DE69432245D1 - Mikrorechner mit Speicherleseschutz - Google Patents

Mikrorechner mit Speicherleseschutz

Info

Publication number
DE69432245D1
DE69432245D1 DE69432245T DE69432245T DE69432245D1 DE 69432245 D1 DE69432245 D1 DE 69432245D1 DE 69432245 T DE69432245 T DE 69432245T DE 69432245 T DE69432245 T DE 69432245T DE 69432245 D1 DE69432245 D1 DE 69432245D1
Authority
DE
Germany
Prior art keywords
microcomputer
memory read
read protection
protection
memory
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 - Lifetime
Application number
DE69432245T
Other languages
English (en)
Other versions
DE69432245T2 (de
Inventor
Moriyasu Banno
Tatsuo Inoue
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.)
Toshiba Corp
Original Assignee
Toshiba 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 Toshiba Corp filed Critical Toshiba Corp
Application granted granted Critical
Publication of DE69432245D1 publication Critical patent/DE69432245D1/de
Publication of DE69432245T2 publication Critical patent/DE69432245T2/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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
    • G06F12/1441—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 range
    • 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
    • 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
DE69432245T 1993-12-28 1994-12-27 Mikrorechner mit Speicherleseschutz Expired - Lifetime DE69432245T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP33499793 1993-12-28
JP33499793A JP3520102B2 (ja) 1993-12-28 1993-12-28 マイクロコンピュータ

Publications (2)

Publication Number Publication Date
DE69432245D1 true DE69432245D1 (de) 2003-04-17
DE69432245T2 DE69432245T2 (de) 2004-01-22

Family

ID=18283583

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69432245T Expired - Lifetime DE69432245T2 (de) 1993-12-28 1994-12-27 Mikrorechner mit Speicherleseschutz

Country Status (5)

Country Link
US (1) US5680581A (de)
EP (1) EP0661642B1 (de)
JP (1) JP3520102B2 (de)
KR (1) KR0138697B1 (de)
DE (1) DE69432245T2 (de)

Families Citing this family (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08305635A (ja) * 1995-05-01 1996-11-22 Nec Corp ワンチップｃｐｕ
JPH09146914A (ja) * 1995-09-06 1997-06-06 Seiko Epson Corp シングルチップマイクロコンピュータ及びそれを内蔵した電子機器
JPH09114743A (ja) * 1995-10-16 1997-05-02 Nec Corp シングルチップ・マイクロコンピュータ
US5903912A (en) * 1996-08-14 1999-05-11 Advanced Micro Devices, Inc. Microcontroller configured to convey data corresponding to internal memory accesses externally
US5860161A (en) * 1996-08-14 1999-01-12 Advanced Micro Devices, Inc. Microcontroller configured to indicate internal memory accesses externally
DE69738450T2 (de) * 1996-11-15 2009-01-08 Nxp B.V. Verfahren und Vorrichtung zur zeitlichen Nachführung eines Signals
JP3588529B2 (ja) * 1997-01-28 2004-11-10 株式会社東芝 半導体装置およびその応用システム装置
US5862148A (en) * 1997-02-11 1999-01-19 Advanced Micro Devices, Inc. Microcontroller with improved debug capability for internal memory
JPH10228421A (ja) * 1997-02-14 1998-08-25 Nec Ic Microcomput Syst Ltd メモリアクセス制御回路
AU1060999A (en) * 1997-09-16 1999-04-05 Information Resource Engineering, Inc. Cryptographic co-processor
US6049876A (en) * 1998-02-09 2000-04-11 Motorola, Inc. Data processing system and method which detect unauthorized memory accesses
FR2788353B1 (fr) * 1999-01-11 2001-02-23 St Microelectronics Sa Microprocesseur avec circuits de protection pour securiser l'acces a ses registres
JP2002014737A (ja) * 2000-06-29 2002-01-18 Fujitsu Ltd 処理装置、集積回路、および集積回路パッケージ
FR2814557B1 (fr) * 2000-09-27 2002-12-27 Gemplus Card Int Protection contre l'exploitation abusive d'une instruction dans une memoire
KR100396791B1 (ko) * 2000-10-18 2003-09-02 주식회사 하이닉스반도체 프로그램 메모리의 액세스장치
FR2823364B1 (fr) * 2001-04-05 2003-06-27 St Microelectronics Sa Dispositif et procede de protection partielle en lecture d'une memoire non volatile
DE10126281A1 (de) * 2001-05-29 2002-12-12 Infineon Technologies Ag Programmgesteuerte Einheit
KR100468615B1 (ko) * 2002-04-02 2005-01-31 매그나칩 반도체 유한회사 내부 프로그램 코드 보호 장치
JP4347582B2 (ja) * 2003-02-04 2009-10-21 パナソニック株式会社 情報処理装置
FR2857535A1 (fr) * 2003-07-09 2005-01-14 Atmel Corp Procede et systeme pour brouiller le contenu d'une cellule dans un circuit integre.
US7281103B2 (en) * 2003-10-01 2007-10-09 Kabushiki Kaisha Toshiba Microcomputer with a security function for accessing a program storage memory
US7574576B2 (en) * 2006-12-22 2009-08-11 Spansion Llc Semiconductor device and method of controlling the same
US7895404B2 (en) 2008-02-14 2011-02-22 Atmel Rousset S.A.S. Access rights on a memory map
US9514064B2 (en) 2012-08-15 2016-12-06 Synopsys, Inc. Protection scheme for embedded code
JP2021140555A (ja) * 2020-03-06 2021-09-16 本田技研工業株式会社 半導体装置とその制御方法

