JPS56155428A - Sequence monitoring device for question-and-answer type bus - Google Patents

Sequence monitoring device for question-and-answer type bus

Info

Publication number
JPS56155428A
JPS56155428A JP5905280A JP5905280A JPS56155428A JP S56155428 A JPS56155428 A JP S56155428A JP 5905280 A JP5905280 A JP 5905280A JP 5905280 A JP5905280 A JP 5905280A JP S56155428 A JPS56155428 A JP S56155428A
Authority
JP
Japan
Prior art keywords
question
flop
answer
answer type
type bus
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
JP5905280A
Other languages
Japanese (ja)
Inventor
Jiro Suzaku
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 JP5905280A priority Critical patent/JPS56155428A/en
Publication of JPS56155428A publication Critical patent/JPS56155428A/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
    • G06F13/38—Information transfer, e.g. on bus
    • G06F13/42—Bus transfer protocol, e.g. handshake; Synchronisation
    • G06F13/4204—Bus transfer protocol, e.g. handshake; Synchronisation on a parallel bus
    • G06F13/4221—Bus transfer protocol, e.g. handshake; Synchronisation on a parallel bus being an input/output bus, e.g. ISA bus, EISA bus, PCI bus, SCSI bus
    • G06F13/4226—Bus transfer protocol, e.g. handshake; Synchronisation on a parallel bus being an input/output bus, e.g. ISA bus, EISA bus, PCI bus, SCSI bus with asynchronous protocol

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Debugging And Monitoring (AREA)

Abstract

PURPOSE:To obtain a question-and-answer type bus system of high reliability by monitoring the synchronizing signals playing the role of question and answer in a sequence monitoring device of a question-and-answer type with an up-down counter thereby detecting the disturbance in the question-and-answer sequence. CONSTITUTION:Since an up-down counter 22 takes no more than either +1 or 0 at the normal time when a slave synchronizing signal SSYC11 is inputted after a master synchronizing signal MSYC10, a flop-flop 31 is not set. Since the up-down counter 22 takes +2 or -1 at the anomalous time when either of MSYC10 or SSYC11 is inputted continuously, the flip-flop 31 is also set to output an anomalous detection signal SQCK. At the anomalous time when MSYC10 and SSYC11 superpose, an AND circuit 28 goes on to set the flip-flop 31, thereby outputting the anormalous detection signal SQCK. Hence, the abnormality of the synchronizing signals is detected simply by adding the simple circuits, and therefore the question-and- answer type bus system of high reliability is obtained.
JP5905280A 1980-05-02 1980-05-02 Sequence monitoring device for question-and-answer type bus Pending JPS56155428A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5905280A JPS56155428A (en) 1980-05-02 1980-05-02 Sequence monitoring device for question-and-answer type bus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5905280A JPS56155428A (en) 1980-05-02 1980-05-02 Sequence monitoring device for question-and-answer type bus

Publications (1)

Publication Number Publication Date
JPS56155428A true JPS56155428A (en) 1981-12-01

Family

ID=13102162

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5905280A Pending JPS56155428A (en) 1980-05-02 1980-05-02 Sequence monitoring device for question-and-answer type bus

Country Status (1)

Country Link
JP (1) JPS56155428A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0739893U (en) * 1993-12-28 1995-07-18 長一 池間 Amusement facility

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0739893U (en) * 1993-12-28 1995-07-18 長一 池間 Amusement facility

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