JPH02113446U - - Google Patents
Info
- Publication number
- JPH02113446U JPH02113446U JP2263289U JP2263289U JPH02113446U JP H02113446 U JPH02113446 U JP H02113446U JP 2263289 U JP2263289 U JP 2263289U JP 2263289 U JP2263289 U JP 2263289U JP H02113446 U JPH02113446 U JP H02113446U
- Authority
- JP
- Japan
- Prior art keywords
- common line
- key
- voltage signal
- input terminal
- microcomputer
- 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
- 238000006243 chemical reaction Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 1
Landscapes
- Input From Keyboards Or The Like (AREA)
Description
第１図は本考案の実施例を示す回路図、第２図
及び第３図は従来例を示す回路図である。
２１……マイクロコンビユータ、２２……電圧
信号発生回路、２８……共通ライン、２９〜３２
……キースイツチ。
FIG. 1 is a circuit diagram showing an embodiment of the present invention, and FIGS. 2 and 3 are circuit diagrams showing a conventional example. 21...Microcomputer, 22...Voltage signal generation circuit, 28...Common line, 29-32
...Key switch.
Claims (1)
ツチと、この各キースイツチの他端がそれぞれ接
続され、前記各キースイツチの選択オン操作によ
つて前記共通ラインに電圧値の異なる電圧信号を
出力する電圧信号発生回路と、Ａ／Ｄ変換機能付
き入力端子を設け、前記共通ラインをその入力端
子に接続してなるマイクロコンピータからなるこ
とを特徴とするマイクロコンピユータのキー入力
装置。 A plurality of key switches each have one end connected to a common line, and the other end of each key switch is connected to each other, and a voltage signal is generated that outputs a voltage signal having a different voltage value to the common line when each of the key switches is selectively turned on. 1. A key input device for a microcomputer, comprising a circuit, and a microcomputer provided with an input terminal with an A/D conversion function, and connected to the input terminal to the common line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2263289U JPH02113446U (en) | 1989-02-28 | 1989-02-28 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2263289U JPH02113446U (en) | 1989-02-28 | 1989-02-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02113446U true JPH02113446U (en) | 1990-09-11 |
Family
ID=31240917
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2263289U Pending JPH02113446U (en) | 1989-02-28 | 1989-02-28 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02113446U (en) |
-
1989
- 1989-02-28 JP JP2263289U patent/JPH02113446U/ja active Pending
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