JPS5720832A - Interruption input circuit - Google Patents

Interruption input circuit

Info

Publication number
JPS5720832A
JPS5720832A JP9506880A JP9506880A JPS5720832A JP S5720832 A JPS5720832 A JP S5720832A JP 9506880 A JP9506880 A JP 9506880A JP 9506880 A JP9506880 A JP 9506880A JP S5720832 A JPS5720832 A JP S5720832A
Authority
JP
Japan
Prior art keywords
signal
flop
flip
interruption
chattering
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
JP9506880A
Other languages
Japanese (ja)
Inventor
Akira Kizuya
Osao Yoshida
Takashi Kano
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 JP9506880A priority Critical patent/JPS5720832A/en
Publication of JPS5720832A publication Critical patent/JPS5720832A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
    • G06F13/14—Handling requests for interconnection or transfer
    • G06F13/20—Handling requests for interconnection or transfer for access to input/output bus
    • G06F13/24—Handling requests for interconnection or transfer for access to input/output bus using interrupt

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)
  • Bus Control (AREA)
  • Safety Devices In Control Systems (AREA)

Abstract

PURPOSE:To digitally absorb chattering of an input signal, by shaping the waveform of the input signal in an interruption input circuit and by a filter using a filp- flop having plural stages. CONSTITUTION:A clock signal 29 is divided through a dividing circuit 23 into 1/8, for instance, and then applied to a timing terminal T of a flip-flop 21 of the 1st stage as a timing signal 25. When application of an interruption input signal 5 having the chattering, the flip-flop 21 is set by the rise of the signal 25. Thus the subsequent input signals 5 are not fetched. The output 26 of the flip-flop 21 sets a flip-flop 22 to deliver an interruption output signal 7. The flip-flops 21 and 22 are reset when no signal 5 exists and with application of the signal 25 or an interruption reset signal 27. Thus the chattering of an interruption input signal is absorbed to eliminate an error output caused by chattering.
JP9506880A 1980-07-14 1980-07-14 Interruption input circuit Pending JPS5720832A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9506880A JPS5720832A (en) 1980-07-14 1980-07-14 Interruption input circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9506880A JPS5720832A (en) 1980-07-14 1980-07-14 Interruption input circuit

Publications (1)

Publication Number Publication Date
JPS5720832A true JPS5720832A (en) 1982-02-03

Family

ID=14127677

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9506880A Pending JPS5720832A (en) 1980-07-14 1980-07-14 Interruption input circuit

Country Status (1)

Country Link
JP (1) JPS5720832A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59160223A (en) * 1983-03-03 1984-09-10 Mitsubishi Electric Corp Signal input device
US4661048A (en) * 1984-11-07 1987-04-28 Jidosha Kiki Co., Ltd. Electromagnetic pump with simplified construction

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59160223A (en) * 1983-03-03 1984-09-10 Mitsubishi Electric Corp Signal input device
JPS63830B2 (en) * 1983-03-03 1988-01-08 Mitsubishi Electric Corp
US4661048A (en) * 1984-11-07 1987-04-28 Jidosha Kiki Co., Ltd. Electromagnetic pump with simplified construction

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