JPS5739452A - Timer interruption system - Google Patents

Timer interruption system

Info

Publication number
JPS5739452A
JPS5739452A JP55114222A JP11422280A JPS5739452A JP S5739452 A JPS5739452 A JP S5739452A JP 55114222 A JP55114222 A JP 55114222A JP 11422280 A JP11422280 A JP 11422280A JP S5739452 A JPS5739452 A JP S5739452A
Authority
JP
Japan
Prior art keywords
timer
counter
timer interruption
microprocessor
interruption
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
JP55114222A
Other languages
Japanese (ja)
Inventor
Masabumi Watanabe
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP55114222A priority Critical patent/JPS5739452A/en
Publication of JPS5739452A publication Critical patent/JPS5739452A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F9/00—Arrangements for program control, e.g. control units
    • G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
    • G06F9/46—Multiprogramming arrangements
    • G06F9/48—Program initiating; Program switching, e.g. by interrupt
    • G06F9/4806—Task transfer initiation or dispatching
    • G06F9/4812—Task transfer initiation or dispatching by interrupt, e.g. masked
    • G06F9/4825—Interrupt from clock, e.g. time of day

Landscapes

  • Engineering & Computer Science (AREA)
  • Software Systems (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Microcomputers (AREA)

Abstract

PURPOSE:To elevate an interruption function, by constituting a timer counter of high rank and low rank counters, and providing a timer interruption processing start address setting circuit which is capable of setting plural timer interruption start addresses in accordance with the contents of the high rank counter. CONSTITUTION:When a start timer instruction comes from a microprocessor, a switch 13 is connected to the side of a prescaler 11, a pulse obtained by frequency- dividing a basic clock from the microprocessor by the prescaler is inputted to a low rank counter 14, and counting is started. When the counter 14 outputs an overflow signal, an FF16 is set, its output takes AND with a timer interruptable signal sent from the microprocessor, is sent to the processor as a timer interruption signal, and enters into the interruption processing. An output of the FF16 is inputted to a high rank counter 19 through a switch 17 which is closed by a count start instruction, the counting operation is executed, and when it has ended, its count value generates a timer interruption processing start address, and the processing is executed.
JP55114222A 1980-08-20 1980-08-20 Timer interruption system Pending JPS5739452A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55114222A JPS5739452A (en) 1980-08-20 1980-08-20 Timer interruption system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55114222A JPS5739452A (en) 1980-08-20 1980-08-20 Timer interruption system

Publications (1)

Publication Number Publication Date
JPS5739452A true JPS5739452A (en) 1982-03-04

Family

ID=14632282

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55114222A Pending JPS5739452A (en) 1980-08-20 1980-08-20 Timer interruption system

Country Status (1)

Country Link
JP (1) JPS5739452A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS585854A (en) * 1981-07-02 1983-01-13 Fujitsu Ltd Program period starting system
JPS61164480A (en) * 1985-01-11 1986-07-25 Hitachi Ltd Controller of motor
JPS6332636A (en) * 1986-07-28 1988-02-12 Fuji Electric Co Ltd Starting system for fixed cycle interruption program
JPH01263740A (en) * 1988-04-13 1989-10-20 Nec Corp Micro-computer

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS585854A (en) * 1981-07-02 1983-01-13 Fujitsu Ltd Program period starting system
JPH0364887B2 (en) * 1981-07-02 1991-10-08 Fujitsu Kk
JPS61164480A (en) * 1985-01-11 1986-07-25 Hitachi Ltd Controller of motor
JPS6332636A (en) * 1986-07-28 1988-02-12 Fuji Electric Co Ltd Starting system for fixed cycle interruption program
JPH0461378B2 (en) * 1986-07-28 1992-09-30 Fuji Denki Kk
JPH01263740A (en) * 1988-04-13 1989-10-20 Nec Corp Micro-computer

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