JPS54159137A - Selector - Google Patents

Selector

Info

Publication number
JPS54159137A
JPS54159137A JP6779378A JP6779378A JPS54159137A JP S54159137 A JPS54159137 A JP S54159137A JP 6779378 A JP6779378 A JP 6779378A JP 6779378 A JP6779378 A JP 6779378A JP S54159137 A JPS54159137 A JP S54159137A
Authority
JP
Japan
Prior art keywords
control unit
test
selection
spare
arbitrary
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
JP6779378A
Other languages
Japanese (ja)
Other versions
JPS5953583B2 (en
Inventor
Kozo Fukuda
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 JP53067793A priority Critical patent/JPS5953583B2/en
Publication of JPS54159137A publication Critical patent/JPS54159137A/en
Publication of JPS5953583B2 publication Critical patent/JPS5953583B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Hardware Redundancy (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)

Abstract

PURPOSE: To establish the selector making unnecessary the I/O exclusive use for the test, by providing the means selecting the input and output unit I/O to the spare control unit in block unit and giving the interlocking function selecting arbitrary I/O individually.
CONSTITUTION: When the control unit 3 for present use is in failure, the block selection circuit 9 is operated with the selection signal from the block control section 11 and the I/O DA1 to DAn connected to the control unit of A are selected to the input and output corresponding section 4 of the spare control unit 3 at a bundle. When an arbitrary I/O 1 is used for test with selection, the individual selection circuit 10 is operated with the selection signal from the individual selection control section 12, and the I/O DA1 connected to the control unit I/O corresponding section 4 of A is changed over to the I/O corresponding section of the spare control unit 3. A plurality of I/O's are never connected to the spare control unit simultaneously with the control signal from the interlock control circuit 13 made at the same time. Accordingly, even ON line, arbitrary I/O can be selected for test and I/O for exclusive use test is not needed.
COPYRIGHT: (C)1979,JPO&Japio
JP53067793A 1978-06-07 1978-06-07 switching device Expired JPS5953583B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP53067793A JPS5953583B2 (en) 1978-06-07 1978-06-07 switching device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP53067793A JPS5953583B2 (en) 1978-06-07 1978-06-07 switching device

Publications (2)

Publication Number Publication Date
JPS54159137A true JPS54159137A (en) 1979-12-15
JPS5953583B2 JPS5953583B2 (en) 1984-12-26

Family

ID=13355175

Family Applications (1)

Application Number Title Priority Date Filing Date
JP53067793A Expired JPS5953583B2 (en) 1978-06-07 1978-06-07 switching device

Country Status (1)

Country Link
JP (1) JPS5953583B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58137054A (en) * 1981-10-01 1983-08-15 ストレイタス・コンピユ−タ・インコ−ポレイテツド Highly reliable digital data processor
JPS5943451A (en) * 1982-09-02 1984-03-10 Ohkura Electric Co Ltd Signal processor with intelligent stand-by function

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58137054A (en) * 1981-10-01 1983-08-15 ストレイタス・コンピユ−タ・インコ−ポレイテツド Highly reliable digital data processor
JPH0531173B2 (en) * 1981-10-01 1993-05-11 Sutoreitasu Konpyuuta Inc
JPS5943451A (en) * 1982-09-02 1984-03-10 Ohkura Electric Co Ltd Signal processor with intelligent stand-by function

Also Published As

Publication number Publication date
JPS5953583B2 (en) 1984-12-26

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