JPS56123023A - Power supply controlling system - Google Patents

Power supply controlling system

Info

Publication number
JPS56123023A
JPS56123023A JP2406580A JP2406580A JPS56123023A JP S56123023 A JPS56123023 A JP S56123023A JP 2406580 A JP2406580 A JP 2406580A JP 2406580 A JP2406580 A JP 2406580A JP S56123023 A JPS56123023 A JP S56123023A
Authority
JP
Japan
Prior art keywords
storage device
external storage
processor
signal
power
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
JP2406580A
Other languages
Japanese (ja)
Other versions
JPS5818643B2 (en
Inventor
Kazuhiko Uchiumi
Toshitaka Hara
Kiyoji Ono
Kazuhiro Koyama
Shigeo Kikuta
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP55024065A priority Critical patent/JPS5818643B2/en
Publication of JPS56123023A publication Critical patent/JPS56123023A/en
Publication of JPS5818643B2 publication Critical patent/JPS5818643B2/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/26—Power supply means, e.g. regulation thereof
    • G06F1/32—Means for saving power

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Power Sources (AREA)
  • Direct Current Feeding And Distribution (AREA)

Abstract

PURPOSE:To prevent the noise of the cooling fan motor and a waste of electric power when the external storage device is not used, by supplying power to the external storage device only when the processor uses the external storage device. CONSTITUTION:When power source 19 of processor 1 is made, power supply detecting circuit 5 detects DC voltage signal 7 to generate detection signal 23 on signal line 9. Processor 1 receives this detection signal to transmit the relay driving signal to relay controlling circuit 3 through signal line 13, and relay switch 4 is turned on to supply power to external storage device 2. If a medium is inserted into external storage device 2, control siganl 25 rises on control signal line 12, and processor 1 detects this signal to execute data transfer. If the medium is not inserted into external storage device 2, control signal 25 does not rise, and therefore, processor 1 sets external storage device 2 to the power supply state and is held for a prescribed time until device 2 becomes available.
JP55024065A 1980-02-29 1980-02-29 Power control method Expired JPS5818643B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55024065A JPS5818643B2 (en) 1980-02-29 1980-02-29 Power control method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55024065A JPS5818643B2 (en) 1980-02-29 1980-02-29 Power control method

Publications (2)

Publication Number Publication Date
JPS56123023A true JPS56123023A (en) 1981-09-26
JPS5818643B2 JPS5818643B2 (en) 1983-04-14

Family

ID=12128035

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55024065A Expired JPS5818643B2 (en) 1980-02-29 1980-02-29 Power control method

Country Status (1)

Country Link
JP (1) JPS5818643B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9007864B2 (en) 2010-03-16 2015-04-14 Panasonic Intellectual Property Management Co., Ltd. Information processing apparatus, nonvolatile storage device, information porcessing system and nonvolatile memory controller

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9007864B2 (en) 2010-03-16 2015-04-14 Panasonic Intellectual Property Management Co., Ltd. Information processing apparatus, nonvolatile storage device, information porcessing system and nonvolatile memory controller

Also Published As

Publication number Publication date
JPS5818643B2 (en) 1983-04-14

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