JPS5592920A - Keyboard unit - Google Patents
Keyboard unitInfo
- 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
Links
Landscapes
- 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
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)
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 |
-
1978
- 1978-12-29 JP JP16239778A patent/JPS5592920A/en active Pending
Cited By (2)
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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