JPS61278951A - 記憶情報保護回路 - Google Patents

記憶情報保護回路

Info

Publication number
JPS61278951A
JPS61278951A JP60122907A JP12290785A JPS61278951A JP S61278951 A JPS61278951 A JP S61278951A JP 60122907 A JP60122907 A JP 60122907A JP 12290785 A JP12290785 A JP 12290785A JP S61278951 A JPS61278951 A JP S61278951A
Authority
JP
Japan
Prior art keywords
data
register
code
read
eprom
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.)
Granted
Application number
JP60122907A
Other languages
English (en)
Japanese (ja)
Other versions
JPH037981B2 (enExample
Inventor
Kingo Wakimoto
脇本　欣吾
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP60122907A priority Critical patent/JPS61278951A/ja
Publication of JPS61278951A publication Critical patent/JPS61278951A/ja
Publication of JPH037981B2 publication Critical patent/JPH037981B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Storage Device Security (AREA)
JP60122907A 1985-06-04 1985-06-04 記憶情報保護回路 Granted JPS61278951A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP60122907A JPS61278951A (ja) 1985-06-04 1985-06-04 記憶情報保護回路

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP60122907A JPS61278951A (ja) 1985-06-04 1985-06-04 記憶情報保護回路

Publications (2)

Publication Number Publication Date
JPS61278951A true JPS61278951A (ja) 1986-12-09
JPH037981B2 JPH037981B2 (enExample) 1991-02-04

Family

ID=14847561

Family Applications (1)

Application Number Title Priority Date Filing Date
JP60122907A Granted JPS61278951A (ja) 1985-06-04 1985-06-04 記憶情報保護回路

Country Status (1)

Country Link
JP (1) JPS61278951A (enExample)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6278643A (ja) * 1985-10-02 1987-04-10 Hitachi Ltd 半導体集積回路
JPS6441048A (en) * 1987-08-05 1989-02-13 Nec Corp Nonvolatile semiconductor memory
JPS6462746A (en) * 1987-09-02 1989-03-09 Nec Corp Eprom with program verity inhibiting function
JPH01201752A (ja) * 1988-02-05 1989-08-14 Nec Corp マイクロコンピュータ
JPH0245850A (ja) * 1988-08-08 1990-02-15 Nec Corp 不揮発性半導体メモリ
JPH04256145A (ja) * 1991-02-08 1992-09-10 Sharp Corp 集積回路装置
JPH0520204A (ja) * 1991-07-11 1993-01-29 Matsushita Electric Ind Co Ltd 半導体装置
JPH05307507A (ja) * 1991-04-01 1993-11-19 Nec Corp 記憶装置

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6278643A (ja) * 1985-10-02 1987-04-10 Hitachi Ltd 半導体集積回路
JPS6441048A (en) * 1987-08-05 1989-02-13 Nec Corp Nonvolatile semiconductor memory
JPS6462746A (en) * 1987-09-02 1989-03-09 Nec Corp Eprom with program verity inhibiting function
JPH01201752A (ja) * 1988-02-05 1989-08-14 Nec Corp マイクロコンピュータ
JPH0245850A (ja) * 1988-08-08 1990-02-15 Nec Corp 不揮発性半導体メモリ
JPH04256145A (ja) * 1991-02-08 1992-09-10 Sharp Corp 集積回路装置
JPH05307507A (ja) * 1991-04-01 1993-11-19 Nec Corp 記憶装置
JPH0520204A (ja) * 1991-07-11 1993-01-29 Matsushita Electric Ind Co Ltd 半導体装置

Also Published As

Publication number Publication date
JPH037981B2 (enExample) 1991-02-04

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