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JPS5530755A - Malfunction prevention system for small size electronic calculator - Google Patents

Malfunction prevention system for small size electronic calculator

Info

Publication number
JPS5530755A
JPS5530755A JP10326378A JP10326378A JPS5530755A JP S5530755 A JPS5530755 A JP S5530755A JP 10326378 A JP10326378 A JP 10326378A JP 10326378 A JP10326378 A JP 10326378A JP S5530755 A JPS5530755 A JP S5530755A
Authority
JP
Japan
Prior art keywords
power
state
signal
control circuit
electronic calculator
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
JP10326378A
Other languages
Japanese (ja)
Inventor
Toshifumi Hoshii
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 JP10326378A priority Critical patent/JPS5530755A/en
Publication of JPS5530755A publication Critical patent/JPS5530755A/en
Pending legal-status Critical Current

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  • Calculators And Similar Devices (AREA)

Abstract

PURPOSE: To avoid the useless power consumption, by correctly and immediately detecting failure and enabling the restoration of automatic power OFF state quickly and surely, when the automatic power OFF state is released abnormally with a cause such as noise occurrence.
CONSTITUTION: When the power switch 17 is turned on to enable the electronic calculator for the computation and the input signal from the key input section 14 is not inputted over a given time, FF provided with the control circuit 16 is reset to stop the operation of the oscillation circuit 18 and to set the automatic power OFF state. Further, after the power OFF state is set, the control signal discriminating the release of this power OFF state with an abnormal signal is produced from the operation section 13, this control signal is inputted to the ROM address section 15 to output the power OFF signal APO from the address section 15 to the control circuit 16. Further, when the control circuit 16 judges the release of power OFF state, the signal APO resets FF and power OFF state is quickly restored.
COPYRIGHT: (C)1980,JPO&Japio
JP10326378A 1978-08-24 1978-08-24 Malfunction prevention system for small size electronic calculator Pending JPS5530755A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10326378A JPS5530755A (en) 1978-08-24 1978-08-24 Malfunction prevention system for small size electronic calculator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10326378A JPS5530755A (en) 1978-08-24 1978-08-24 Malfunction prevention system for small size electronic calculator

Publications (1)

Publication Number Publication Date
JPS5530755A true JPS5530755A (en) 1980-03-04

Family

ID=14349540

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10326378A Pending JPS5530755A (en) 1978-08-24 1978-08-24 Malfunction prevention system for small size electronic calculator

Country Status (1)

Country Link
JP (1) JPS5530755A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03205947A (en) * 1990-05-23 1991-09-09 Sanyo Electric Co Ltd Cordless telephone system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03205947A (en) * 1990-05-23 1991-09-09 Sanyo Electric Co Ltd Cordless telephone system
JPH048984B2 (en) * 1990-05-23 1992-02-18

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