JPH03263148A - Storage device - Google Patents

Storage device

Info

Publication number
JPH03263148A
JPH03263148A JP2063020A JP6302090A JPH03263148A JP H03263148 A JPH03263148 A JP H03263148A JP 2063020 A JP2063020 A JP 2063020A JP 6302090 A JP6302090 A JP 6302090A JP H03263148 A JPH03263148 A JP H03263148A
Authority
JP
Japan
Prior art keywords
storage
data
bit cell
inspection bit
inspection
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
JP2063020A
Other languages
Japanese (ja)
Other versions
JP2647989B2 (en
Inventor
Tei Shibuya
Yukihiro Nishiguchi
Original Assignee
Nec Ic Microcomput Syst 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 Nec Ic Microcomput Syst Ltd filed Critical Nec Ic Microcomput Syst Ltd
Priority to JP2063020A priority Critical patent/JP2647989B2/en
Publication of JPH03263148A publication Critical patent/JPH03263148A/en
Application granted granted Critical
Publication of JP2647989B2 publication Critical patent/JP2647989B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Abstract

PURPOSE: To efficiently use a storage area of a storage part by using an inspection bit cell part, as well, as a data bit cell at the time of an error correction unnecessary mode.
CONSTITUTION: At the time of an error correcting operation mode, in the same way as conventionally, an inspection bit is written in an inspection bit cell part 12 of a storage part 1, and with respect to data of plural units read out simultaneously from a data bit cell part 11 of the storage part 1, an error correction is executed by the inspection bit and it is outputted. Also, at the time of an error correction unnecessary mode, an address of the inspection bit cell part 12 is designated and in the address cell part 12 of this system, as well, regular data is written, and also, the written data is read out. According ly, in the case of being used in a field which does not necessitate an error correcting function, the inspection bit cell part 12 can also be used for write and read-out of regular data. In such a way, a storage area of the storage part 1 can be used efficiently.
COPYRIGHT: (C)1991,JPO&Japio
JP2063020A 1990-03-13 1990-03-13 Storage device Expired - Lifetime JP2647989B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2063020A JP2647989B2 (en) 1990-03-13 1990-03-13 Storage device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2063020A JP2647989B2 (en) 1990-03-13 1990-03-13 Storage device

Publications (2)

Publication Number Publication Date
JPH03263148A true JPH03263148A (en) 1991-11-22
JP2647989B2 JP2647989B2 (en) 1997-08-27

Family

ID=13217224

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2063020A Expired - Lifetime JP2647989B2 (en) 1990-03-13 1990-03-13 Storage device

Country Status (1)

Country Link
JP (1) JP2647989B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07302226A (en) * 1994-05-02 1995-11-14 Nec Corp Memory illegal access detection circuit
JP2008084052A (en) * 2006-09-28 2008-04-10 Nec Electronics Corp Semiconductor memory device
JP2010086523A (en) * 2008-10-01 2010-04-15 Samsung Electronics Co Ltd Secure memory interface

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5853092A (en) * 1981-09-22 1983-03-29 Fujitsu Ltd Parity bit generating system
JPS63153655A (en) * 1986-12-17 1988-06-27 Fujitsu Ltd Memory access control system
JPH01209552A (en) * 1988-02-17 1989-08-23 Hitachi Maxell Ltd Semiconductor file memory device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5853092A (en) * 1981-09-22 1983-03-29 Fujitsu Ltd Parity bit generating system
JPS63153655A (en) * 1986-12-17 1988-06-27 Fujitsu Ltd Memory access control system
JPH01209552A (en) * 1988-02-17 1989-08-23 Hitachi Maxell Ltd Semiconductor file memory device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07302226A (en) * 1994-05-02 1995-11-14 Nec Corp Memory illegal access detection circuit
JP2008084052A (en) * 2006-09-28 2008-04-10 Nec Electronics Corp Semiconductor memory device
JP2010086523A (en) * 2008-10-01 2010-04-15 Samsung Electronics Co Ltd Secure memory interface

Also Published As

Publication number Publication date
JP2647989B2 (en) 1997-08-27

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