JPS573130A - Keyboard input circuit - Google Patents

Keyboard input circuit

Info

Publication number
JPS573130A
JPS573130A JP7552480A JP7552480A JPS573130A JP S573130 A JPS573130 A JP S573130A JP 7552480 A JP7552480 A JP 7552480A JP 7552480 A JP7552480 A JP 7552480A JP S573130 A JPS573130 A JP S573130A
Authority
JP
Japan
Prior art keywords
counter
circuit
key
signal
stopped
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
JP7552480A
Other languages
Japanese (ja)
Other versions
JPS6059606B2 (en
Inventor
Mikiaki Kobayashi
Kunihiko Nagai
Takuo Koyama
Tsuguji Tateuchi
Shigeru Hirahata
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 JP55075524A priority Critical patent/JPS6059606B2/en
Publication of JPS573130A publication Critical patent/JPS573130A/en
Publication of JPS6059606B2 publication Critical patent/JPS6059606B2/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M11/00—Coding in connection with keyboards or like devices, i.e. coding of the position of operated keys
    • H03M11/20—Dynamic coding, i.e. by key scanning

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Input From Keyboards Or The Like (AREA)

Abstract

PURPOSE:To set a specific key input mode and an all key input mode selectively, by giving a set signal to one of two counters by a key scanning stop circuit to scan only partial specific keys. CONSTITUTION:Clock pulses from an oscillating circuit 2 are counted by an X counter 3. A Y counter 4 is reset by a key scanning stop circuit 13 and is stopped in the position. Thus, even if the X counter 3 becomes a full count to issue a carry out output 11 of the carry signal, the output of the Y counte 4 is fixed. When a key switch in the position where the X-direction line started by an X decoder 5 and the connection line of a Y multiplexer 6 intersect each other is depressed, a coincidence signal 10 is outputted. Oscillation of the oscillator 2 is stopped by the coincidence signal 10, and outputs of the X counter 3 and the Y counter 4 at this time are stored in a storage circuit 7 and are converted by a converting circuit 8.
JP55075524A 1980-06-06 1980-06-06 keyboard input circuit Expired JPS6059606B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55075524A JPS6059606B2 (en) 1980-06-06 1980-06-06 keyboard input circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55075524A JPS6059606B2 (en) 1980-06-06 1980-06-06 keyboard input circuit

Publications (2)

Publication Number Publication Date
JPS573130A true JPS573130A (en) 1982-01-08
JPS6059606B2 JPS6059606B2 (en) 1985-12-26

Family

ID=13578698

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55075524A Expired JPS6059606B2 (en) 1980-06-06 1980-06-06 keyboard input circuit

Country Status (1)

Country Link
JP (1) JPS6059606B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63308626A (en) * 1987-06-10 1988-12-16 Brother Ind Ltd Matrix switch input detector
EP0471448A2 (en) * 1990-08-08 1992-02-19 Advanced Micro Devices, Inc. Programmable keyboard monitor
JP2016184240A (en) * 2015-03-25 2016-10-20 富士通株式会社 Keyboard input imitation method and keyboard

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01220902A (en) * 1988-02-29 1989-09-04 Hitachi Ltd Structure of antenna

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63308626A (en) * 1987-06-10 1988-12-16 Brother Ind Ltd Matrix switch input detector
EP0471448A2 (en) * 1990-08-08 1992-02-19 Advanced Micro Devices, Inc. Programmable keyboard monitor
JP2016184240A (en) * 2015-03-25 2016-10-20 富士通株式会社 Keyboard input imitation method and keyboard

Also Published As

Publication number Publication date
JPS6059606B2 (en) 1985-12-26

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