JPS57159328A - Keyboard discriminating system - Google Patents

Keyboard discriminating system

Info

Publication number
JPS57159328A
JPS57159328A JP56045095A JP4509581A JPS57159328A JP S57159328 A JPS57159328 A JP S57159328A JP 56045095 A JP56045095 A JP 56045095A JP 4509581 A JP4509581 A JP 4509581A JP S57159328 A JPS57159328 A JP S57159328A
Authority
JP
Japan
Prior art keywords
keyboard
signal
key
count value
types
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
JP56045095A
Other languages
Japanese (ja)
Other versions
JPH0313610B2 (en
Inventor
Kunihiko Hakamazuka
Masami Yamamoto
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP56045095A priority Critical patent/JPS57159328A/en
Publication of JPS57159328A publication Critical patent/JPS57159328A/en
Publication of JPH0313610B2 publication Critical patent/JPH0313610B2/ja
Granted 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
    • H03M11/02—Details

Landscapes

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

Abstract

PURPOSE:To eliminate the need for the hardware setting conditions indicating types to a controller side and to prevent misconnection, by providing a means for setting a signal indicating the types of a keyboard at a keyboard unit side. CONSTITUTION:Output terminals A-D of a decoder 5 are sequentially selected with an output of a counter 3. A count value Y being the output of the counter 3 is set to a register 41. When a key is depressed, an orthogonal point of a key matrix F is conductive and key data X is set to a register 42. A keyboard signal A is transmitted to a control section 8 by depressing the key. Similarly, a keyboard signal B from a keyboard 7 also reaches the control section 8. A discriminating section 9 can discriminate the types of keyboard, by distinguishing the key data Xa of a count value Ya of the signal A from the key data Xb of a count value Yb of the signal B. Thus, a character C by keyboards 1 and 7 can be picked up from a character data section 10 and this is transmitted to a processing section 11.
JP56045095A 1981-03-27 1981-03-27 Keyboard discriminating system Granted JPS57159328A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56045095A JPS57159328A (en) 1981-03-27 1981-03-27 Keyboard discriminating system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56045095A JPS57159328A (en) 1981-03-27 1981-03-27 Keyboard discriminating system

Publications (2)

Publication Number Publication Date
JPS57159328A true JPS57159328A (en) 1982-10-01
JPH0313610B2 JPH0313610B2 (en) 1991-02-22

Family

ID=12709740

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56045095A Granted JPS57159328A (en) 1981-03-27 1981-03-27 Keyboard discriminating system

Country Status (1)

Country Link
JP (1) JPS57159328A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5966735A (en) * 1982-10-08 1984-04-16 Hitachi Ltd Word processor
JPS59163626A (en) * 1983-03-07 1984-09-14 Sanyo Electric Co Ltd Keyboard identifying system
JPS61101193A (en) * 1984-10-24 1986-05-20 Matsushita Electric Ind Co Ltd Key telephone system
JPS62201485U (en) * 1986-06-13 1987-12-22
US5101429A (en) * 1989-04-24 1992-03-31 U.S. Philips Corporation Electronic telephone set
US5631643A (en) * 1994-07-20 1997-05-20 Fujitsu Limited Key-code outputting apparatus for data processor having an interchangeable keyboard

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56155437A (en) * 1980-05-02 1981-12-01 Nec Corp Key code reading circuit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56155437A (en) * 1980-05-02 1981-12-01 Nec Corp Key code reading circuit

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5966735A (en) * 1982-10-08 1984-04-16 Hitachi Ltd Word processor
JPS59163626A (en) * 1983-03-07 1984-09-14 Sanyo Electric Co Ltd Keyboard identifying system
JPH0210964B2 (en) * 1983-03-07 1990-03-12 Sanyo Electric Co
JPS61101193A (en) * 1984-10-24 1986-05-20 Matsushita Electric Ind Co Ltd Key telephone system
JPS62201485U (en) * 1986-06-13 1987-12-22
US5101429A (en) * 1989-04-24 1992-03-31 U.S. Philips Corporation Electronic telephone set
US5631643A (en) * 1994-07-20 1997-05-20 Fujitsu Limited Key-code outputting apparatus for data processor having an interchangeable keyboard

Also Published As

Publication number Publication date
JPH0313610B2 (en) 1991-02-22

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