JPS5565187A - Electronic control unit - Google Patents

Electronic control unit

Info

Publication number
JPS5565187A
JPS5565187A JP13960478A JP13960478A JPS5565187A JP S5565187 A JPS5565187 A JP S5565187A JP 13960478 A JP13960478 A JP 13960478A JP 13960478 A JP13960478 A JP 13960478A JP S5565187 A JPS5565187 A JP S5565187A
Authority
JP
Japan
Prior art keywords
program
time
instruction
routines
microprocessor
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
JP13960478A
Other languages
Japanese (ja)
Inventor
Kosaku Uota
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP13960478A priority Critical patent/JPS5565187A/en
Publication of JPS5565187A publication Critical patent/JPS5565187A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04G—ELECTRONIC TIME-PIECES
    • G04G3/00—Producing timing pulses
    • G04G3/02—Circuits for deriving low frequency timing pulses from pulses of higher frequency
    • G04G3/025—Circuits for deriving low frequency timing pulses from pulses of higher frequency by storing time-date which are periodically investigated and modified accordingly, e.g. by using cyclic shift-registers

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electric Clocks (AREA)

Abstract

PURPOSE:To produce the reference signal for time, by keeping equal the number of instruction cycles for each processing routine in the program of microprocessor each other and counting the cycle time of program. CONSTITUTION:In the microprocessor 2, when the program goes from the start point A to the end point B, it is branched into three routines with the presence of the judgement and instruction sections 1B and 2B. By keeping equal those three routines and the number of instruction cycles, the program processing cycle time is kept constant. In the internal of the non-judgement instruction section 1A, count up is made by one through one time passage of the routine and reset is made when this counter reaches N to form the reference signal of one second. Thus, crystal oscillator is used for the reference frequency oscillator 1 to control the output unit having the time element such as digital type or analog type clock 3.
JP13960478A 1978-11-10 1978-11-10 Electronic control unit Pending JPS5565187A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13960478A JPS5565187A (en) 1978-11-10 1978-11-10 Electronic control unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13960478A JPS5565187A (en) 1978-11-10 1978-11-10 Electronic control unit

Publications (1)

Publication Number Publication Date
JPS5565187A true JPS5565187A (en) 1980-05-16

Family

ID=15249136

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13960478A Pending JPS5565187A (en) 1978-11-10 1978-11-10 Electronic control unit

Country Status (1)

Country Link
JP (1) JPS5565187A (en)

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