JPS55110450A - Data transmission unit - Google Patents

Data transmission unit

Info

Publication number
JPS55110450A
JPS55110450A JP1750679A JP1750679A JPS55110450A JP S55110450 A JPS55110450 A JP S55110450A JP 1750679 A JP1750679 A JP 1750679A JP 1750679 A JP1750679 A JP 1750679A JP S55110450 A JPS55110450 A JP S55110450A
Authority
JP
Japan
Prior art keywords
circuit
line
data transmission
transmission
units
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
JP1750679A
Other languages
Japanese (ja)
Other versions
JPS6147455B2 (en
Inventor
Akira Watanabe
Masayuki Eguchi
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP1750679A priority Critical patent/JPS55110450A/en
Publication of JPS55110450A publication Critical patent/JPS55110450A/en
Publication of JPS6147455B2 publication Critical patent/JPS6147455B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/40—Bus networks
    • H04L12/40006—Architecture of a communication node
    • H04L12/40013—Details regarding a bus controller
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/40—Bus networks
    • H04L12/403—Bus networks with centralised control, e.g. polling

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Bus Control (AREA)
  • Small-Scale Networks (AREA)

Abstract

PURPOSE:To increase the efficiency of data transmission, by connecting the transmission line for data transmission and polling line to a plurality of station units of the data transmission system and connecting a simple additional circuit. CONSTITUTION:A plurality of station units A-D of the data transmission system are connected in tree shape with the transmission line 3, the polling line 2 connected to the clock generation circuit 4 is respectively connected to the units A-A, and the units A-D are provided with the counter circuit 5, data line vacancy detection circuit 7 and transmission and reception circuit 10. Further, the computer K is connected to the units A-D, and the request signal from the computer K, vacant signal on the transmission line 3 detected with the circuit 7 and the signal on the polling line 2 are fed to the AND circuit 6, the output of the circuit 6 controls the circuit 10 for the data transmission on the transmission line 3 or the reception of the data on the transmission line 3, allowing to increase the data transmission.
JP1750679A 1979-02-16 1979-02-16 Data transmission unit Granted JPS55110450A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1750679A JPS55110450A (en) 1979-02-16 1979-02-16 Data transmission unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1750679A JPS55110450A (en) 1979-02-16 1979-02-16 Data transmission unit

Publications (2)

Publication Number Publication Date
JPS55110450A true JPS55110450A (en) 1980-08-25
JPS6147455B2 JPS6147455B2 (en) 1986-10-20

Family

ID=11945855

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1750679A Granted JPS55110450A (en) 1979-02-16 1979-02-16 Data transmission unit

Country Status (1)

Country Link
JP (1) JPS55110450A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0193942A (en) * 1987-10-06 1989-04-12 Sumitomo Electric Ind Ltd Data transmission method
JPH04267458A (en) * 1991-02-22 1992-09-24 Sharp Corp Optically coupled device and information equipment using this

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01121552A (en) * 1987-11-06 1989-05-15 Ngk Insulators Ltd Piston of internal combustion engine
CN111971604B (en) 2018-03-28 2022-05-17 索尼公司 Rigid mirror optical system, imaging device, and endoscope system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0193942A (en) * 1987-10-06 1989-04-12 Sumitomo Electric Ind Ltd Data transmission method
JPH04267458A (en) * 1991-02-22 1992-09-24 Sharp Corp Optically coupled device and information equipment using this

Also Published As

Publication number Publication date
JPS6147455B2 (en) 1986-10-20

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