JPS5555499A - Memory control unit - Google Patents

Memory control unit

Info

Publication number
JPS5555499A
JPS5555499A JP12760978A JP12760978A JPS5555499A JP S5555499 A JPS5555499 A JP S5555499A JP 12760978 A JP12760978 A JP 12760978A JP 12760978 A JP12760978 A JP 12760978A JP S5555499 A JPS5555499 A JP S5555499A
Authority
JP
Japan
Prior art keywords
data
error correction
circuit
error
correction code
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
JP12760978A
Other languages
Japanese (ja)
Other versions
JPS6129024B2 (en
Inventor
Hiroyuki Nishimura
Original Assignee
Nec 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 Nec Corp filed Critical Nec Corp
Priority to JP53127609A priority Critical patent/JPS6129024B2/ja
Publication of JPS5555499A publication Critical patent/JPS5555499A/en
Publication of JPS6129024B2 publication Critical patent/JPS6129024B2/ja
Expired legal-status Critical Current

Links

Abstract

PURPOSE: To rewrite data without lengthening the processing cycle by storing data with error correction code after error correction into a register and utilizing a non- access period to write data on error addresses.
CONSTITUTION: Data with error correction code is read out from memory units M1..., which are designated by address register 13 and selection circuit 16, and is sent to error detection correction circuit 17; and when uncorrectable errors are detected, circuit 17 corrects them, and corrected data with error correction code is stored in designated one of registers R1.... This corrected data word is rewritten into units M1... by write command circuit 22 at the timing when selector 16 does not designate addresses. As a result, data can be rewritten without lengthening the processing cycle.
COPYRIGHT: (C)1980,JPO&Japio
JP53127609A 1978-10-16 1978-10-16 Expired JPS6129024B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP53127609A JPS6129024B2 (en) 1978-10-16 1978-10-16

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP53127609A JPS6129024B2 (en) 1978-10-16 1978-10-16

Publications (2)

Publication Number Publication Date
JPS5555499A true JPS5555499A (en) 1980-04-23
JPS6129024B2 JPS6129024B2 (en) 1986-07-03

Family

ID=14964310

Family Applications (1)

Application Number Title Priority Date Filing Date
JP53127609A Expired JPS6129024B2 (en) 1978-10-16 1978-10-16

Country Status (1)

Country Link
JP (1) JPS6129024B2 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62260251A (en) * 1986-05-07 1987-11-12 Mitsubishi Electric Corp Main memory controller
JPH02202655A (en) * 1989-01-31 1990-08-10 Nec Corp Storage device
EP0775343A1 (en) * 1994-05-24 1997-05-28 Intel Corporation Method and apparatus for automatically scrubbing ecc errors in memory via hardware
WO2003042826A2 (en) * 2001-11-14 2003-05-22 Monolithic System Technology, Inc Error correcting memory and method of operating same
FR2879337A1 (en) * 2004-12-15 2006-06-16 St Microelectronics Sa Memory circuit e.g. dynamic RAM or static RAM, for use in industrial application, has data buses that respectively serves to read and write memory modules, and address buses connected to inputs of multiplexers
US7275200B2 (en) 2004-11-23 2007-09-25 Monolithic System Technology, Inc. Transparent error correcting memory that supports partial-word write
JP2014186664A (en) * 2013-03-25 2014-10-02 Toshiba Corp Arithmetic unit and error processing method

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4996639A (en) * 1973-01-17 1974-09-12

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4996639A (en) * 1973-01-17 1974-09-12

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62260251A (en) * 1986-05-07 1987-11-12 Mitsubishi Electric Corp Main memory controller
JPH02202655A (en) * 1989-01-31 1990-08-10 Nec Corp Storage device
EP0775343A1 (en) * 1994-05-24 1997-05-28 Intel Corporation Method and apparatus for automatically scrubbing ecc errors in memory via hardware
EP0775343A4 (en) * 1994-05-24 1997-10-22 Intel Corp Method and apparatus for automatically scrubbing ecc errors in memory via hardware
WO2003042826A2 (en) * 2001-11-14 2003-05-22 Monolithic System Technology, Inc Error correcting memory and method of operating same
WO2003042826A3 (en) * 2001-11-14 2004-04-22 Monolithic System Tech Inc Error correcting memory and method of operating same
US7353438B2 (en) 2001-11-14 2008-04-01 Mosys, Inc. Transparent error correcting memory
US7051264B2 (en) 2001-11-14 2006-05-23 Monolithic System Technology, Inc. Error correcting memory and method of operating same
US7275200B2 (en) 2004-11-23 2007-09-25 Monolithic System Technology, Inc. Transparent error correcting memory that supports partial-word write
US7392456B2 (en) 2004-11-23 2008-06-24 Mosys, Inc. Predictive error correction code generation facilitating high-speed byte-write in a semiconductor memory
FR2879337A1 (en) * 2004-12-15 2006-06-16 St Microelectronics Sa Memory circuit e.g. dynamic RAM or static RAM, for use in industrial application, has data buses that respectively serves to read and write memory modules, and address buses connected to inputs of multiplexers
US7549109B2 (en) 2004-12-15 2009-06-16 Stmicroelectronics Sa Memory circuit, such as a DRAM, comprising an error correcting mechanism
JP2014186664A (en) * 2013-03-25 2014-10-02 Toshiba Corp Arithmetic unit and error processing method

Also Published As

Publication number Publication date
JPS6129024B2 (en) 1986-07-03

Similar Documents

Publication Publication Date Title
JPS5555499A (en) Memory control unit
JPS5797151A (en) Instruction storage device
JPS5644946A (en) Code error correction and detection system
JPS55101199A (en) Memory refresh unit
JPS54157045A (en) Memory unit
JPS5452936A (en) Memroy processor
JPS57169857A (en) Control storage device
JPS5690349A (en) Error correction code circuit
JPS5532110A (en) Check circuit for error correcting circuit
JPS6155744A (en) Recovery processing of errors
JPH04115340A (en) Duplex storage circuit
JPH04117529A (en) Microprogram controller
JPH0229839A (en) Microprogram control device
JPS5694592A (en) Data processor
JPH0317761A (en) Main storage
JPH02123428A (en) Microprogram control circuit
JPH04125753A (en) On-lined diagnostic system for memory
JPH03105444A (en) Memory address control circuit
JPH01133147A (en) Data processor
JPS63271555A (en) Storage control system
JPH0383300A (en) Semiconductor memory
JPS5823399A (en) Main storage device
JPS62212854A (en) Automatic error correcting memory device
JPS5542354A (en) Diagnostic system for memory unit
JPH0434632A (en) Memory system