JPS57137953A - Clock stop system - Google Patents

Clock stop system

Info

Publication number
JPS57137953A
JPS57137953A JP56023807A JP2380781A JPS57137953A JP S57137953 A JPS57137953 A JP S57137953A JP 56023807 A JP56023807 A JP 56023807A JP 2380781 A JP2380781 A JP 2380781A JP S57137953 A JPS57137953 A JP S57137953A
Authority
JP
Japan
Prior art keywords
circuit
output
inputted
terminal
exclusive
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
JP56023807A
Other languages
Japanese (ja)
Inventor
Hitoshi Mogi
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 JP56023807A priority Critical patent/JPS57137953A/en
Publication of JPS57137953A publication Critical patent/JPS57137953A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/28—Testing of electronic circuits, e.g. by signal tracer
    • G01R31/317—Testing of digital circuits
    • G01R31/3181—Functional testing
    • G01R31/3185—Reconfiguring for testing, e.g. LSSD, partitioning
    • G01R31/318533—Reconfiguring for testing, e.g. LSSD, partitioning using scanning techniques, e.g. LSSD, Boundary Scan, JTAG
    • G01R31/318552—Clock circuits details

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Test And Diagnosis Of Digital Computers (AREA)

Abstract

PURPOSE:To stop a clock at the required time, by inputting an output of a logical circuit and an output of a signal polarity designating circuit, to one input terminal of an exclusive OR circuit and its other terminal, respectively, and detecting a difference between the logical circuit output and the signal polarity designating circuit output. CONSTITUTION:An output of a logical circuit 1 is divided into 2 branches, and one branch is inputted to a scan-out data register 4 through a flip-flop circuit 3 being a conventional circuit, and the other branch is inputted to one terminal of an exclusive OR circuit 10. A signal from a service processor (SVP) is inputted to a signal polarity designating circuit 11, and its output is inputted to the other terminal of the exclusive OR circuit 10. An output of the exclusive OR circuit 10 is inputted to one terminal of an AND circuit 13. To the other terminal of the AND circuit 13, an output of a flip-flop circuit 12 connected to the SVP is inputted. An output of the AND circuit 13 outputs a clock stop signal.
JP56023807A 1981-02-20 1981-02-20 Clock stop system Pending JPS57137953A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56023807A JPS57137953A (en) 1981-02-20 1981-02-20 Clock stop system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56023807A JPS57137953A (en) 1981-02-20 1981-02-20 Clock stop system

Publications (1)

Publication Number Publication Date
JPS57137953A true JPS57137953A (en) 1982-08-25

Family

ID=12120590

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56023807A Pending JPS57137953A (en) 1981-02-20 1981-02-20 Clock stop system

Country Status (1)

Country Link
JP (1) JPS57137953A (en)

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