DE3784664D1 - Schutzvorrichtung fuer einen loesch- und neuprogrammierbaren festwertspeicher. - Google Patents

Schutzvorrichtung fuer einen loesch- und neuprogrammierbaren festwertspeicher.

Info

Publication number
DE3784664D1
DE3784664D1 DE8787402858T DE3784664T DE3784664D1 DE 3784664 D1 DE3784664 D1 DE 3784664D1 DE 8787402858 T DE8787402858 T DE 8787402858T DE 3784664 T DE3784664 T DE 3784664T DE 3784664 D1 DE3784664 D1 DE 3784664D1
Authority
DE
Germany
Prior art keywords
delete
protective device
fixed value
value memory
programmable fixed
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
DE8787402858T
Other languages
English (en)
Other versions
DE3784664T2 (de
Inventor
Augustin Farrugia
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.)
STMicroelectronics SA
Original Assignee
SGS Thomson Microelectronics SA
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=9342120&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=DE3784664(D1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by SGS Thomson Microelectronics SA filed Critical SGS Thomson Microelectronics SA
Application granted granted Critical
Publication of DE3784664D1 publication Critical patent/DE3784664D1/de
Publication of DE3784664T2 publication Critical patent/DE3784664T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • G06F12/1416—Protection against unauthorised use of memory or access to memory by checking the object accessibility, e.g. type of access defined by the memory independently of subject rights
    • G06F12/1425—Protection against unauthorised use of memory or access to memory by checking the object accessibility, e.g. type of access defined by the memory independently of subject rights the protection being physical, e.g. cell, word, block
    • G06F12/1433—Protection against unauthorised use of memory or access to memory by checking the object accessibility, e.g. type of access defined by the memory independently of subject rights the protection being physical, e.g. cell, word, block for a module or a part of a module
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C8/00—Arrangements for selecting an address in a digital store
    • G11C8/20—Address safety or protection circuits, i.e. arrangements for preventing unauthorized or accidental access
DE8787402858T 1986-12-19 1987-12-15 Schutzvorrichtung fuer einen loesch- und neuprogrammierbaren festwertspeicher. Expired - Fee Related DE3784664T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8617887A FR2608803B1 (fr) 1986-12-19 1986-12-19 Dispositif de protection d'une memoire morte effacable et reprogrammable

Publications (2)

Publication Number Publication Date
DE3784664D1 true DE3784664D1 (de) 1993-04-15
DE3784664T2 DE3784664T2 (de) 1993-06-17

Family

ID=9342120

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8787402858T Expired - Fee Related DE3784664T2 (de) 1986-12-19 1987-12-15 Schutzvorrichtung fuer einen loesch- und neuprogrammierbaren festwertspeicher.

Country Status (5)

Country Link
US (1) US4849942A (de)
EP (1) EP0272977B1 (de)
JP (2) JP3073748B2 (de)
DE (1) DE3784664T2 (de)
FR (1) FR2608803B1 (de)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4931997A (en) * 1987-03-16 1990-06-05 Hitachi Ltd. Semiconductor memory having storage buffer to save control data during bulk erase
JPH0683228B2 (ja) * 1988-07-29 1994-10-19 ホーチキ株式会社 防災監視装置
US5293610A (en) * 1989-08-04 1994-03-08 Motorola, Inc. Memory system having two-level security system for enhanced protection against unauthorized access
CA2097308A1 (en) * 1991-10-01 1993-04-02 Terrie Frane Memory write protection method and apparatus
GB2318228B (en) * 1996-10-09 2000-08-09 Ericsson Telefon Ab L M Trimming circuit
FR2756410B1 (fr) * 1996-11-28 1999-01-15 Sgs Thomson Microelectronics Dispositif de protection apres une ecriture de page d'une memoire electriquement programmable
US6184928B1 (en) 1997-04-30 2001-02-06 Eastman Kodak Company Method and apparatus for split shift register addressing
DE19835609C2 (de) * 1998-08-06 2000-06-08 Siemens Ag Programmgesteuerte Einheit
US6837425B2 (en) 2002-09-13 2005-01-04 Visa U.S.A. Inc. Compact protocol and solution for substantially offline messaging between portable consumer device and based device
DE102004046744B4 (de) 2004-09-27 2007-05-24 Atotech Deutschland Gmbh Verfahren zur Übertragung von Pulvern und Pulverlacken auf Substrate und Verwendung zur Herstellung von Leiterplatten und Solarzellen

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2471004B1 (fr) * 1979-11-30 1985-09-13 Dassault Electronique Installation et dispositif de controle de l'acces a une memoire electronique
US4651323A (en) * 1983-11-14 1987-03-17 Tandem Computers Incorporated Fault protection flip flop
JPS60140449A (ja) * 1983-12-27 1985-07-25 Fujitsu Ltd メモリ保護方式
JPS61101856A (ja) * 1984-10-24 1986-05-20 Nec Ic Microcomput Syst Ltd 記憶装置

Also Published As

Publication number Publication date
US4849942A (en) 1989-07-18
FR2608803B1 (fr) 1991-10-25
JPS63165934A (ja) 1988-07-09
EP0272977A1 (de) 1988-06-29
JP3073748B2 (ja) 2000-08-07
DE3784664T2 (de) 1993-06-17
JP2000231515A (ja) 2000-08-22
EP0272977B1 (de) 1993-03-10
FR2608803A1 (fr) 1988-06-24

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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