JPS55157199A - Data protecting unit for power failure - Google Patents

Data protecting unit for power failure

Info

Publication number
JPS55157199A
JPS55157199A JP6366579A JP6366579A JPS55157199A JP S55157199 A JPS55157199 A JP S55157199A JP 6366579 A JP6366579 A JP 6366579A JP 6366579 A JP6366579 A JP 6366579A JP S55157199 A JPS55157199 A JP S55157199A
Authority
JP
Japan
Prior art keywords
check character
power failure
memory
nonvolatile
write
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
JP6366579A
Other languages
Japanese (ja)
Other versions
JPS6218945B2 (en
Inventor
Susumu Yokoe
Katsuhiko Miyagawa
Kazutoyo Hirozawa
Yoshiaki Hasegawa
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP6366579A priority Critical patent/JPS55157199A/en
Publication of JPS55157199A publication Critical patent/JPS55157199A/en
Publication of JPS6218945B2 publication Critical patent/JPS6218945B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Read Only Memory (AREA)
  • Non-Volatile Memory (AREA)
  • For Increasing The Reliability Of Semiconductor Memories (AREA)
  • Power Sources (AREA)
  • Static Random-Access Memory (AREA)
  • Techniques For Improving Reliability Of Storages (AREA)
  • Memory System (AREA)

Abstract

PURPOSE: To detect surely and rapidly errors dependent upon information destruction of a nonvolatile memory, by comparing a check character, which is stored in the memory, and the check character from a check character generator with each other just before erasing of the nonvolatile RAM for power failure.
CONSTITUTION: When an erasing signal is generated according to power failure occurrence, write contents of nonvolatile RAM14 are sent to a volatile RAM of high-speed read/write and are erased. Just before this erasing, the check character output by check character generator 15 for the information write into RAM14 through the volatile RAM is compared with the check character, which is stored in the check character area of the memory, in comparator 16. On a basis of this comparison result, errors dependent upon information destruction of the nonvolatile memory for power failure can be detected rapidly and surely.
COPYRIGHT: (C)1980,JPO&Japio
JP6366579A 1979-05-23 1979-05-23 Data protecting unit for power failure Granted JPS55157199A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6366579A JPS55157199A (en) 1979-05-23 1979-05-23 Data protecting unit for power failure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6366579A JPS55157199A (en) 1979-05-23 1979-05-23 Data protecting unit for power failure

Publications (2)

Publication Number Publication Date
JPS55157199A true JPS55157199A (en) 1980-12-06
JPS6218945B2 JPS6218945B2 (en) 1987-04-25

Family

ID=13235859

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6366579A Granted JPS55157199A (en) 1979-05-23 1979-05-23 Data protecting unit for power failure

Country Status (1)

Country Link
JP (1) JPS55157199A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58174730U (en) * 1982-05-14 1983-11-22 富士電機株式会社 Vending machine control device
JPS6372644U (en) * 1986-10-24 1988-05-16
JP2001079248A (en) * 1999-09-16 2001-03-27 Okumura Yu-Ki Co Ltd Pachinko machine

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58174730U (en) * 1982-05-14 1983-11-22 富士電機株式会社 Vending machine control device
JPS6372644U (en) * 1986-10-24 1988-05-16
JP2001079248A (en) * 1999-09-16 2001-03-27 Okumura Yu-Ki Co Ltd Pachinko machine

Also Published As

Publication number Publication date
JPS6218945B2 (en) 1987-04-25

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