DE3889390T2 - Schreibe-Schutzmechanismus für nichtflüchtigen Speicher. - Google Patents

Schreibe-Schutzmechanismus für nichtflüchtigen Speicher.

Info

Publication number
DE3889390T2
DE3889390T2 DE3889390T DE3889390T DE3889390T2 DE 3889390 T2 DE3889390 T2 DE 3889390T2 DE 3889390 T DE3889390 T DE 3889390T DE 3889390 T DE3889390 T DE 3889390T DE 3889390 T2 DE3889390 T2 DE 3889390T2
Authority
DE
Germany
Prior art keywords
volatile memory
protection mechanism
write protection
write
volatile
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 - Fee Related
Application number
DE3889390T
Other languages
English (en)
Other versions
DE3889390D1 (de
Inventor
Robert Wayne Sparks
Brian Freeland Wilkie
George Gordon Grimmer
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.)
Motorola Solutions Inc
Original Assignee
Motorola Inc
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 Motorola Inc filed Critical Motorola Inc
Application granted granted Critical
Publication of DE3889390D1 publication Critical patent/DE3889390D1/de
Publication of DE3889390T2 publication Critical patent/DE3889390T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F21/70—Protecting specific internal or peripheral components, in which the protection of a component leads to protection of the entire computer
    • G06F21/78—Protecting specific internal or peripheral components, in which the protection of a component leads to protection of the entire computer to assure secure storage of data
    • G06F21/79—Protecting specific internal or peripheral components, in which the protection of a component leads to protection of the entire computer to assure secure storage of data in semiconductor storage media, e.g. directly-addressable memories
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F12/00—Accessing, addressing or allocating within memory systems or architectures
    • G06F12/14—Protection against unauthorised use of memory or access to memory
    • G06F12/1458—Protection against unauthorised use of memory or access to memory by checking the subject access rights
    • G06F12/1466—Key-lock mechanism
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C16/00—Erasable programmable read-only memories
    • G11C16/02—Erasable programmable read-only memories electrically programmable
    • G11C16/06—Auxiliary circuits, e.g. for writing into memory
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C16/00—Erasable programmable read-only memories
    • G11C16/02—Erasable programmable read-only memories electrically programmable
    • G11C16/06—Auxiliary circuits, e.g. for writing into memory
    • G11C16/10—Programming or data input circuits
    • G11C16/102—External programming circuits, e.g. EPROM programmers; In-circuit programming or reprogramming; EPROM emulators
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C16/00—Erasable programmable read-only memories
    • G11C16/02—Erasable programmable read-only memories electrically programmable
    • G11C16/06—Auxiliary circuits, e.g. for writing into memory
    • G11C16/22—Safety or protection circuits preventing unauthorised or accidental access to memory cells
DE3889390T 1987-07-22 1988-07-18 Schreibe-Schutzmechanismus für nichtflüchtigen Speicher. Expired - Fee Related DE3889390T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/076,509 US4796235A (en) 1987-07-22 1987-07-22 Write protect mechanism for non-volatile memory

Publications (2)

Publication Number Publication Date
DE3889390D1 DE3889390D1 (de) 1994-06-09
DE3889390T2 true DE3889390T2 (de) 1994-12-01

Family

ID=22132466

Family Applications (1)

Application Number Title Priority Date Filing Date
DE3889390T Expired - Fee Related DE3889390T2 (de) 1987-07-22 1988-07-18 Schreibe-Schutzmechanismus für nichtflüchtigen Speicher.

Country Status (4)

Country Link
US (1) US4796235A (de)
EP (1) EP0300406B1 (de)
JP (1) JP2597153B2 (de)
DE (1) DE3889390T2 (de)

Families Citing this family (40)