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4523271A (en) * 1982-06-22 1985-06-11 Levien Raphael L Software protection method and apparatus
US4590552A (en) * 1982-06-30 1986-05-20 Texas Instruments Incorporated Security bit for designating the security status of information stored in a nonvolatile memory
US4521853A (en) * 1982-06-30 1985-06-04 Texas Instruments Incorporated Secure microprocessor/microcomputer with secured memory
US4581702A (en) * 1983-01-10 1986-04-08 International Business Machines Corporation Critical system protection
JPS6068441A (ja) * 1983-09-22 1985-04-19 Fujitsu Ltd ワンチツプ・マイクロ・コンピユ−タ
US5347636A (en) * 1985-11-08 1994-09-13 Nec Corporation Data processor which efficiently accesses main memory and input/output devices
US5155829A (en) * 1986-01-21 1992-10-13 Harry M. Weiss Memory system and method for protecting the contents of a ROM type memory
JPS62204345A (ja) * 1986-03-05 1987-09-09 Oki Electric Ind Co Ltd マイクロコンピユ−タ
US5134700A (en) * 1987-09-18 1992-07-28 General Instrument Corporation Microcomputer with internal ram security during external program mode
FR2621409A1 (fr) * 1987-10-02 1989-04-07 Thomson Semiconducteurs Dispositif de protection des zones memoires d'un systeme electronique a microprocesseur
US5014191A (en) * 1988-05-02 1991-05-07 Padgaonkar Ajay J Security for digital signal processor program memory
US5251304A (en) * 1990-09-28 1993-10-05 Motorola, Inc. Integrated circuit microcontroller with on-chip memory and external bus interface and programmable mechanism for securing the contents of on-chip memory
DE69231077T2 (de) * 1991-03-06 2001-02-01 Nec Corp Einchipmikrorechner mit Schutzfuntion für den Inhalt eines internen ROM's
US5557743A (en) * 1994-04-05 1996-09-17 Motorola, Inc. Protection circuit for a microprocessor

Also Published As

Publication number Publication date
KR0138697B1 (ko) 1998-06-15
DE69432245T2 (de) 2004-01-22
JPH07200413A (ja) 1995-08-04
KR950020094A (ko) 1995-07-24
US5680581A (en) 1997-10-21
EP0661642A2 (de) 1995-07-05
EP0661642A3 (de) 1998-04-15
JP3520102B2 (ja) 2004-04-19
EP0661642B1 (de) 2003-03-12

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition