JPS56143595A - Digital protection controller - Google Patents

Digital protection controller

Info

Publication number
JPS56143595A
JPS56143595A JP4652280A JP4652280A JPS56143595A JP S56143595 A JPS56143595 A JP S56143595A JP 4652280 A JP4652280 A JP 4652280A JP 4652280 A JP4652280 A JP 4652280A JP S56143595 A JPS56143595 A JP S56143595A
Authority
JP
Japan
Prior art keywords
command
write
automatic check
address
signal
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.)
Pending
Application number
JP4652280A
Other languages
Japanese (ja)
Inventor
Ryotaro Kondo
Takao Fujisawa
Kyuichi Fujii
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
Tokyo Shibaura Electric Co Ltd
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, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP4652280A priority Critical patent/JPS56143595A/en
Publication of JPS56143595A publication Critical patent/JPS56143595A/en
Pending 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
    • G11C16/10—Programming or data input circuits

Abstract

PURPOSE:To refresh setting informtion in a nonvolatile memory periodically and automatically, by using the automatic check start command of an automatic check starter as the refreshment command of the nonvolatile memory. CONSTITUTION:Address setting part 4 sets address A, and data setting part 5 sets data B to set a setting value. When write-in signal S2 from write-in switch 6 or automatic check start signal S1 from an automatic check starting circuit is supplied periodically to control circuit 7, control circuit 7 outputs signal S3 varying in the order of 0, C, 0, -C, and 0 volt. Here, C corresponds to the erasure command, and -C the write-in command. Memory 2 erases information with the erasure command and writes data B in address A with the write-in command to refresh nonvolatile information.
JP4652280A 1980-04-09 1980-04-09 Digital protection controller Pending JPS56143595A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4652280A JPS56143595A (en) 1980-04-09 1980-04-09 Digital protection controller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4652280A JPS56143595A (en) 1980-04-09 1980-04-09 Digital protection controller

Publications (1)

Publication Number Publication Date
JPS56143595A true JPS56143595A (en) 1981-11-09

Family

ID=12749599

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4652280A Pending JPS56143595A (en) 1980-04-09 1980-04-09 Digital protection controller

Country Status (1)

Country Link
JP (1) JPS56143595A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6489099A (en) * 1987-09-30 1989-04-03 Toshiba Corp Restorage device
JPH01205792A (en) * 1988-02-12 1989-08-18 Yokogawa Electric Corp Content protecting device for eeprom

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6489099A (en) * 1987-09-30 1989-04-03 Toshiba Corp Restorage device
JPH01205792A (en) * 1988-02-12 1989-08-18 Yokogawa Electric Corp Content protecting device for eeprom

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