JPS5743223A - Keyboard control system - Google Patents

Keyboard control system

Info

Publication number
JPS5743223A
JPS5743223A JP55118407A JP11840780A JPS5743223A JP S5743223 A JPS5743223 A JP S5743223A JP 55118407 A JP55118407 A JP 55118407A JP 11840780 A JP11840780 A JP 11840780A JP S5743223 A JPS5743223 A JP S5743223A
Authority
JP
Japan
Prior art keywords
keyboard
information
address
data
address information
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.)
Pending
Application number
JP55118407A
Other languages
Japanese (ja)
Inventor
Masaru Yasunaga
Akihiko Iura
Masayuki Azuma
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 JP55118407A priority Critical patent/JPS5743223A/en
Publication of JPS5743223A publication Critical patent/JPS5743223A/en
Pending 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 simplify the hardware, by decoding the address information for the keyboard arranged in matrix. CONSTITUTION:The address information in 16 bits (A0-A15) outputted from a microprocessor 32 via an address bus 34 includes a keyboard memory or key switch scanning information in addition to other information, this is decoded by an address decoder 36 and each line of a key switch 30 is sequentially scanned. The selection of the keyboard is made by taking the product at a gate 40, after inverting signals of the address information A8-A15. The data appeared on each row is inputted to the microprocessor via a data bus 38 corresponding to the data bits D4-D7.
JP55118407A 1980-08-29 1980-08-29 Keyboard control system Pending JPS5743223A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55118407A JPS5743223A (en) 1980-08-29 1980-08-29 Keyboard control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55118407A JPS5743223A (en) 1980-08-29 1980-08-29 Keyboard control system

Publications (1)

Publication Number Publication Date
JPS5743223A true JPS5743223A (en) 1982-03-11

Family

ID=14735875

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55118407A Pending JPS5743223A (en) 1980-08-29 1980-08-29 Keyboard control system

Country Status (1)

Country Link
JP (1) JPS5743223A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61111663A (en) * 1984-11-06 1986-05-29 Tetsuya Sawaki Preparation of pasta shell stuffed with dried ingredient

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61111663A (en) * 1984-11-06 1986-05-29 Tetsuya Sawaki Preparation of pasta shell stuffed with dried ingredient

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