HK72485A - Refresh circuit for dynamic memory of a data processor employing a direct memory access controller - Google Patents

Refresh circuit for dynamic memory of a data processor employing a direct memory access controller

Info

Publication number
HK72485A
HK72485A HK724/85A HK72485A HK72485A HK 72485 A HK72485 A HK 72485A HK 724/85 A HK724/85 A HK 724/85A HK 72485 A HK72485 A HK 72485A HK 72485 A HK72485 A HK 72485A
Authority
HK
Hong Kong
Prior art keywords
data processor
access controller
refresh circuit
processor employing
memory access
Prior art date
Application number
HK724/85A
Other languages
English (en)
Inventor
James A Brewer
Lewis C Eggebrecht
David A Kummer
Patricia P Mchugh
Original Assignee
Ibm
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 Ibm filed Critical Ibm
Publication of HK72485A publication Critical patent/HK72485A/xx

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F12/00—Accessing, addressing or allocating within memory systems or architectures
    • G06F12/02—Addressing or allocation; Relocation
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C11/00—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor
    • G11C11/21—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements
    • G11C11/34—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements using semiconductor devices
    • G11C11/40—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements using semiconductor devices using transistors
    • G11C11/401—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements using semiconductor devices using transistors forming cells needing refreshing or charge regeneration, i.e. dynamic cells
    • G11C11/406—Management or control of the refreshing or charge-regeneration cycles

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Computer Hardware Design (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Dram (AREA)
  • Bus Control (AREA)
HK724/85A 1981-08-12 1985-09-26 Refresh circuit for dynamic memory of a data processor employing a direct memory access controller HK72485A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/292,075 US4556952A (en) 1981-08-12 1981-08-12 Refresh circuit for dynamic memory of a data processor employing a direct memory access controller

Publications (1)

Publication Number Publication Date
HK72485A true HK72485A (en) 1985-10-04

Family

ID=23123091

Family Applications (1)

Application Number Title Priority Date Filing Date
HK724/85A HK72485A (en) 1981-08-12 1985-09-26 Refresh circuit for dynamic memory of a data processor employing a direct memory access controller

Country Status (9)

Country Link
US (1) US4556952A (de)
EP (1) EP0071743A3 (de)
JP (1) JPS5829197A (de)
KR (1) KR860000541B1 (de)
GB (1) GB2103850B (de)
HK (1) HK72485A (de)
MX (1) MX153198A (de)
MY (1) MY8600231A (de)
PH (1) PH24658A (de)

