JPS5714905A - Digital input circuit - Google Patents

Digital input circuit

Info

Publication number
JPS5714905A
JPS5714905A JP9009180A JP9009180A JPS5714905A JP S5714905 A JPS5714905 A JP S5714905A JP 9009180 A JP9009180 A JP 9009180A JP 9009180 A JP9009180 A JP 9009180A JP S5714905 A JPS5714905 A JP S5714905A
Authority
JP
Japan
Prior art keywords
service interruption
contents
contact
renewal
power source
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
JP9009180A
Other languages
Japanese (ja)
Inventor
Koshi Hattori
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP9009180A priority Critical patent/JPS5714905A/en
Publication of JPS5714905A publication Critical patent/JPS5714905A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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
    • G06F1/30—Means for acting in the event of power-supply failure or interruption, e.g. power-supply fluctuations

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Input From Keyboards Or The Like (AREA)
  • Control By Computers (AREA)

Abstract

PURPOSE:To deliver the signal holding a logic level before occurrence of service interruption in case when the service interruption arises to the power source connected to a contact. CONSTITUTION:A level converter 3 supplies the voltage via a contact 1 set at on or off and produces a logic signal according to the state of the contact 1. A memory 6 stores the above-mentioned logical signal and also delivers the contents when the above-mentioned voltage is detected and then prevents a renewal of the contents of storage in case when the above-mentioned voltage is not detected. For instance, if the power source 2 has a service interruption, the output PWON of a service interruption detecting circuit 4 is set at a low level. Thus an AND gate 5 is not opened to give no renewal to the contents of a buffer memory 6 but to keep the preceding state.
JP9009180A 1980-06-30 1980-06-30 Digital input circuit Pending JPS5714905A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9009180A JPS5714905A (en) 1980-06-30 1980-06-30 Digital input circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9009180A JPS5714905A (en) 1980-06-30 1980-06-30 Digital input circuit

Publications (1)

Publication Number Publication Date
JPS5714905A true JPS5714905A (en) 1982-01-26

Family

ID=13988840

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9009180A Pending JPS5714905A (en) 1980-06-30 1980-06-30 Digital input circuit

Country Status (1)

Country Link
JP (1) JPS5714905A (en)

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