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JPS6382534A (ja) * 1986-09-26 1988-04-13 Matsushita Electric Ind Co Ltd メモリ保護装置
US4918690A (en) * 1987-11-10 1990-04-17 Echelon Systems Corp. Network and intelligent cell for providing sensing, bidirectional communications and control
JP2712128B2 (ja) * 1988-10-11 1998-02-10 株式会社日立製作所 半導体記憶装置
US5083293A (en) * 1989-01-12 1992-01-21 General Instrument Corporation Prevention of alteration of data stored in secure integrated circuit chip memory
US5278786A (en) * 1989-04-11 1994-01-11 Mitsubishi Denki Kabushiki Kaisha Non-volatile semiconductor memory device having an area responsive to writing allowance signal
US5381366A (en) * 1989-04-11 1995-01-10 Mitsubishi Denki Kabushiki Kaisha Non-volatile semiconductor memory device with timer controlled re-write inhibit means
DE69033262T2 (de) * 1989-04-13 2000-02-24 Sandisk Corp EEPROM-Karte mit Austauch von fehlerhaften Speicherzellen und Zwischenspeicher
US7447069B1 (en) 1989-04-13 2008-11-04 Sandisk Corporation Flash EEprom system
US5197026A (en) * 1989-04-13 1993-03-23 Microchip Technology Incorporated Transparent EEPROM backup of DRAM memories
US5142688A (en) * 1989-11-03 1992-08-25 Motorola, Inc. Data processor test mode access method
US6009495A (en) * 1989-12-29 1999-12-28 Packard Bell Nec Protected address range in an electrically erasable programmable read only memory
FI86922C (fi) * 1990-01-05 1992-10-26 Raha Automaattiyhdistys Foerfarande och anordning foer kontrollering av inskrivning i ett minne
NL9000940A (nl) * 1990-04-20 1991-11-18 Nedap Nv Universeel identificatie label.
US5546561A (en) * 1991-02-11 1996-08-13 Intel Corporation Circuitry and method for selectively protecting the integrity of data stored within a range of addresses within a non-volatile semiconductor memory
US5226006A (en) * 1991-05-15 1993-07-06 Silicon Storage Technology, Inc. Write protection circuit for use with an electrically alterable non-volatile memory card
WO1993010498A1 (en) * 1991-11-12 1993-05-27 Microchip Technology Inc. Security for on-chip microcontroller memory
US6414878B2 (en) 1992-03-17 2002-07-02 Hitachi, Ltd. Data line disturbance free memory block divided flash memory and microcomputer having flash memory therein
TW231343B (de) * 1992-03-17 1994-10-01 Hitachi Seisakusyo Kk
US5687345A (en) * 1992-03-17 1997-11-11 Hitachi, Ltd. Microcomputer having CPU and built-in flash memory that is rewritable under control of the CPU analyzing a command supplied from an external device
US7057937B1 (en) 1992-03-17 2006-06-06 Renesas Technology Corp. Data processing apparatus having a flash memory built-in which is rewritable by use of external device
US5630143A (en) * 1992-03-27 1997-05-13 Cyrix Corporation Microprocessor with externally controllable power management
US6343363B1 (en) * 1994-09-22 2002-01-29 National Semiconductor Corporation Method of invoking a low power mode in a computer system using a halt instruction
US5632037A (en) * 1992-03-27 1997-05-20 Cyrix Corporation Microprocessor having power management circuitry with coprocessor support
JPH06202762A (ja) * 1992-10-30 1994-07-22 Nippon Motorola Ltd ライトデータ保護機能付きリセット信号発生回路
FR2700402B1 (fr) * 1993-01-13 1995-04-07 Sgs Thomson Microelectronics Microcontrôleur à mémoire électriquement programmable multimode.
JPH08503328A (ja) * 1993-07-29 1996-04-09 アトメル・コーポレイション マイクロコントローラのための遠隔再プログラム可能プログラムメモリ
US5467396A (en) * 1993-10-27 1995-11-14 The Titan Corporation Tamper-proof data storage
US5394367A (en) * 1994-03-18 1995-02-28 Ramtron International Corporation System and method for write-protecting predetermined portions of a memory array
US5764995A (en) * 1994-03-25 1998-06-09 Packard Bell Nec Write once read only registers
JPH08235073A (ja) * 1995-02-28 1996-09-13 Nec Kyushu Ltd マイクロコンピュータ
US5778444A (en) * 1996-05-06 1998-07-07 Motorola, Inc. Method and apparatus for reset-sensitive and controlled register write accesses in a data processing system with user and test modes
US5890191A (en) * 1996-05-10 1999-03-30 Motorola, Inc. Method and apparatus for providing erasing and programming protection for electrically erasable programmable read only memory
EP0825530A3 (de) * 1996-06-20 2004-06-02 Sharp Kabushiki Kaisha Rechnergerät mit elektrischem wiederschreibbarem nichtflüchtigem Speicher und nichtflüchtiger Halbleiterspeicher
US5974500A (en) * 1997-11-14 1999-10-26 Atmel Corporation Memory device having programmable access protection and method of operating the same
US6996721B2 (en) * 2001-03-27 2006-02-07 Micron Technology, Inc. Flash device security method utilizing a check register
EP1248200A1 (de) * 2001-04-06 2002-10-09 Micronas GmbH Verriegelungsschaltung zur Verhinderung eines unzulässigen Zugriffs auf die Speichereinrichtung eines Prozessors
EP1764803A1 (de) * 2005-09-09 2007-03-21 STMicroelectronics S.r.l. Speicherarchitektur mit serieller Peripherieschnittstelle
US8549260B2 (en) * 2009-01-29 2013-10-01 Infineon Technologies Ag Apparatus for processing data and method for generating manipulated and re-manipulated configuration data for processor
EP2221825A1 (de) * 2009-02-05 2010-08-25 Thomson Licensing Nichtflüchtige Speichervorrichtung mit fälschungssicherer Festwertspeicheroption
DE102012101343B4 (de) * 2012-02-20 2015-01-08 Avisaro AG Mobiler Datenträger und Steuerprogramm dafür

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3123444A1 (de) * 1981-06-12 1983-01-05 Siemens AG, 1000 Berlin und 8000 München Verfahren und anordnung zum nichtfluechtigen speichern des zaehlerstandes einer elektronischen zaehlschaltung
US4578774A (en) * 1983-07-18 1986-03-25 Pitney Bowes Inc. System for limiting access to non-volatile memory in electronic postage meters
US4580246A (en) * 1983-11-02 1986-04-01 Motorola, Inc. Write protection circuit and method for a control register
US4644494A (en) * 1984-02-06 1987-02-17 Sundstrand Data Control, Inc. Solid state memory for aircraft flight data recorder systems
JPS6124091A (ja) * 1984-07-12 1986-02-01 Nec Corp メモリ回路
US4612632A (en) * 1984-12-10 1986-09-16 Zenith Electronics Corporation Power transition write protection for PROM

Also Published As

Publication number Publication date
JPS6437642A (en) 1989-02-08
EP0300406B1 (de) 1994-05-04
JP2597153B2 (ja) 1997-04-02
US4796235A (en) 1989-01-03
EP0300406A2 (de) 1989-01-25
DE3889390D1 (de) 1994-06-09
EP0300406A3 (de) 1992-01-15

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee