JPS5682923A - Automatic power source disconnection device - Google Patents

Automatic power source disconnection device

Info

Publication number
JPS5682923A
JPS5682923A JP15896179A JP15896179A JPS5682923A JP S5682923 A JPS5682923 A JP S5682923A JP 15896179 A JP15896179 A JP 15896179A JP 15896179 A JP15896179 A JP 15896179A JP S5682923 A JPS5682923 A JP S5682923A
Authority
JP
Japan
Prior art keywords
circuit
power source
cpu2
time
initial value
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
JP15896179A
Other languages
Japanese (ja)
Inventor
Tetsuji 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.)
Casio Computer Co Ltd
Original Assignee
Casio Computer 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 Casio Computer Co Ltd filed Critical Casio Computer Co Ltd
Priority to JP15896179A priority Critical patent/JPS5682923A/en
Publication of JPS5682923A publication Critical patent/JPS5682923A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To inhibit an electric power source from being disconnected until the processing of CPU ends, by discriminating the operation state of CPU when a set- time elapsed signal from a timer circuit or power source disconnection command from keyboard KB is inputted.
CONSTITUTION: In latch circuit 5, an initial value showing automatic power source disconnection intervals is initially set from CPU2 when the power source is put to work. Every time the key operation of KB1 is performed, key stroke signal KS is sent to timer circuit 3, which loads the initial value, held in circuit 5, into a counter, so that the counter substracts synchronizing with clock CLK. When an input from KB1 arrives before the counter counts down to zero, the initial value in circuit 5 is loaded into circuit 3 at each time and clocking operation is initialized and restarted. As the set time of circuit 3 passes, borrow signal BRW is outputted to discriminating circuit 4. Circuit 4 discriminates the operation state of CPU2; when CPU2 is in operation, the operation of power-off control part 9 is inhibited and on the completion of the operation of CPU, control part 9 is put into operation to disconnect the power source.
COPYRIGHT: (C)1981,JPO&Japio
JP15896179A 1979-12-07 1979-12-07 Automatic power source disconnection device Pending JPS5682923A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15896179A JPS5682923A (en) 1979-12-07 1979-12-07 Automatic power source disconnection device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15896179A JPS5682923A (en) 1979-12-07 1979-12-07 Automatic power source disconnection device

Publications (1)

Publication Number Publication Date
JPS5682923A true JPS5682923A (en) 1981-07-07

Family

ID=15683128

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15896179A Pending JPS5682923A (en) 1979-12-07 1979-12-07 Automatic power source disconnection device

Country Status (1)

Country Link
JP (1) JPS5682923A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5960524A (en) * 1982-09-29 1984-04-06 Toshiba Corp Automatic power source cutoff device
JPS59170920A (en) * 1983-03-17 1984-09-27 Fujitsu Ltd Method for controlling disconnection of power supply
JPS6256956A (en) * 1985-09-06 1987-03-12 Fujitsu Ltd Production of heat resistant insulating pattern
US6108792A (en) * 1988-09-06 2000-08-22 Seiko Epson Corporation Article for providing continuity of operation in a computer

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5960524A (en) * 1982-09-29 1984-04-06 Toshiba Corp Automatic power source cutoff device
JPS59170920A (en) * 1983-03-17 1984-09-27 Fujitsu Ltd Method for controlling disconnection of power supply
JPS6256956A (en) * 1985-09-06 1987-03-12 Fujitsu Ltd Production of heat resistant insulating pattern
US6108792A (en) * 1988-09-06 2000-08-22 Seiko Epson Corporation Article for providing continuity of operation in a computer

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