JPS57191732A - Key input device - Google Patents

Key input device

Info

Publication number
JPS57191732A
JPS57191732A JP56074920A JP7492081A JPS57191732A JP S57191732 A JPS57191732 A JP S57191732A JP 56074920 A JP56074920 A JP 56074920A JP 7492081 A JP7492081 A JP 7492081A JP S57191732 A JPS57191732 A JP S57191732A
Authority
JP
Japan
Prior art keywords
code
bsp
key
circuit
mark
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
JP56074920A
Other languages
Japanese (ja)
Other versions
JPS611763B2 (en
Inventor
Fuminori Naito
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 JP56074920A priority Critical patent/JPS57191732A/en
Publication of JPS57191732A publication Critical patent/JPS57191732A/en
Publication of JPS611763B2 publication Critical patent/JPS611763B2/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)
  • Document Processing Apparatus (AREA)

Abstract

PURPOSE:To reduce the number of parts, by using a BSP code circuit as a general key code generating circuit also and generating a strobe pulse automatically without depression of a BSP key when an additional mark is detected. CONSTITUTION:In a key input device where characters with additional marks such as umlaut and circumflex accent are inputted, when a character with said mark is inputted, it is necessary that the additional mark code is outputted together with the back space (BSP) code besides the character code and is processed. A BSP code generating circuit is used as a general key code generating circuit also; and when an encoder 11 detects said mark, the output of a monostable multivibrator circuit 13 becomes as shown in figure (d), and a monostable multivibrator circuit 14 is operated, and a pulse shown in figure (e) is generated to close a back space key 10 of a matrix circuit, and a strobe pulse is generated similarly to depression of the BSP key by this closing.
JP56074920A 1981-05-20 1981-05-20 Key input device Granted JPS57191732A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56074920A JPS57191732A (en) 1981-05-20 1981-05-20 Key input device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56074920A JPS57191732A (en) 1981-05-20 1981-05-20 Key input device

Publications (2)

Publication Number Publication Date
JPS57191732A true JPS57191732A (en) 1982-11-25
JPS611763B2 JPS611763B2 (en) 1986-01-20

Family

ID=13561292

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56074920A Granted JPS57191732A (en) 1981-05-20 1981-05-20 Key input device

Country Status (1)

Country Link
JP (1) JPS57191732A (en)

Also Published As

Publication number Publication date
JPS611763B2 (en) 1986-01-20

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