JPS5725024A - Resetting circuit of microcomputer - Google Patents

Resetting circuit of microcomputer

Info

Publication number
JPS5725024A
JPS5725024A JP9874680A JP9874680A JPS5725024A JP S5725024 A JPS5725024 A JP S5725024A JP 9874680 A JP9874680 A JP 9874680A JP 9874680 A JP9874680 A JP 9874680A JP S5725024 A JPS5725024 A JP S5725024A
Authority
JP
Japan
Prior art keywords
circuit
output
gate
microcomputer
becomes
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
JP9874680A
Other languages
Japanese (ja)
Other versions
JPS5840767B2 (en
Inventor
Katsuzo Sakai
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP55098746A priority Critical patent/JPS5840767B2/en
Publication of JPS5725024A publication Critical patent/JPS5725024A/en
Publication of JPS5840767B2 publication Critical patent/JPS5840767B2/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
    • G06F1/24—Resetting means

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Debugging And Monitoring (AREA)

Abstract

PURPOSE:To get rid of hang-up, by periodically applying a reset signal to a microcomputer, and always initializing the microcomputer, when there is no operation input in an input part. CONSTITUTION:An oscillating circuit 6 is a circuit for always triggering an FF 7 and 8 at a constant period, and the circuit consisting of an inverter gate 9, an integral network and a Schmitt gate 11 resets an output of the FF8 after a constant time has elapsed. In case when there is no key depression signal 5 from the keyboard to an input terminal S of the FF7, an output A of the FF7 which has been triggered by the circuit 6 is always ''H'', by which a reset signal being an output of the FF8 becomes ''L'' the moment it is triggered. This signal ''L'' passes through the gate 11 from the circuit 10 through the gate 9, becomes an output B after delay of a constant time, and is applied to a reset terminal R of the FF8. In this way, the reset signal 12 becomes ''H'', and hang-up of a computer is removed.
JP55098746A 1980-07-21 1980-07-21 Microcomputer reset circuit Expired JPS5840767B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55098746A JPS5840767B2 (en) 1980-07-21 1980-07-21 Microcomputer reset circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55098746A JPS5840767B2 (en) 1980-07-21 1980-07-21 Microcomputer reset circuit

Publications (2)

Publication Number Publication Date
JPS5725024A true JPS5725024A (en) 1982-02-09
JPS5840767B2 JPS5840767B2 (en) 1983-09-07

Family

ID=14228029

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55098746A Expired JPS5840767B2 (en) 1980-07-21 1980-07-21 Microcomputer reset circuit

Country Status (1)

Country Link
JP (1) JPS5840767B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6244329U (en) * 1985-09-03 1987-03-17
JPH05233894A (en) * 1983-10-08 1993-09-10 Dainippon Printing Co Ltd Method and device for processing ic card and ic card

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05233894A (en) * 1983-10-08 1993-09-10 Dainippon Printing Co Ltd Method and device for processing ic card and ic card
JPS6244329U (en) * 1985-09-03 1987-03-17
JPH0441379Y2 (en) * 1985-09-03 1992-09-29

Also Published As

Publication number Publication date
JPS5840767B2 (en) 1983-09-07

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