Families Citing this family (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4575826A (en) * 1984-02-27 1986-03-11 International Business Machines Corp. Refresh generator system for a dynamic memory
US4703420A (en) * 1985-02-28 1987-10-27 International Business Machines Corporation System for arbitrating use of I/O bus by co-processor and higher priority I/O units in which co-processor automatically request bus access in anticipation of need
CA1240066A (en) * 1985-08-15 1988-08-02 John R. Ramsay Dynamic memory refresh and parity checking circuit
JPS62188096A (ja) * 1986-02-13 1987-08-17 Toshiba Corp 半導体記憶装置のリフレツシユ動作タイミング制御回路
US4924441A (en) * 1987-03-18 1990-05-08 Hayes Microcomputer Products, Inc. Method and apparatus for refreshing a dynamic memory
US5241661A (en) * 1987-03-27 1993-08-31 International Business Machines Corporation DMA access arbitration device in which CPU can arbitrate on behalf of attachment having no arbiter
US4881205A (en) * 1987-04-21 1989-11-14 Casio Computer Co., Ltd. Compact electronic apparatus with a refresh unit for a dynamic type memory
JP2691560B2 (ja) * 1988-05-18 1997-12-17 京セラ株式会社 Ｄ−ｒａｍのリフレッシュ制御方式
US4987529A (en) * 1988-08-11 1991-01-22 Ast Research, Inc. Shared memory bus system for arbitrating access control among contending memory refresh circuits, peripheral controllers, and bus masters
US4965717A (en) * 1988-12-09 1990-10-23 Tandem Computers Incorporated Multiple processor system having shared memory with private-write capability
US5247655A (en) * 1989-11-07 1993-09-21 Chips And Technologies, Inc. Sleep mode refresh apparatus
JPH04229487A (ja) * 1990-06-19 1992-08-18 Dell Usa Corp ダイナミックｒａｍを含むメモリサブシステムのリフレッシュ動作制御システムを有するディジタルコンピュータ及びリフレッシュ動作制御方法
US5577214A (en) * 1992-05-18 1996-11-19 Opti, Inc. Programmable hold delay
TW390446U (en) * 1992-10-01 2000-05-11 Hudson Soft Co Ltd Information processing system
US5473770A (en) * 1993-03-02 1995-12-05 Tandem Computers Incorporated Fault-tolerant computer system with hidden local memory refresh
EP0855718A1 (de) * 1997-01-28 1998-07-29 Hewlett-Packard Company Speichersteuerung in niedrigem Verbrauchsmodus
US7089344B1 (en) * 2000-06-09 2006-08-08 Motorola, Inc. Integrated processor platform supporting wireless handheld multi-media devices
JP4598858B2 (ja) 2005-06-30 2010-12-15 フリースケール セミコンダクター インコーポレイテッド ダイレクトメモリアクセスタスク要求のアービトレーションを行うためのデバイスおよび方法
US20090125647A1 (en) * 2005-06-30 2009-05-14 Citibank, N.A. Device And Method For Executing A DMA Task
DE602005027003D1 (de) 2005-06-30 2011-04-28 Freescale Semiconductor Inc Einrichtung und verfahren zur steuerung einer ausführung einer dma-task
DE602005015632D1 (de) * 2005-06-30 2009-09-03 Freescale Semiconductor Inc Einrichtung und verfahren zur steuerung mehrerer dma-tasks
US7472292B2 (en) * 2005-10-03 2008-12-30 Hewlett-Packard Development Company, L.P. System and method for throttling memory power consumption based on status of cover switch of a computer system
US7159082B1 (en) * 2005-10-03 2007-01-02 Hewlett-Packard Development Company, L.P. System and method for throttling memory accesses
WO2007083197A1 (en) 2006-01-18 2007-07-26 Freescale Semiconductor Inc. Device having data sharing capabilities and a method for sharing data
KR100800384B1 (ko) * 2006-06-20 2008-02-01 삼성전자주식회사 반도체 메모리 장치 및 이에 따른 셀프 리프레쉬 방법
US10447461B2 (en) * 2015-12-01 2019-10-15 Infineon Technologies Austria Ag Accessing data via different clocks

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4142233A (en) 1975-10-30 1979-02-27 Tokyo Shibaura Electric Co., Ltd. Refreshing system for dynamic memory
JPS5255337A (en) * 1975-10-31 1977-05-06 Hitachi Ltd Refresh control system
US4137565A (en) * 1977-01-10 1979-01-30 Xerox Corporation Direct memory access module for a controller
US4218753A (en) * 1977-02-28 1980-08-19 Data General Corporation Microcode-controlled memory refresh apparatus for a data processing system
US4207618A (en) 1978-06-26 1980-06-10 Texas Instruments Incorporated On-chip refresh for dynamic memory
US4185323A (en) 1978-07-20 1980-01-22 Honeywell Information Systems Inc. Dynamic memory system which includes apparatus for performing refresh operations in parallel with normal memory operations
US4317169A (en) * 1979-02-14 1982-02-23 Honeywell Information Systems Inc. Data processing system having centralized memory refresh
JPS55139691A (en) 1979-04-11 1980-10-31 Matsushita Electric Ind Co Ltd Memory circuit control system

Also Published As

Publication number Publication date
JPS5829197A (ja) 1983-02-21
GB2103850A (en) 1983-02-23
PH24658A (en) 1990-09-07
MX153198A (es) 1986-08-21
EP0071743A3 (de) 1984-07-25
US4556952A (en) 1985-12-03
KR860000541B1 (ko) 1986-05-08
MY8600231A (en) 1986-12-31
EP0071743A2 (de) 1983-02-16
GB2103850B (en) 1985-03-20
KR840001369A (ko) 1984-04-30

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