[go: up one dir, main page]

JPS542026A - Memory unit - Google Patents

Memory unit

Info

Publication number
JPS542026A
JPS542026A JP6704877A JP6704877A JPS542026A JP S542026 A JPS542026 A JP S542026A JP 6704877 A JP6704877 A JP 6704877A JP 6704877 A JP6704877 A JP 6704877A JP S542026 A JPS542026 A JP S542026A
Authority
JP
Japan
Prior art keywords
memory unit
rewrite
destroyed
errors
enable
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.)
Pending
Application number
JP6704877A
Other languages
Japanese (ja)
Inventor
Kunio Ushijima
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 JP6704877A priority Critical patent/JPS542026A/en
Publication of JPS542026A publication Critical patent/JPS542026A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C7/00—Arrangements for writing information into, or reading information out from, a digital store
    • G11C7/24—Memory cell safety or protection circuits, e.g. arrangements for preventing inadvertent reading or writing; Status cells; Test cells

Landscapes

  • Storage Device Security (AREA)

Abstract

PURPOSE:To enable to rewrite for the location subjected to errors by adding error correction codes and providing a ROM switch the memory content is not destroyed with program run a way.
JP6704877A 1977-06-07 1977-06-07 Memory unit Pending JPS542026A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6704877A JPS542026A (en) 1977-06-07 1977-06-07 Memory unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6704877A JPS542026A (en) 1977-06-07 1977-06-07 Memory unit

Publications (1)

Publication Number Publication Date
JPS542026A true JPS542026A (en) 1979-01-09

Family

ID=13333560

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6704877A Pending JPS542026A (en) 1977-06-07 1977-06-07 Memory unit

Country Status (1)

Country Link
JP (1) JPS542026A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56134400A (en) * 1980-02-21 1981-10-21 Taimupuretsukusu Inc Memory protecting device and data processor having same device
JPS57143300A (en) * 1981-02-28 1982-09-04 Shimadzu Corp Computerized x-ray device
JPS57172600A (en) * 1981-04-17 1982-10-23 Omron Tateisi Electronics Co Program loading device of electronic equipment
JPS5958700A (en) * 1982-09-29 1984-04-04 Fujitsu Ltd Memory protection determination method
JPH04181803A (en) * 1990-11-16 1992-06-29 Yagi Antenna Co Ltd Tuning information storage system for communication satellite tuner
JPH07104999A (en) * 1993-10-07 1995-04-21 Nec Corp Microcomputer

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56134400A (en) * 1980-02-21 1981-10-21 Taimupuretsukusu Inc Memory protecting device and data processor having same device
JPS57143300A (en) * 1981-02-28 1982-09-04 Shimadzu Corp Computerized x-ray device
JPS57172600A (en) * 1981-04-17 1982-10-23 Omron Tateisi Electronics Co Program loading device of electronic equipment
JPS5958700A (en) * 1982-09-29 1984-04-04 Fujitsu Ltd Memory protection determination method
JPS6235702B2 (en) * 1982-09-29 1987-08-03 Fujitsu Ltd
JPH04181803A (en) * 1990-11-16 1992-06-29 Yagi Antenna Co Ltd Tuning information storage system for communication satellite tuner
JPH07104999A (en) * 1993-10-07 1995-04-21 Nec Corp Microcomputer

Similar Documents

Publication Publication Date Title
NL7902991A (en) ERROR CORRECTION SYSTEM.
DE3280247D1 (en) CODING PROCEDURE WITH ERROR CORRECTION.
JPS542026A (en) Memory unit
JPS52125242A (en) Multiple control memory unit
JPS53101936A (en) Data processor
JPS5331926A (en) Writing alteration circuit
ES247680U (en) Composite bituminous sheet, in particular for watertight elements.
JPS5338942A (en) Communication control unit
JPS5391637A (en) Data processor
JPS5383729A (en) Board key output detector for electronic insturment
JPS5335A (en) Contents rewriting method for fixed memory
JPS54163645A (en) Code error correcting device
JPS5223233A (en) Rom backup unit
JPS5294738A (en) Error correction system
IT7920296A0 (en) SOLUTION CONTAINING SELENOMETHIONINE-75 SE, WITH A THIOL AS STABILIZER.
JPS52121183A (en) Sequence controller
JPS52115608A (en) Error correction receiving system
JPS52126131A (en) Natural code typewriter
JPS53136441A (en) Memory unit
JPS52144927A (en) Data memorizing unit
JPS5329A (en) Memory
JPS5419341A (en) Information processor
JPS535941A (en) Program execution system
JPS52146277A (en) Time correcting device of electronic watches
JPS53127775A (en) Electronic wristwatch