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JPS5644921A - Bus control system - Google Patents

Bus control system

Info

Publication number
JPS5644921A
JPS5644921A JP12107479A JP12107479A JPS5644921A JP S5644921 A JPS5644921 A JP S5644921A JP 12107479 A JP12107479 A JP 12107479A JP 12107479 A JP12107479 A JP 12107479A JP S5644921 A JPS5644921 A JP S5644921A
Authority
JP
Japan
Prior art keywords
bus
signal
priority
bsavi
transmits
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
JP12107479A
Other languages
Japanese (ja)
Other versions
JPS5932808B2 (en
Inventor
Masashi Deguchi
Teiji Nishizawa
Sumio Ozawa
Katsura Kawakami
Hiroshi Izumi
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP12107479A priority Critical patent/JPS5932808B2/en
Publication of JPS5644921A publication Critical patent/JPS5644921A/en
Publication of JPS5932808B2 publication Critical patent/JPS5932808B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Bus Control (AREA)

Abstract

PURPOSE: To give the use for the bus request from each device, which is connected to the bus, according to priority and make it possible to control the bus occupation time by the data transfer strobe signal issued from the device.
CONSTITUTION: Operation processing unit (priority=i) issues bus use request signal BSRQi to the bus control device. The bus control device selects a device of the highest priority and transmits use permission signal BSAVi. The device which received this signal BSAVi transmits data transfer signal DTSD by a required transfer frequency and transfers data. When request BSRQj of priority higher than (i) is output, the bus control unit discriminates turning-on or off of the BSRQi by DTSD and stops transmission of BSAVi at the turning-off time of the error signal and transmits BSAVj of higher priority to transfer the use of the bus.
COPYRIGHT: (C)1981,JPO&Japio
JP12107479A 1979-09-20 1979-09-20 Bus control method Expired JPS5932808B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12107479A JPS5932808B2 (en) 1979-09-20 1979-09-20 Bus control method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12107479A JPS5932808B2 (en) 1979-09-20 1979-09-20 Bus control method

Publications (2)

Publication Number Publication Date
JPS5644921A true JPS5644921A (en) 1981-04-24
JPS5932808B2 JPS5932808B2 (en) 1984-08-11

Family

ID=14802192

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12107479A Expired JPS5932808B2 (en) 1979-09-20 1979-09-20 Bus control method

Country Status (1)

Country Link
JP (1) JPS5932808B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6015763A (en) * 1983-07-05 1985-01-26 インタ−ナショナル　ビジネス　マシ−ンズ　コ−ポレ−ション Interface controller
JPS621054A (en) * 1985-06-13 1987-01-07 Fujitsu Ltd Bus control system
JPS6289159A (en) * 1985-10-11 1987-04-23 サン・マイクロシステムズ・インコ−ポレ−テツド Method and apparatus for allotting access to data processingresource

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6015763A (en) * 1983-07-05 1985-01-26 インタ−ナショナル　ビジネス　マシ−ンズ　コ−ポレ−ション Interface controller
JPS621054A (en) * 1985-06-13 1987-01-07 Fujitsu Ltd Bus control system
JPH0462097B2 (en) * 1985-06-13 1992-10-05 Fujitsu Ltd
JPS6289159A (en) * 1985-10-11 1987-04-23 サン・マイクロシステムズ・インコ−ポレ−テツド Method and apparatus for allotting access to data processingresource

Also Published As

Publication number Publication date
JPS5932808B2 (en) 1984-08-11

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