63200254A (ja) * 1987-02-16 1988-08-18 Nec Corp メモリ書込制御回路
JPS6446864A (en) * 1987-08-17 1989-02-21 Mitsubishi Electric Corp Microcomputer
JPH02281351A (ja) * 1989-04-21 1990-11-19 Aida Eng Ltd メモリ保護回路
JPH05143478A (ja) * 1991-11-20 1993-06-11 Sharp Corp 不揮発性メモリ内容保護装置

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS594799B2 (ja) * 1979-03-26 1984-01-31 三菱電機株式会社 メモリ装置

Also Published As

Publication number Publication date
JPS57135500A (en) 1982-08-21

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