JPS54100234A - Common bus system input/output circuit - Google Patents

Common bus system input/output circuit

Info

Publication number
JPS54100234A
JPS54100234A JP625778A JP625778A JPS54100234A JP S54100234 A JPS54100234 A JP S54100234A JP 625778 A JP625778 A JP 625778A JP 625778 A JP625778 A JP 625778A JP S54100234 A JPS54100234 A JP S54100234A
Authority
JP
Japan
Prior art keywords
circuit
bus
bus control
input
output
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
JP625778A
Other languages
Japanese (ja)
Inventor
Yoshiaki Takahashi
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 JP625778A priority Critical patent/JPS54100234A/en
Publication of JPS54100234A publication Critical patent/JPS54100234A/en
Pending legal-status Critical Current

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  • Bus Control (AREA)
  • Small-Scale Networks (AREA)

Abstract

PURPOSE: To enhance the reliability for the input/output circuit by connecting plural input/output circuits connedted to the common bus to the bus control signal line and providing the bus control part to the input/output circuit.
CONSTITUTION: For the master station display circuit of the 1:N-type remote contol device, display data D1WDn given from each slave station are received and error-checked at receiver circuit 1 to be stored in memory 2 of each slave station. Common bus signal line 5 to collect the necessary data and bus control signal line 6 to make pass the control signals such as the bus occupation request signal and others are provided between memory 2 and output circuit 10. The bus control circuit part is provided to circuit 10, and non-bus control detector circuit is provided at the bus contol circuit part to detect the time point when no bus control signal sent from other output circuits exists or detect the priority. And the occupation permission signal of common bus 5 is delivered under the conditions that no bus control signal sent from other bus control parts as well as from other output circfits fraturing the higher priority. Thus, the control circuit is installed with every input/output circuit, so that the reliability can be enhanced for the input/output circuit.
COPYRIGHT: (C)1979,JPO&Japio
JP625778A 1978-01-25 1978-01-25 Common bus system input/output circuit Pending JPS54100234A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP625778A JPS54100234A (en) 1978-01-25 1978-01-25 Common bus system input/output circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP625778A JPS54100234A (en) 1978-01-25 1978-01-25 Common bus system input/output circuit

Publications (1)

Publication Number Publication Date
JPS54100234A true JPS54100234A (en) 1979-08-07

Family

ID=11633415

Family Applications (1)

Application Number Title Priority Date Filing Date
JP625778A Pending JPS54100234A (en) 1978-01-25 1978-01-25 Common bus system input/output circuit

Country Status (1)

Country Link
JP (1) JPS54100234A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS622742A (en) * 1985-06-28 1987-01-08 Toshiba Corp Collision detecting system

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50137636A (en) * 1974-04-22 1975-10-31
JPS50150332A (en) * 1974-05-22 1975-12-02
JPS50156838A (en) * 1974-06-07 1975-12-18
JPS5160428A (en) * 1974-11-25 1976-05-26 Hitachi Ltd

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50137636A (en) * 1974-04-22 1975-10-31
JPS50150332A (en) * 1974-05-22 1975-12-02
JPS50156838A (en) * 1974-06-07 1975-12-18
JPS5160428A (en) * 1974-11-25 1976-05-26 Hitachi Ltd

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS622742A (en) * 1985-06-28 1987-01-08 Toshiba Corp Collision detecting system

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