JPS6461851A - Data transmission/reception system - Google Patents

Data transmission/reception system

Info

Publication number
JPS6461851A
JPS6461851A JP21948687A JP21948687A JPS6461851A JP S6461851 A JPS6461851 A JP S6461851A JP 21948687 A JP21948687 A JP 21948687A JP 21948687 A JP21948687 A JP 21948687A JP S6461851 A JPS6461851 A JP S6461851A
Authority
JP
Japan
Prior art keywords
information
dav
data
signal
reception
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
JP21948687A
Other languages
Japanese (ja)
Inventor
Masae Takahashi
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.)
NEC Corp
Original Assignee
NEC 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 NEC Corp filed Critical NEC Corp
Priority to JP21948687A priority Critical patent/JPS6461851A/en
Publication of JPS6461851A publication Critical patent/JPS6461851A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
    • G06F13/38—Information transfer, e.g. on bus
    • G06F13/42—Bus transfer protocol, e.g. handshake; Synchronisation
    • G06F13/4204—Bus transfer protocol, e.g. handshake; Synchronisation on a parallel bus
    • G06F13/4208—Bus transfer protocol, e.g. handshake; Synchronisation on a parallel bus being a system bus, e.g. VME bus, Futurebus, Multibus
    • G06F13/4213—Bus transfer protocol, e.g. handshake; Synchronisation on a parallel bus being a system bus, e.g. VME bus, Futurebus, Multibus with asynchronous protocol

Abstract

PURPOSE:To double the data transmitting/receiving speed by giving the significance for each change of a handshake signal, i.e., a binary signal in an information transmission/reception system which works via the general-purpose parallel interfaces. CONSTITUTION:When the information are sent to a sub-system (b) from a main system (a) via the general-purpose parallel interfaces C, the receiving system (b) sets the RFD (ready for data) at 1 to show a ready state for reception of information. Thus the system (a) sends the first information to the system (b) and sets the DAV (data valid) at 1. The system (b) confirms the DAV and receives the information to set the DAC (data accepted) and the RFD at 1 and 0 respectively. The system (a) confirms that the DAC and the RFD are set at 1 and 0 respectively and sends the second information to the system (b) to set the DAV at 0. The system (b) confirms the DAV and receives the information to set the DAC at 0. In such a way, the significance is given even when a signal is changed to 0 from 1 for handshake. Thus the transmission/ reception is possible twice with a single handshake. As a result, the signal checking frequency is halved and the data transfer speed is double respectively.
JP21948687A 1987-09-01 1987-09-01 Data transmission/reception system Pending JPS6461851A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP21948687A JPS6461851A (en) 1987-09-01 1987-09-01 Data transmission/reception system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP21948687A JPS6461851A (en) 1987-09-01 1987-09-01 Data transmission/reception system

Publications (1)

Publication Number Publication Date
JPS6461851A true JPS6461851A (en) 1989-03-08

Family

ID=16736198

Family Applications (1)

Application Number Title Priority Date Filing Date
JP21948687A Pending JPS6461851A (en) 1987-09-01 1987-09-01 Data transmission/reception system

Country Status (1)

Country Link
JP (1) JPS6461851A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02281360A (en) * 1989-04-21 1990-11-19 Nippon Telegr & Teleph Corp <Ntt> Asynchronous data transfer system
US5670412A (en) * 1995-07-25 1997-09-23 Micron Technology, Inc. Semiconductor processing methods of forming field oxidation regions on a semiconductor substrate
KR20010061541A (en) * 1999-12-28 2001-07-07 송재인 3 line handshaking interface
CN117312221A (en) * 2023-11-28 2023-12-29 西安现代控制技术研究所 Triggering type SPI data communication method

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02281360A (en) * 1989-04-21 1990-11-19 Nippon Telegr & Teleph Corp <Ntt> Asynchronous data transfer system
US5670412A (en) * 1995-07-25 1997-09-23 Micron Technology, Inc. Semiconductor processing methods of forming field oxidation regions on a semiconductor substrate
US6013560A (en) * 1995-07-25 2000-01-11 Micron Technology, Inc. Semiconductor processing methods of forming field oxidation regions on a semiconductor substrate
KR20010061541A (en) * 1999-12-28 2001-07-07 송재인 3 line handshaking interface
CN117312221A (en) * 2023-11-28 2023-12-29 西安现代控制技术研究所 Triggering type SPI data communication method
CN117312221B (en) * 2023-11-28 2024-03-15 西安现代控制技术研究所 Triggering type SPI data communication method

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