JPS5651087A - Refresh control system - Google Patents

Refresh control system

Info

Publication number
JPS5651087A
JPS5651087A JP12706279A JP12706279A JPS5651087A JP S5651087 A JPS5651087 A JP S5651087A JP 12706279 A JP12706279 A JP 12706279A JP 12706279 A JP12706279 A JP 12706279A JP S5651087 A JPS5651087 A JP S5651087A
Authority
JP
Japan
Prior art keywords
memory cycle
refresh
cycle operation
refresh control
control system
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
JP12706279A
Other languages
Japanese (ja)
Inventor
Kiyoshi Iezuka
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.)
Casio Computer Co Ltd
Original Assignee
Casio Computer 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 Casio Computer Co Ltd filed Critical Casio Computer Co Ltd
Priority to JP12706279A priority Critical patent/JPS5651087A/en
Publication of JPS5651087A publication Critical patent/JPS5651087A/en
Pending legal-status Critical Current

Links

Classifications

    • 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)

Abstract

PURPOSE:To enable to refresh RAMs surely with a simple circuit constitution, by giving priority to the refresh operation according to the refresh request signal than the memory cycle operation. CONSTITUTION:When a refresh request signal is fed to a RAM system, a WAIT signal is fed to a CPU1 from a system 2. Thus, the memory cycle operation in the CPU1 is extended to gieven priority over the RAM of the system 2 than the memory cycle operation. Accordingly, the refresh control of RAMs can be ensured with a simple circuit constitution such as the stop of clock of memory cycle operation and whether or not in memory cycle.
JP12706279A 1979-10-02 1979-10-02 Refresh control system Pending JPS5651087A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12706279A JPS5651087A (en) 1979-10-02 1979-10-02 Refresh control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12706279A JPS5651087A (en) 1979-10-02 1979-10-02 Refresh control system

Publications (1)

Publication Number Publication Date
JPS5651087A true JPS5651087A (en) 1981-05-08

Family

ID=14950639

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12706279A Pending JPS5651087A (en) 1979-10-02 1979-10-02 Refresh control system

Country Status (1)

Country Link
JP (1) JPS5651087A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61115607U (en) * 1984-12-28 1986-07-22
JPH0253292A (en) * 1988-08-17 1990-02-22 Sharp Corp Dynamic memory
US4969055A (en) * 1984-10-10 1990-11-06 Oberjatzas Guenter Method for recording and/or reproducing digitally coded signals with interframe and interframe coding

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4991136A (en) * 1972-12-29 1974-08-30
JPS5391637A (en) * 1977-01-24 1978-08-11 Nec Corp Data processor

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4991136A (en) * 1972-12-29 1974-08-30
JPS5391637A (en) * 1977-01-24 1978-08-11 Nec Corp Data processor

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4969055A (en) * 1984-10-10 1990-11-06 Oberjatzas Guenter Method for recording and/or reproducing digitally coded signals with interframe and interframe coding
JPS61115607U (en) * 1984-12-28 1986-07-22
JPH0253292A (en) * 1988-08-17 1990-02-22 Sharp Corp Dynamic memory

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