JPS6474848A - Device for connecting plural terminals to serial interface port - Google Patents

Device for connecting plural terminals to serial interface port

Info

Publication number
JPS6474848A
JPS6474848A JP62233197A JP23319787A JPS6474848A JP S6474848 A JPS6474848 A JP S6474848A JP 62233197 A JP62233197 A JP 62233197A JP 23319787 A JP23319787 A JP 23319787A JP S6474848 A JPS6474848 A JP S6474848A
Authority
JP
Japan
Prior art keywords
terminal
signal
interface port
output signal
serial interface
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
JP62233197A
Other languages
Japanese (ja)
Inventor
Hiroshi Asada
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.)
Toshiba Corp
Original Assignee
Toshiba 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 Toshiba Corp filed Critical Toshiba Corp
Priority to JP62233197A priority Critical patent/JPS6474848A/en
Publication of JPS6474848A publication Critical patent/JPS6474848A/en
Pending legal-status Critical Current

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  • Communication Control (AREA)

Abstract

PURPOSE:To permit a connector between each terminal and an interface port to be left connected, by identifying a terminal issuing a transmission request signal first, and selecting and inputting only the output signal of the terminal to the serial interface port. CONSTITUTION:The terminals 1 and 2 are connected to three-state buffer gates 21 and 22 via corresponding standard receiver/drivers 11 and 12. By inputting an RTS signal (transmission request signal representing the presence of information to be transmitted from the terminal) inputted from the receiver/drivers 11 and 12 to an arbitration circuit 30, the circuit 30 precedes the RTS signal generated first in the RTS signal of each terminal, and supplies a signal to permit the input of the output signal from the terminal to the buffer gates 21 and 22. Thereby, only the RTS signal and the output signal of the terminal generated preferentially are selected at the buffer gates 21 and 22, and are inputted to the serial interface port 50. Also. the output signal from the port 50 is supplied to the terminals 1 and 2 via the receiver/drivers 11 and 12 corresponding to the terminal in parallel, and the output signal can be monitored or used in each of the terminals 1 and 2 simultaneously.
JP62233197A 1987-09-17 1987-09-17 Device for connecting plural terminals to serial interface port Pending JPS6474848A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62233197A JPS6474848A (en) 1987-09-17 1987-09-17 Device for connecting plural terminals to serial interface port

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62233197A JPS6474848A (en) 1987-09-17 1987-09-17 Device for connecting plural terminals to serial interface port

Publications (1)

Publication Number Publication Date
JPS6474848A true JPS6474848A (en) 1989-03-20

Family

ID=16951269

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62233197A Pending JPS6474848A (en) 1987-09-17 1987-09-17 Device for connecting plural terminals to serial interface port

Country Status (1)

Country Link
JP (1) JPS6474848A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100359422B1 (en) * 1997-04-02 2003-03-29 오끼 덴끼 고오교 가부시끼가이샤 Serial communication circuit

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60116245A (en) * 1983-11-28 1985-06-22 Seiichi Miyazaki Tree form data transmission system
JPS6215955A (en) * 1985-07-15 1987-01-24 Oki Electric Ind Co Ltd Contention control system
JPS6215956A (en) * 1985-07-15 1987-01-24 Oki Electric Ind Co Ltd Contention control system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60116245A (en) * 1983-11-28 1985-06-22 Seiichi Miyazaki Tree form data transmission system
JPS6215955A (en) * 1985-07-15 1987-01-24 Oki Electric Ind Co Ltd Contention control system
JPS6215956A (en) * 1985-07-15 1987-01-24 Oki Electric Ind Co Ltd Contention control system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100359422B1 (en) * 1997-04-02 2003-03-29 오끼 덴끼 고오교 가부시끼가이샤 Serial communication circuit

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