JPS58101235U - keyboard encoder - Google Patents
keyboard encoderInfo
- Publication number
- JPS58101235U JPS58101235U JP19304281U JP19304281U JPS58101235U JP S58101235 U JPS58101235 U JP S58101235U JP 19304281 U JP19304281 U JP 19304281U JP 19304281 U JP19304281 U JP 19304281U JP S58101235 U JPS58101235 U JP S58101235U
- Authority
- JP
- Japan
- Prior art keywords
- keyboard encoder
- key
- keyboard
- abstract
- keys
- 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
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は従来のキーマトリクスを説明するための図、第
２図はキーマトリクスの３キ一押下時の回り込みを説明
するための図、第３図は本考案によるキーボードエンコ
ーダの回路を説明するための回路図である。
図面に於いて、２はキーマトリクス、３はマルチプレク
サ、４はデコーダ、５はキースキャン用カウンタ、６は
押下キー計数用カウンタ、７はフリップフロップ回路、
８はディレィ及びストローブ発生回路をそれぞれ示す。Fig. 1 is a diagram for explaining a conventional key matrix, Fig. 2 is a diagram for explaining wraparound when three keys of the key matrix are pressed, and Fig. 3 is a diagram for explaining the circuit of the keyboard encoder according to the present invention. FIG. In the drawing, 2 is a key matrix, 3 is a multiplexer, 4 is a decoder, 5 is a key scan counter, 6 is a counter for counting pressed keys, 7 is a flip-flop circuit,
8 indicates a delay and strobe generation circuit, respectively.
Claims (1)
したコードを送出するキーボードエンコーダにおいて、
３キ一以上の同時押下があった場合にコードの送出を禁
止する機能をもったことを特徴とするキーボードエンコ
ーダ。In a keyboard encoder that sends a code corresponding to each key by pressing a key in a key matrix,
A keyboard encoder characterized by having a function of prohibiting code transmission when three or more keys are pressed simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19304281U JPS58101235U (en) | 1981-12-28 | 1981-12-28 | keyboard encoder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19304281U JPS58101235U (en) | 1981-12-28 | 1981-12-28 | keyboard encoder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58101235U true JPS58101235U (en) | 1983-07-09 |
Family
ID=30106416
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19304281U Pending JPS58101235U (en) | 1981-12-28 | 1981-12-28 | keyboard encoder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58101235U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61143829A (en) * | 1984-12-14 | 1986-07-01 | Canon Inc | Keyboard device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54122928A (en) * | 1978-03-17 | 1979-09-22 | Hitachi Ltd | Keyboard control circuit |
-
1981
- 1981-12-28 JP JP19304281U patent/JPS58101235U/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54122928A (en) * | 1978-03-17 | 1979-09-22 | Hitachi Ltd | Keyboard control circuit |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61143829A (en) * | 1984-12-14 | 1986-07-01 | Canon Inc | Keyboard device |
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