JPS5622123A - Internal bus forming system for single chip function element - Google Patents

Internal bus forming system for single chip function element

Info

Publication number
JPS5622123A
JPS5622123A JP9824879A JP9824879A JPS5622123A JP S5622123 A JPS5622123 A JP S5622123A JP 9824879 A JP9824879 A JP 9824879A JP 9824879 A JP9824879 A JP 9824879A JP S5622123 A JPS5622123 A JP S5622123A
Authority
JP
Japan
Prior art keywords
bus
internal bus
circuit
switched
conduction mode
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
JP9824879A
Other languages
Japanese (ja)
Inventor
Masaharu Kimura
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP9824879A priority Critical patent/JPS5622123A/en
Publication of JPS5622123A publication Critical patent/JPS5622123A/en
Pending legal-status Critical Current

Links

Landscapes

  • Bus Control (AREA)
  • Microcomputers (AREA)

Abstract

PURPOSE: To ensure the highly effective driving with a small-size driving circuit, by dividing the internal bus into several portions through the bus selecting circuit and without increasing the chip area.
CONSTITUTION: A connection is given (as shown by broken lines) between bus selecting circuits 5-1 and 5-2 by microprocessor unit 2, and the internal bus is divided into three portions 3-1, 3-2 and 3-3 each. When the data is transferred between processor 2 and pad 4-1 connected to bus 3-2, circuit 5-1 is switched to the conduction mode by the command of processor 2 to transfer the data to pad 4-1 via only bus 3-2. And in case the data is transferred between processor 2 and pad 4-2, circuit 5-2 is switched to the conduction mode. In this case, the internal bus including the bus selecting circuit which is switched to the conduction mode is isolated from the internal bus including the bus selecting circuit which is not switched to the conduction mode to carry out the data transfer independently.
COPYRIGHT: (C)1981,JPO&Japio
JP9824879A 1979-08-01 1979-08-01 Internal bus forming system for single chip function element Pending JPS5622123A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9824879A JPS5622123A (en) 1979-08-01 1979-08-01 Internal bus forming system for single chip function element

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9824879A JPS5622123A (en) 1979-08-01 1979-08-01 Internal bus forming system for single chip function element

Publications (1)

Publication Number Publication Date
JPS5622123A true JPS5622123A (en) 1981-03-02

Family

ID=14214646

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9824879A Pending JPS5622123A (en) 1979-08-01 1979-08-01 Internal bus forming system for single chip function element

Country Status (1)

Country Link
JP (1) JPS5622123A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4516105A (en) * 1981-07-16 1985-05-07 Tokyo Shibaura Denki Kabushiki Kaisha Metal oxide varistor with non-diffusable electrodes
JPS63282554A (en) * 1987-05-14 1988-11-18 Sony Corp Microcomputer
JPH0233647A (en) * 1988-07-25 1990-02-02 Matsushita Electric Ind Co Ltd Data processor
JPH0239232A (en) * 1988-07-28 1990-02-08 Hitachi Ltd Data processor
JPH0340162A (en) * 1989-07-07 1991-02-20 Fujitsu Ltd One-chip microcomputer
JPH0348356A (en) * 1989-04-18 1991-03-01 Mitsubishi Electric Corp Bus circuit
JPH0394356A (en) * 1989-04-17 1991-04-19 V M Technol Kk Internal bus connecting structure for microprocessor
JPH0417050A (en) * 1990-05-10 1992-01-21 Mitsubishi Electric Corp One-chip microcomputer

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4516105A (en) * 1981-07-16 1985-05-07 Tokyo Shibaura Denki Kabushiki Kaisha Metal oxide varistor with non-diffusable electrodes
JPS63282554A (en) * 1987-05-14 1988-11-18 Sony Corp Microcomputer
JPH0233647A (en) * 1988-07-25 1990-02-02 Matsushita Electric Ind Co Ltd Data processor
JPH0239232A (en) * 1988-07-28 1990-02-08 Hitachi Ltd Data processor
JPH0394356A (en) * 1989-04-17 1991-04-19 V M Technol Kk Internal bus connecting structure for microprocessor
JPH0348356A (en) * 1989-04-18 1991-03-01 Mitsubishi Electric Corp Bus circuit
JPH0340162A (en) * 1989-07-07 1991-02-20 Fujitsu Ltd One-chip microcomputer
JPH0417050A (en) * 1990-05-10 1992-01-21 Mitsubishi Electric Corp One-chip microcomputer

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