JPS63162421U - - Google Patents
Info
- Publication number
- JPS63162421U JPS63162421U JP5462287U JP5462287U JPS63162421U JP S63162421 U JPS63162421 U JP S63162421U JP 5462287 U JP5462287 U JP 5462287U JP 5462287 U JP5462287 U JP 5462287U JP S63162421 U JPS63162421 U JP S63162421U
- Authority
- JP
- Japan
- Prior art keywords
- keyboard
- switch
- signal
- key input
- switching 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
- 238000013479 data entry Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Input From Keyboards Or The Like (AREA)
- Keying Circuit Devices (AREA)
- Logic Circuits (AREA)
Description
第１図は本考案実施例キーボード切換え回路の
構成を示すブロツク図。第２図は本考案実施例キ
ーボード切換え回路のキーボードインタフエース
の各信号を示す図。第３図は本考案実施例キーボ
ード切換え回路の各信号のタイミングチヤート。
第４図は従来例キーボード切換え回路の構成を示
すブロツク図。
１…本体装置、２…キーボード(A)、３…キー
ボード(B)、４…切換えスイツチ、５…論理回路
、１１…リセツト信号、１２…レデイ信号、１３
…キーデータ、１４…キー入力信号、１５…セレ
クト信号。
FIG. 1 is a block diagram showing the configuration of a keyboard switching circuit according to an embodiment of the present invention. FIG. 2 is a diagram showing each signal of the keyboard interface of the keyboard switching circuit according to the embodiment of the present invention. FIG. 3 is a timing chart of each signal of the keyboard switching circuit according to the embodiment of the present invention.
FIG. 4 is a block diagram showing the configuration of a conventional keyboard switching circuit. DESCRIPTION OF SYMBOLS 1... Main unit, 2... Keyboard (A), 3... Keyboard (B), 4... Changeover switch, 5... Logic circuit, 11... Reset signal, 12... Ready signal, 13
...Key data, 14...Key input signal, 15...Select signal.
Claims (1)
イツチで切換え接続するデータエントリ装置のキ
ーボード切換え回路において、 上記本体装置から上記キーボードに伝送される
リセツト信号およびレデイ信号は固定的に分配接
続され、 上記切換えスイツチは各キーボードのキーデー
タを切換え接続する構成であり、 この切換えスイツチを制御する論理回路を備え
、 この論理回路は、各キー入力信号を受信し、こ
のキー入力信号を送出しているものに上記切換え
スイツチを接続するとともに、二以上のキーボー
ドから共にキー入力信号が入力しているときには
最先にキー入力信号を送出したキーボードへの接
続を継続する論理手段を含む ことを特徴とするキーボード切換え回路。[Claim for Utility Model Registration] In a keyboard switching circuit of a data entry device in which a main unit and a plurality of keyboards are selectively connected by a switch, the reset signal and ready signal transmitted from the main unit to the keyboard are fixed. The switch is configured to switch and connect the key data of each keyboard, and is equipped with a logic circuit that controls this switch. This logic circuit receives each key input signal, and In addition to connecting the above-mentioned changeover switch to the one that is sending out the signal, logical means is provided to continue the connection to the keyboard that sent the key input signal first when key input signals are being input from two or more keyboards. A keyboard switching circuit comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5462287U JPS63162421U (en) | 1987-04-10 | 1987-04-10 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5462287U JPS63162421U (en) | 1987-04-10 | 1987-04-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63162421U true JPS63162421U (en) | 1988-10-24 |
Family
ID=30881784
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5462287U Pending JPS63162421U (en) | 1987-04-10 | 1987-04-10 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63162421U (en) |
-
1987
- 1987-04-10 JP JP5462287U patent/JPS63162421U/ja active Pending
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