JPS558630A - Clock control system - Google Patents

Clock control system

Info

Publication number
JPS558630A
JPS558630A JP7960378A JP7960378A JPS558630A JP S558630 A JPS558630 A JP S558630A JP 7960378 A JP7960378 A JP 7960378A JP 7960378 A JP7960378 A JP 7960378A JP S558630 A JPS558630 A JP S558630A
Authority
JP
Japan
Prior art keywords
clocks
memory
supply
system clock
counter
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
JP7960378A
Other languages
Japanese (ja)
Inventor
Masao Takahashi
Motozo Nagano
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP7960378A priority Critical patent/JPS558630A/en
Publication of JPS558630A publication Critical patent/JPS558630A/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)
  • For Increasing The Reliability Of Semiconductor Memories (AREA)

Abstract

PURPOSE:To generate always the same phenomenon under the same state by keeping always a fixed relation between refreshing clocks, which determine the refresh timing, and system clocks. CONSTITUTION:Counters 5 and 4 to determine the refresh timing of dynamic MOS memory 1 are provided in the memory 1 side and the memory control unit 2 side respectively and this system is so constituted that continuous clocks can be supplied to these counters even in the interrupt time of system clocks. In case that the supply of system clocks is started after system clock stop, system clock control circuit 9 does not start the system clock supply operation immediately, but starts the supply of system clocks when coincidence circuit 8 detects that the value of counter 6' operated by free-running clocks agrees with the value of counter 6 operated by gated clocks.
JP7960378A 1978-06-30 1978-06-30 Clock control system Pending JPS558630A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7960378A JPS558630A (en) 1978-06-30 1978-06-30 Clock control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7960378A JPS558630A (en) 1978-06-30 1978-06-30 Clock control system

Publications (1)

Publication Number Publication Date
JPS558630A true JPS558630A (en) 1980-01-22

Family

ID=13694582

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7960378A Pending JPS558630A (en) 1978-06-30 1978-06-30 Clock control system

Country Status (1)

Country Link
JP (1) JPS558630A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57109186A (en) * 1980-12-25 1982-07-07 Fujitsu Ltd Refresh synchronism system
JPS5911423A (en) * 1982-07-13 1984-01-21 Fujitsu Ltd System clock controlling system
JPS605499A (en) * 1983-06-23 1985-01-12 Fujitsu Ltd Resetting system of register file
JPS60194163A (en) * 1984-03-12 1985-10-02 株式会社山東鉄工所 Batch type liquid treatment apparatus

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57109186A (en) * 1980-12-25 1982-07-07 Fujitsu Ltd Refresh synchronism system
JPH038036B2 (en) * 1980-12-25 1991-02-05 Fujitsu Ltd
JPS5911423A (en) * 1982-07-13 1984-01-21 Fujitsu Ltd System clock controlling system
JPS605499A (en) * 1983-06-23 1985-01-12 Fujitsu Ltd Resetting system of register file
JPH0474799B2 (en) * 1983-06-23 1992-11-27
JPS60194163A (en) * 1984-03-12 1985-10-02 株式会社山東鉄工所 Batch type liquid treatment apparatus
JPS6262179B2 (en) * 1984-03-12 1987-12-25 Sando Iron Works Co

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