JPS57182864A - Minicomputer - Google Patents

Minicomputer

Info

Publication number
JPS57182864A
JPS57182864A JP56068000A JP6800081A JPS57182864A JP S57182864 A JPS57182864 A JP S57182864A JP 56068000 A JP56068000 A JP 56068000A JP 6800081 A JP6800081 A JP 6800081A JP S57182864 A JPS57182864 A JP S57182864A
Authority
JP
Japan
Prior art keywords
lsi
common electrode
keyboard
input
signal
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
JP56068000A
Other languages
Japanese (ja)
Inventor
Yoshikiyo Futagawa
Original Assignee
Seiko Epson Corp
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 Seiko Epson Corp filed Critical Seiko Epson Corp
Priority to JP56068000A priority Critical patent/JPS57182864A/en
Publication of JPS57182864A publication Critical patent/JPS57182864A/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F15/00Digital computers in general; Data processing equipment in general
    • G06F15/02Digital computers in general; Data processing equipment in general manually operated with input through keyboard and computation using a built-in program, e.g. pocket calculators

Abstract

PURPOSE:To reduce the number of input and output terminals of an LSI and internal circuits and to reduce the cost, by using a common electrode signal of the display device consisting of passive elements as an input signal of a keyboard. CONSTITUTION:Common electrode signals of a display device 2 are used as inputs of a keyboard 7. Lighting or non-lighting signals are applied to segment electrodes in accordance with these common electrode signals, and what is called voltage averaging is performed for passive elements to perform multiplex driving. Thus, the number of input and output terminals of an LSI 11 to discharge a periodic signal, and buffers in the LSI are reduced, and the cost of the LSI is reduced, and the complicated periodic signal is accepted as keyboard information with a very simple circuit.
JP56068000A 1981-05-06 1981-05-06 Minicomputer Pending JPS57182864A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56068000A JPS57182864A (en) 1981-05-06 1981-05-06 Minicomputer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56068000A JPS57182864A (en) 1981-05-06 1981-05-06 Minicomputer

Publications (1)

Publication Number Publication Date
JPS57182864A true JPS57182864A (en) 1982-11-10

Family

ID=13361181

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56068000A Pending JPS57182864A (en) 1981-05-06 1981-05-06 Minicomputer

Country Status (1)

Country Link
JP (1) JPS57182864A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62153996A (en) * 1985-12-27 1987-07-08 Nippon Musical Instruments Mfg Panel unit for electronic musical apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62153996A (en) * 1985-12-27 1987-07-08 Nippon Musical Instruments Mfg Panel unit for electronic musical apparatus

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