JPS5690331A - Keyboard processing system - Google Patents
Keyboard processing systemInfo
- Publication number
- JPS5690331A JPS5690331A JP16776179A JP16776179A JPS5690331A JP S5690331 A JPS5690331 A JP S5690331A JP 16776179 A JP16776179 A JP 16776179A JP 16776179 A JP16776179 A JP 16776179A JP S5690331 A JPS5690331 A JP S5690331A
- Authority
- JP
- Japan
- Prior art keywords
- matrix
- key
- processor
- counting value
- code
- 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 make a complicated logical circuit unnecessary and simplify the equipment, by scanning the matrix by simple hardware, and executing the code conversion of the key code which has been read by scanning the matrix, by means of the firmware processing of the processor.
CONSTITUTION: The respective key switches constituting the key matrix 1 are made to have the prescribed key codes, respectively, the decoder 2 is controlled by the counting value of the prescribed bit from the oscillating circuit 8 of the counter 3, and the input lines #0W#7 in the line direction of the matrix 1 are scanned in order. Also, the selector 4 for selecting the output of the output signal lines #0W#7 of the matrix 1 is selectively scanned by the counting value of the counter 5, and the keyboard status is provided to the processor 6 and the inhibiting gate 7. Also, the counting value of the counters 3, 5 is provided to the A register as a key code, the code conversion of the key code is executed in accordance with the keyboard processing routine of the storage device, by the processor, and the device can be simplified.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16776179A JPS5690331A (en) | 1979-12-24 | 1979-12-24 | Keyboard processing system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16776179A JPS5690331A (en) | 1979-12-24 | 1979-12-24 | Keyboard processing system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5690331A true JPS5690331A (en) | 1981-07-22 |
Family
ID=15855597
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16776179A Pending JPS5690331A (en) | 1979-12-24 | 1979-12-24 | Keyboard processing system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5690331A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58221429A (en) * | 1982-06-16 | 1983-12-23 | Toshiba Corp | Method for controlling repeat in keyboard |
US4591833A (en) * | 1981-08-13 | 1986-05-27 | Tokyo Shibaura Denki Kabushiki Kaisha | Keyboard unit control system using block scanning techniques |
-
1979
- 1979-12-24 JP JP16776179A patent/JPS5690331A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4591833A (en) * | 1981-08-13 | 1986-05-27 | Tokyo Shibaura Denki Kabushiki Kaisha | Keyboard unit control system using block scanning techniques |
JPS58221429A (en) * | 1982-06-16 | 1983-12-23 | Toshiba Corp | Method for controlling repeat in keyboard |
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