JPS5624633A - Key input control system - Google Patents
Key input control systemInfo
- Publication number
- JPS5624633A JPS5624633A JP9957079A JP9957079A JPS5624633A JP S5624633 A JPS5624633 A JP S5624633A JP 9957079 A JP9957079 A JP 9957079A JP 9957079 A JP9957079 A JP 9957079A JP S5624633 A JPS5624633 A JP S5624633A
- Authority
- JP
- Japan
- Prior art keywords
- cpu13
- key
- circuit
- output
- transferred
- 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
Abstract
PURPOSE: To prevent the chattering simply and effectively by forming the construction for indicating the input permission only when the key switch action detecting signal is not present and the key input information detecting signal is present.
CONSTITUTION: The output of OR circuit 2 (key switch action detection signal) is transferred to CPU13 practicing the control processing and predetermined operation in accordance with the key input information generated from the key device 1, and further the respective output of FF group 3 is transferred to OR circuit 4 and CPU13. CPU13 decodes the key input information of FF group 3 and practices based on the key function. In addition, the output of the circuit 4 (key input information detection signal) is also transferred to CPU13. Every time the timing signal 14 is transferred, CPU13 judge the input signals from the circuits 2 and 4 and operates the contents of the counter 15. For example, in the case where the output of the circuit 2 is "0", and the output of the circuit 4 is "1", the device portion 1 of the key is electrically separated, so that the CPU13 counts up the contents of the counter 15.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9957079A JPS5624633A (en) | 1979-08-03 | 1979-08-03 | Key input control system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9957079A JPS5624633A (en) | 1979-08-03 | 1979-08-03 | Key input control system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5624633A true JPS5624633A (en) | 1981-03-09 |
Family
ID=14250773
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9957079A Pending JPS5624633A (en) | 1979-08-03 | 1979-08-03 | Key input control system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5624633A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57161921A (en) * | 1981-03-31 | 1982-10-05 | Fuji Electric Co Ltd | Signal processing system |
JPS58109918A (en) * | 1981-12-23 | 1983-06-30 | Hitachi Ltd | Signal fetch device |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5478004A (en) * | 1977-12-02 | 1979-06-21 | Nippon Telegr & Teleph Corp <Ntt> | Switch circuit of push-button dial telephone set |
-
1979
- 1979-08-03 JP JP9957079A patent/JPS5624633A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5478004A (en) * | 1977-12-02 | 1979-06-21 | Nippon Telegr & Teleph Corp <Ntt> | Switch circuit of push-button dial telephone set |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57161921A (en) * | 1981-03-31 | 1982-10-05 | Fuji Electric Co Ltd | Signal processing system |
JPS58109918A (en) * | 1981-12-23 | 1983-06-30 | Hitachi Ltd | Signal fetch device |
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