DE69425366D1 - System und Verfahren zur Schreibschutz bestimmter Teile eines Speicherarrays - Google Patents

System und Verfahren zur Schreibschutz bestimmter Teile eines Speicherarrays

Info

Publication number
DE69425366D1
DE69425366D1 DE69425366T DE69425366T DE69425366D1 DE 69425366 D1 DE69425366 D1 DE 69425366D1 DE 69425366 T DE69425366 T DE 69425366T DE 69425366 T DE69425366 T DE 69425366T DE 69425366 D1 DE69425366 D1 DE 69425366D1
Authority
DE
Germany
Prior art keywords
memory array
certain parts
write protection
write
protection
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
DE69425366T
Other languages
English (en)
Other versions
DE69425366T2 (de
Inventor
Jeffery E Downs
Michael W Yeager
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.)
Ramtron International Corp
Original Assignee
Ramtron International Corp
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 Ramtron International Corp filed Critical Ramtron International Corp
Publication of DE69425366D1 publication Critical patent/DE69425366D1/de
Application granted granted Critical
Publication of DE69425366T2 publication Critical patent/DE69425366T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related 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
DE69425366T 1994-03-18 1994-12-09 System und Verfahren zur Schreibschutz bestimmter Teile eines Speicherarrays Expired - Fee Related DE69425366T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US08/210,699 US5394367A (en) 1994-03-18 1994-03-18 System and method for write-protecting predetermined portions of a memory array

Publications (2)

Publication Number Publication Date
DE69425366D1 true DE69425366D1 (de) 2000-08-31
DE69425366T2 DE69425366T2 (de) 2000-12-07

Family

ID=22783915

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69425366T Expired - Fee Related DE69425366T2 (de) 1994-03-18 1994-12-09 System und Verfahren zur Schreibschutz bestimmter Teile eines Speicherarrays

Country Status (4)

Country Link
US (1) US5394367A (de)
EP (1) EP0674318B1 (de)
JP (1) JP2943847B2 (de)
DE (1) DE69425366T2 (de)

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US6073243A (en) * 1997-02-03 2000-06-06 Intel Corporation Block locking and passcode scheme for flash memory
US5954818A (en) * 1997-02-03 1999-09-21 Intel Corporation Method of programming, erasing, and reading block lock-bits and a master lock-bit in a flash memory device
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FR2788875B1 (fr) * 1999-01-22 2001-03-30 Commissariat Energie Atomique Dispositif et procede de test d'une memoire non-volatile reprogrammable
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JP3602984B2 (ja) * 1999-07-09 2004-12-15 富士通株式会社 メモリ装置
US7259654B2 (en) * 2000-02-28 2007-08-21 Magellan Technology Pty Limited Radio frequency identification transponder
US7248145B2 (en) * 2000-02-28 2007-07-24 Magellan Technology Oty Limited Radio frequency identification transponder
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US7596073B2 (en) 2005-05-09 2009-09-29 Searete Llc Method and system for fluid mediated disk activation and deactivation
US7694316B2 (en) * 2005-05-09 2010-04-06 The Invention Science Fund I, Llc Fluid mediated disk activation and deactivation mechanisms
US7907486B2 (en) * 2006-06-20 2011-03-15 The Invention Science Fund I, Llc Rotation responsive disk activation and deactivation mechanisms
US7916592B2 (en) 2005-05-09 2011-03-29 The Invention Science Fund I, Llc Fluid mediated disk activation and deactivation mechanisms
US8159925B2 (en) * 2005-08-05 2012-04-17 The Invention Science Fund I, Llc Limited use memory device with associated information
US8218262B2 (en) 2005-05-09 2012-07-10 The Invention Science Fund I, Llc Method of manufacturing a limited use data storing device including structured data and primary and secondary read-support information
US8220014B2 (en) * 2005-05-09 2012-07-10 The Invention Science Fund I, Llc Modifiable memory devices having limited expected lifetime
US20110181981A1 (en) * 2005-05-09 2011-07-28 Searete Llc, A Limited Liability Corporation Of The State Of Delaware Method and system for rotational control of data storage devices
US8099608B2 (en) * 2005-05-09 2012-01-17 The Invention Science Fund I, Llc Limited use data storing device
US7519980B2 (en) * 2005-05-09 2009-04-14 Searete Llc Fluid mediated disk activation and deactivation mechanisms
US7512959B2 (en) * 2005-05-09 2009-03-31 Searete Llc Rotation responsive disk activation and deactivation mechanisms
US8462605B2 (en) 2005-05-09 2013-06-11 The Invention Science Fund I, Llc Method of manufacturing a limited use data storing device
US7916615B2 (en) * 2005-06-09 2011-03-29 The Invention Science Fund I, Llc Method and system for rotational control of data storage devices
US7770028B2 (en) * 2005-09-09 2010-08-03 Invention Science Fund 1, Llc Limited use data storing device
US7565596B2 (en) * 2005-09-09 2009-07-21 Searete Llc Data recovery systems
US7748012B2 (en) * 2005-05-09 2010-06-29 Searete Llc Method of manufacturing a limited use data storing device
US7668069B2 (en) * 2005-05-09 2010-02-23 Searete Llc Limited use memory device with associated information
US8121016B2 (en) * 2005-05-09 2012-02-21 The Invention Science Fund I, Llc Rotation responsive disk activation and deactivation mechanisms
US9396752B2 (en) * 2005-08-05 2016-07-19 Searete Llc Memory device activation and deactivation
CN100471680C (zh) * 2005-07-28 2009-03-25 深圳市博思得通信发展有限公司 Rfid标签打印系统和方法
GB0525635D0 (en) 2005-12-16 2006-01-25 Innovision Res & Tech Plc Chip card and method of data communication
US8264928B2 (en) * 2006-06-19 2012-09-11 The Invention Science Fund I, Llc Method and system for fluid mediated disk activation and deactivation
US8432777B2 (en) * 2006-06-19 2013-04-30 The Invention Science Fund I, Llc Method and system for fluid mediated disk activation and deactivation
US8122307B1 (en) 2006-08-15 2012-02-21 Synopsys, Inc. One time programmable memory test structures and methods
US8044774B1 (en) * 2006-10-24 2011-10-25 Impinj, Inc. RFID tag chips and tags able to be partially killed and methods
US8228175B1 (en) * 2008-04-07 2012-07-24 Impinj, Inc. RFID tag chips and tags with alternative behaviors and methods
GB2444798B (en) * 2006-12-15 2010-06-30 Innovision Res & Tech Plc Communications devices comprising near field RF communicators
US7953987B2 (en) * 2007-03-06 2011-05-31 International Business Machines Corporation Protection of secure electronic modules against attacks
US8115597B1 (en) 2007-03-07 2012-02-14 Impinj, Inc. RFID tags with synchronous power rectifier
US8044801B1 (en) 2007-03-07 2011-10-25 Impinj, Inc. RFID tag with double-switch rectifier
US7894261B1 (en) 2008-05-22 2011-02-22 Synopsys, Inc. PFET nonvolatile memory
US8518791B2 (en) 2011-08-12 2013-08-27 Cypress Semiconductor Corporation Method for fabricating a damascene self-aligned ferroelectric random access memory (F-RAM) with simultaneous formation of sidewall ferroelectric capacitors
US8552515B2 (en) 2011-08-12 2013-10-08 Cypress Semiconductor Corporation Method for fabricating a damascene self-aligned ferroelectric random access memory (F-RAM) device structure employing reduced processing steps
US8518792B2 (en) 2011-08-12 2013-08-27 Cypress Semiconductor Corporation Method for fabricating a damascene self-aligned ferroelectric random access memory (F-RAM) having a ferroelectric capacitor aligned with a three dimensional transistor structure
FR2990785B1 (fr) * 2012-05-21 2014-05-02 Schneider Electric Ind Sas Systeme d'echange de donnees
US10095889B2 (en) * 2016-03-04 2018-10-09 Altera Corporation Techniques for protecting security features of integrated circuits
US10296738B2 (en) * 2017-05-03 2019-05-21 Nuvoton Technology Corporation Secure integrated-circuit state management
US11263332B2 (en) 2018-07-31 2022-03-01 International Business Machines Corporation Methods to discourage unauthorized register access
CN110147333B (zh) * 2019-04-19 2021-09-28 宜鼎国际股份有限公司 写入保护电路

