JPS56132040A - Transfer system of serial data - Google Patents

Transfer system of serial data

Info

Publication number
JPS56132040A
JPS56132040A JP3488380A JP3488380A JPS56132040A JP S56132040 A JPS56132040 A JP S56132040A JP 3488380 A JP3488380 A JP 3488380A JP 3488380 A JP3488380 A JP 3488380A JP S56132040 A JPS56132040 A JP S56132040A
Authority
JP
Japan
Prior art keywords
equipment
signal
level
data
transmission request
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
JP3488380A
Other languages
Japanese (ja)
Inventor
Kazuo Tsuruta
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.)
Pioneer Corp
Original Assignee
Pioneer Electronic 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 Pioneer Electronic Corp filed Critical Pioneer Electronic Corp
Priority to JP3488380A priority Critical patent/JPS56132040A/en
Publication of JPS56132040A publication Critical patent/JPS56132040A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/14—Two-way operation using the same type of signal, i.e. duplex
    • H04L5/16—Half-duplex systems; Simplex/duplex switching; Transmission of break signals non-automatically inverting the direction of transmission

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Bidirectional Digital Transmission (AREA)

Abstract

PURPOSE:To reduce the number of communication lines, by detecting the nobusy state of the other equipment by one equipment to transmit data from one equipment and by detecting data transfer from the other equipment by one equipment to receive transfer data, in the system simultaneous two-way data transfer is not required. CONSTITUTION:When equipment A transmits data to equipment B, equipment A detects whether input signal AI from communication line W is high-level or not, and equipment A waits until signal AI becomes high-level if signal AI is low-level, that is, equipment B is busy. When signal AI becomes high-level, equipment A transmits output signal AO through transistor inverter 5, and this signal is received as input signal BI of equipment B. Equipment B decides whether signal AO is the data transmission request to equipment B or not after the delay time after receiving of signal AO; and if it is the transmission request, output signal BO is transmitted from output terminal 4 of equipment B through inverter 6; and if it is not the transmission request, output terminal 4 is made high-potential to indicate that equipment B is busy, and output terminal 4 is made low-potential after the processing in equipment B.
JP3488380A 1980-03-21 1980-03-21 Transfer system of serial data Pending JPS56132040A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3488380A JPS56132040A (en) 1980-03-21 1980-03-21 Transfer system of serial data

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3488380A JPS56132040A (en) 1980-03-21 1980-03-21 Transfer system of serial data

Publications (1)

Publication Number Publication Date
JPS56132040A true JPS56132040A (en) 1981-10-16

Family

ID=12426531

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3488380A Pending JPS56132040A (en) 1980-03-21 1980-03-21 Transfer system of serial data

Country Status (1)

Country Link
JP (1) JPS56132040A (en)

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