JPS5592920A - Keyboard unit - Google Patents

Keyboard unit

Info

Publication number
JPS5592920A
JPS5592920A JP16239778A JP16239778A JPS5592920A JP S5592920 A JPS5592920 A JP S5592920A JP 16239778 A JP16239778 A JP 16239778A JP 16239778 A JP16239778 A JP 16239778A JP S5592920 A JPS5592920 A JP S5592920A
Authority
JP
Japan
Prior art keywords
circuit
key
signal
control
control circuit
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
JP16239778A
Other languages
Japanese (ja)
Inventor
Toshiro Sugawara
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 JP16239778A priority Critical patent/JPS5592920A/en
Publication of JPS5592920A publication Critical patent/JPS5592920A/en
Pending legal-status Critical Current

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  • Input From Keyboards Or The Like (AREA)

Abstract

PURPOSE: To put one of roll-over, lock-out and multi-keying inhibition systems of key input into effect by selecting one or some of a control circuit, scanning signal control circuit and single-push signal detection circuit by a selective signal generated by a switching selector circuit.
CONSTITUTION: Key-matrix circuit 4 with a key matrix operating corresponding to several key operations, scanning circuit 5 supplying a scanning signal to circuit 4, and switching selector circuit 6 generating a selective signal corresponding to a key input system are provided, in addition single-push signal detection circuit 8 detecting a key being depressed. Then, circuit 5 is brought under the control of scanning signal control circuit 9 and control circuit 7 stopping the operation of circuit 4 by a selective signal from circuit 6 and control circuit 9 controlling circuit 5 are controlled led to exercise selective operation control over one or some of circuits 4, 5 and 8, so that roll-over, lock-out and multi-keying inhibition systems in terms of key input will selectively be put into effect.
COPYRIGHT: (C)1980,JPO&Japio
JP16239778A 1978-12-29 1978-12-29 Keyboard unit Pending JPS5592920A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16239778A JPS5592920A (en) 1978-12-29 1978-12-29 Keyboard unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16239778A JPS5592920A (en) 1978-12-29 1978-12-29 Keyboard unit

Publications (1)

Publication Number Publication Date
JPS5592920A true JPS5592920A (en) 1980-07-14

Family

ID=15753807

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16239778A Pending JPS5592920A (en) 1978-12-29 1978-12-29 Keyboard unit

Country Status (1)

Country Link
JP (1) JPS5592920A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5890429U (en) * 1981-12-11 1983-06-18 株式会社リコー key input device
JPS58168136A (en) * 1982-03-29 1983-10-04 Fujitsu Ltd Keyboard controlling circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5890429U (en) * 1981-12-11 1983-06-18 株式会社リコー key input device
JPS58168136A (en) * 1982-03-29 1983-10-04 Fujitsu Ltd Keyboard controlling circuit

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