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FR2401459A1 (fr) * 1977-08-26 1979-03-23 Cii Honeywell Bull Support d'information portatif muni d'un microprocesseur et d'une memoire morte programmable
JPS58130490A (ja) * 1982-01-29 1983-08-03 Nec Corp 不揮発性ランダム・アクセス・メモリのストア制御回路
US4887239A (en) * 1985-03-04 1989-12-12 Lattice Semiconductor Corporation One-time programmable data security system for programmable logic device
DE3514430A1 (de) * 1985-04-20 1986-10-23 Sartorius GmbH, 3400 Göttingen Verfahren zum abspeichern von daten in einem elektrisch loeschbaren speicher und elektrisch loeschbarer speicher zur durchfuehrung des verfahrens
US4783745A (en) * 1986-01-30 1988-11-08 Pitney Bowes Inc. Nonvolatile memory unlock for an electronic postage meter
JP3025502B2 (ja) * 1987-03-16 2000-03-27 日立マクセル株式会社 半導体メモリ装置
US4796235A (en) * 1987-07-22 1989-01-03 Motorola, Inc. Write protect mechanism for non-volatile memory
JPS6472228A (en) * 1987-09-14 1989-03-17 Hitachi Maxell Semiconductor file storage device
US5144314A (en) * 1987-10-23 1992-09-01 Allen-Bradley Company, Inc. Programmable object identification transponder system
US4975870A (en) * 1988-02-25 1990-12-04 Data General Corporation Apparatus for locking a portion of a computer memory
US5163141A (en) * 1988-08-01 1992-11-10 Stenograph Corporation RAM lock device and method for a text entry system
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
US5293610A (en) * 1989-08-04 1994-03-08 Motorola, Inc. Memory system having two-level security system for enhanced protection against unauthorized access

Also Published As

Publication number Publication date
EP0674318B1 (de) 2000-07-26
JP2943847B2 (ja) 1999-08-30
US5394367A (en) 1995-02-28
EP0674318A1 (de) 1995-09-27
JPH086860A (ja) 1996-01-12
DE69425366T2 (de) 2000-12-07

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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