JPS56153434A - Contact detecting circuit for keyboard - Google Patents

Contact detecting circuit for keyboard

Info

Publication number
JPS56153434A
JPS56153434A JP5732380A JP5732380A JPS56153434A JP S56153434 A JPS56153434 A JP S56153434A JP 5732380 A JP5732380 A JP 5732380A JP 5732380 A JP5732380 A JP 5732380A JP S56153434 A JPS56153434 A JP S56153434A
Authority
JP
Japan
Prior art keywords
signal
pulse generator
detection
pulse
time
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
JP5732380A
Other languages
Japanese (ja)
Other versions
JPS6243209B2 (en
Inventor
Yukio Sakano
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.)
Ricoh Co Ltd
Original Assignee
Ricoh 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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP5732380A priority Critical patent/JPS56153434A/en
Publication of JPS56153434A publication Critical patent/JPS56153434A/en
Publication of JPS6243209B2 publication Critical patent/JPS6243209B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/02—Input arrangements using manually operated switches, e.g. using keyboards or dials
    • G06F3/023—Arrangements for converting discrete items of information into a coded form, e.g. arrangements for interpreting keyboard generated codes as alphanumeric codes, operand codes or instruction codes

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Input From Keyboards Or The Like (AREA)

Abstract

PURPOSE:To arrange the circuit so that one detection signal is produced slower than the other detection signal in such a manner as to vary the time for generation of the detection signals of rows and lines and as to generate set pulses and strobe signals based on the OR output signal thereof. CONSTITUTION:When a detection signal is generated in any of contacts Y1-0- Yn-0 based on key operation, an input signal is applied to a pulse generator 3. The pulse generator 3 generates a set pulse SP after lapse of the preset time T3 from the timing at which the input signal is applied thereto. At this point of time, the detection signals generating at the connection points X1-0, Y1-0 are set respectively in temporary memory devices 1, 2. The set pulse SP is applied to a pulse generator 4, and the pulse generator 4 generates a strobe signal STB after the preset time T4. By this signal, the data of the devices 1, 2 are read out.
JP5732380A 1980-04-30 1980-04-30 Contact detecting circuit for keyboard Granted JPS56153434A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5732380A JPS56153434A (en) 1980-04-30 1980-04-30 Contact detecting circuit for keyboard

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5732380A JPS56153434A (en) 1980-04-30 1980-04-30 Contact detecting circuit for keyboard

Publications (2)

Publication Number Publication Date
JPS56153434A true JPS56153434A (en) 1981-11-27
JPS6243209B2 JPS6243209B2 (en) 1987-09-11

Family

ID=13052363

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5732380A Granted JPS56153434A (en) 1980-04-30 1980-04-30 Contact detecting circuit for keyboard

Country Status (1)

Country Link
JP (1) JPS56153434A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6312223U (en) * 1986-07-08 1988-01-27
JP2007137468A (en) * 2005-11-17 2007-06-07 Sadao Hachiman Heat insulation expressing adhesive label

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11130263A (en) * 1997-10-27 1999-05-18 Yaskawa Electric Corp Loading pattern preparation

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6312223U (en) * 1986-07-08 1988-01-27
JP2007137468A (en) * 2005-11-17 2007-06-07 Sadao Hachiman Heat insulation expressing adhesive label

Also Published As

Publication number Publication date
JPS6243209B2 (en) 1987-09-11

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