JPS6474848A - Device for connecting plural terminals to serial interface port - Google Patents
Device for connecting plural terminals to serial interface portInfo
- 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
Links
Landscapes
- 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.
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)
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)
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 |
-
1987
- 1987-09-17 JP JP62233197A patent/JPS6474848A/en active Pending
Patent Citations (3)
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)
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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