JPS57130130A - Power supply and stop delay circuit for microcomputer - Google Patents

Power supply and stop delay circuit for microcomputer

Info

Publication number
JPS57130130A
JPS57130130A JP56015004A JP1500481A JPS57130130A JP S57130130 A JPS57130130 A JP S57130130A JP 56015004 A JP56015004 A JP 56015004A JP 1500481 A JP1500481 A JP 1500481A JP S57130130 A JPS57130130 A JP S57130130A
Authority
JP
Japan
Prior art keywords
microcomputer
turned
switch
power supply
capacitor
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
JP56015004A
Other languages
Japanese (ja)
Other versions
JPS609285B2 (en
Inventor
Toru 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.)
Nissan Motor Co Ltd
Original Assignee
Nissan Motor 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 Nissan Motor Co Ltd filed Critical Nissan Motor Co Ltd
Priority to JP56015004A priority Critical patent/JPS609285B2/en
Publication of JPS57130130A publication Critical patent/JPS57130130A/en
Publication of JPS609285B2 publication Critical patent/JPS609285B2/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/26—Power supply means, e.g. regulation thereof

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Power Sources (AREA)
  • Stand-By Power Supply Arrangements (AREA)
  • Direct Current Feeding And Distribution (AREA)

Abstract

PURPOSE:To realize an inexpensive and simple delay circuit, by storing energy from a power source when a power supply switch is turned on and discharging stored energy to a microcomputer for a time required for data saving without flowing it backward to the power source side when the power supply switch is turned off. CONSTITUTION:When an ignition switch 2 is turned on, the current from a battery 1 is supplied to a microcomputer 6 through a diode 7 and a three-terminal voltage regulator 5, and meanwhile, electric energy is stored in a capacitor 8 as electric charge. When the switch 2 is turned off, electric charge stored in the capacitor 8 is discharged to supply a constant voltage to the microcomputer 6. The current is prevented from flowing backward to other loads in the power source side by the diode 7, and a stop delay time is determined by the capacity of the capacitor 8. At the rise of the voltage of an input terminal IRQ, the microcomputer 6 detects turning-off of the switch 2 and stops an executing control program and executes a data saving program in the interrupt processing to save data in a backup memory which is not shown in figure.
JP56015004A 1981-02-05 1981-02-05 Power supply stop delay circuit for microcomputer Expired JPS609285B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56015004A JPS609285B2 (en) 1981-02-05 1981-02-05 Power supply stop delay circuit for microcomputer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56015004A JPS609285B2 (en) 1981-02-05 1981-02-05 Power supply stop delay circuit for microcomputer

Publications (2)

Publication Number Publication Date
JPS57130130A true JPS57130130A (en) 1982-08-12
JPS609285B2 JPS609285B2 (en) 1985-03-09

Family

ID=11876745

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56015004A Expired JPS609285B2 (en) 1981-02-05 1981-02-05 Power supply stop delay circuit for microcomputer

Country Status (1)

Country Link
JP (1) JPS609285B2 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59179431U (en) * 1983-05-17 1984-11-30 横河電機株式会社 Power outage detection circuit
JPS60140413A (en) * 1983-12-28 1985-07-25 Hitachi Maxell Ltd Memory backup circuit
JPS62151633U (en) * 1986-03-12 1987-09-25
JPH0359800A (en) * 1989-07-28 1991-03-14 Hochiki Corp Alarm receiver
FR2685142A1 (en) * 1991-12-17 1993-06-18 Bosch Gmbh Robert MOUNTING A CIRCUIT FOR CONTROLLING REST OPERATION OF A CONTROL DEVICE OF A MOTOR VEHICLE.
EP0725471A2 (en) * 1995-02-06 1996-08-07 Canon Kabushiki Kaisha Power supply apparatus
US11480937B2 (en) * 2016-11-21 2022-10-25 Pizzato Elettrica S.R.L. Safety switch with differentiated CPU

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59179431U (en) * 1983-05-17 1984-11-30 横河電機株式会社 Power outage detection circuit
JPS60140413A (en) * 1983-12-28 1985-07-25 Hitachi Maxell Ltd Memory backup circuit
JPH059812B2 (en) * 1983-12-28 1993-02-08 Hitachi Maxell
JPS62151633U (en) * 1986-03-12 1987-09-25
JPH0359800A (en) * 1989-07-28 1991-03-14 Hochiki Corp Alarm receiver
FR2685142A1 (en) * 1991-12-17 1993-06-18 Bosch Gmbh Robert MOUNTING A CIRCUIT FOR CONTROLLING REST OPERATION OF A CONTROL DEVICE OF A MOTOR VEHICLE.
EP0725471A2 (en) * 1995-02-06 1996-08-07 Canon Kabushiki Kaisha Power supply apparatus
EP0725471A3 (en) * 1995-02-06 1997-05-28 Canon Kk Power supply apparatus
US6045274A (en) * 1995-02-06 2000-04-04 Canon Kabushiki Kaisha Power supply apparatus
US11480937B2 (en) * 2016-11-21 2022-10-25 Pizzato Elettrica S.R.L. Safety switch with differentiated CPU

Also Published As

Publication number Publication date
JPS609285B2 (en) 1985-03-09

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