JPS5676661A - Data transmission control circuit - Google Patents
Data transmission control circuitInfo
- Publication number
- JPS5676661A JPS5676661A JP15480579A JP15480579A JPS5676661A JP S5676661 A JPS5676661 A JP S5676661A JP 15480579 A JP15480579 A JP 15480579A JP 15480579 A JP15480579 A JP 15480579A JP S5676661 A JPS5676661 A JP S5676661A
- Authority
- JP
- Japan
- Prior art keywords
- output
- signal
- circuit
- signal line
- data transmission
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/38—Synchronous or start-stop systems, e.g. for Baudot code
- H04L25/40—Transmitting circuits; Receiving circuits
- H04L25/45—Transmitting circuits; Receiving circuits using electronic distributors
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Communication Control (AREA)
Abstract
PURPOSE:To reduce the number of signal lines, by superimposing the signal indicating the state of the station itself to the data transmission signal line and providing the circuit detecting the status of opposing side to the reception signal line system. CONSTITUTION:When the output of a transmission buffer 24 is at low level, a signal is fed via resistor 23, signal line 16, photocoupler 9 of communication control unit 1 and signal line 17, and the inverter 12 is at high level for the output. The output of the photocoupler 9 enters a monostable circuit 11, and while a signal is fed to the circuit 11, the output is at high level. A signal is picked up from the output of the inverter 12 and the state of transmission can be known from the output of an OR circuit 13.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15480579A JPS5676661A (en) | 1979-11-28 | 1979-11-28 | Data transmission control circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15480579A JPS5676661A (en) | 1979-11-28 | 1979-11-28 | Data transmission control circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5676661A true JPS5676661A (en) | 1981-06-24 |
Family
ID=15592266
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15480579A Pending JPS5676661A (en) | 1979-11-28 | 1979-11-28 | Data transmission control circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5676661A (en) |
-
1979
- 1979-11-28 JP JP15480579A patent/JPS5676661A/en active Pending
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