JPS5781631A - Power off method for electronic apparatus - Google Patents

Power off method for electronic apparatus

Info

Publication number
JPS5781631A
JPS5781631A JP55156984A JP15698480A JPS5781631A JP S5781631 A JPS5781631 A JP S5781631A JP 55156984 A JP55156984 A JP 55156984A JP 15698480 A JP15698480 A JP 15698480A JP S5781631 A JPS5781631 A JP S5781631A
Authority
JP
Japan
Prior art keywords
power
power source
microcomputer
turned
output
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
JP55156984A
Other languages
Japanese (ja)
Inventor
Shigeo Kurachi
Noriaki Fujita
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.)
Ricoh Co Ltd
Original Assignee
Ricoh 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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP55156984A priority Critical patent/JPS5781631A/en
Publication of JPS5781631A publication Critical patent/JPS5781631A/en
Pending 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
    • G06F1/24—Resetting means

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Power Sources (AREA)

Abstract

PURPOSE:To eliminate the variance of the time from the power off operation to the actual power off and shorten this time, by inputting a power off signal to a reset terminal of the unconditional interruption of a microcomputer. CONSTITUTION:A feeder 3 connecting a power source 1 and a power source circuit 4 of an apparatus is cut off through a solid state relay (SSR)5. The SSR5 is turned off when an input trigger ST is high-level ''H''. When a power source switch 7 is turned off, the S terminal of a flip flop (FF) 10 is set to ''L'' from a switch 7b, and the output Q is set to ''H'', and this power off signal is inputted to a reset terminal R of a microcomputer 12 through an inverter 16 and a gate 17 from a monostable multivibrator 15 triggerred by the rise of the output Q. The microcomputer 12 interrupts the normal operation and performs the close processing to set an FF14, and the output Q' makes the trigger ST high-level through a gate 9 and an SSR drive circuit 8, and the power source is turned off by the SSR5.
JP55156984A 1980-11-10 1980-11-10 Power off method for electronic apparatus Pending JPS5781631A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55156984A JPS5781631A (en) 1980-11-10 1980-11-10 Power off method for electronic apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55156984A JPS5781631A (en) 1980-11-10 1980-11-10 Power off method for electronic apparatus

Publications (1)

Publication Number Publication Date
JPS5781631A true JPS5781631A (en) 1982-05-21

Family

ID=15639623

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55156984A Pending JPS5781631A (en) 1980-11-10 1980-11-10 Power off method for electronic apparatus

Country Status (1)

Country Link
JP (1) JPS5781631A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6348231U (en) * 1986-09-12 1988-04-01

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5299020A (en) * 1976-02-17 1977-08-19 Casio Comput Co Ltd Power supply breaking system for electronic device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5299020A (en) * 1976-02-17 1977-08-19 Casio Comput Co Ltd Power supply breaking system for electronic device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6348231U (en) * 1986-09-12 1988-04-01
JPH057631Y2 (en) * 1986-09-12 1993-02-25

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