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JPS5688517A - Output controller of microcomputer - Google Patents

Output controller of microcomputer

Info

Publication number
JPS5688517A
JPS5688517A JP16639479A JP16639479A JPS5688517A JP S5688517 A JPS5688517 A JP S5688517A JP 16639479 A JP16639479 A JP 16639479A JP 16639479 A JP16639479 A JP 16639479A JP S5688517 A JPS5688517 A JP S5688517A
Authority
JP
Japan
Prior art keywords
voltage
com
terminal
reset
prescribed
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
JP16639479A
Other languages
Japanese (ja)
Inventor
Norizo Nagata
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.)
Minolta Co Ltd
Original Assignee
Minolta 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 Minolta Co Ltd filed Critical Minolta Co Ltd
Priority to JP16639479A priority Critical patent/JPS5688517A/en
Publication of JPS5688517A publication Critical patent/JPS5688517A/en
Pending legal-status Critical Current

Links

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  • Electronic Switches (AREA)
  • Power Sources (AREA)

Abstract

PURPOSE: To prevent securely microcomputer COM from malfunctioning when a voltage is unstable, by applying a prescribed resetting voltage to COM before the voltage supplied to COM enters into the unstable operation region of COM.
CONSTITUTION: With a power switch turned on, a rectifying-smoothing capacitor is charged and as the voltage at DC voltage terminal DC rises, capacitor C2 is charged to input the voltage between the capacitor C2 and resistance R7 to reset terminal IR of COM. When the voltage at terminal IR rises up to a reset level, COM is reset and set in its initial state and its operation is stopped until the reset input is released. The voltage at terminal DC is placed in a prescribed stable state and then the voltage at terminal IR drops below a prescribed level, releasing the reset state of COM. With the power switch turned off, the smoothing capacitor is discharged to reduce the voltage at terminal DC and before it drops below the stable operating voltage of COM, Zener diode ZD2 is turned off to turn on transistor Q4. Thus, C2 is discharged to apply a resetting voltage to terminal IR, stopping the operation of COM.
COPYRIGHT: (C)1981,JPO&Japio
JP16639479A 1979-12-20 1979-12-20 Output controller of microcomputer Pending JPS5688517A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16639479A JPS5688517A (en) 1979-12-20 1979-12-20 Output controller of microcomputer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16639479A JPS5688517A (en) 1979-12-20 1979-12-20 Output controller of microcomputer

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP61302662A Division JPS62162124A (en) 1986-12-18 1986-12-18 Output controlling device for microcomputer

Publications (1)

Publication Number Publication Date
JPS5688517A true JPS5688517A (en) 1981-07-18

Family

ID=15830596

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16639479A Pending JPS5688517A (en) 1979-12-20 1979-12-20 Output controller of microcomputer

Country Status (1)

Country Link
JP (1) JPS5688517A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6440924U (en) * 1987-09-07 1989-03-10
JPH04108223U (en) * 1991-02-28 1992-09-18 株式会社カンセイ reset circuit

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5229121A (en) * 1975-08-30 1977-03-04 Toshiba Corp False motion prevention circuit when putting on and off of logical cir cuit and so on

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5229121A (en) * 1975-08-30 1977-03-04 Toshiba Corp False motion prevention circuit when putting on and off of logical cir cuit and so on

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6440924U (en) * 1987-09-07 1989-03-10
JPH04108223U (en) * 1991-02-28 1992-09-18 株式会社カンセイ reset circuit

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