JPH0420130U - - Google Patents
Info
- Publication number
- JPH0420130U JPH0420130U JP6206190U JP6206190U JPH0420130U JP H0420130 U JPH0420130 U JP H0420130U JP 6206190 U JP6206190 U JP 6206190U JP 6206190 U JP6206190 U JP 6206190U JP H0420130 U JPH0420130 U JP H0420130U
- Authority
- JP
- Japan
- Prior art keywords
- digital
- circuit
- timing
- switch
- digital output
- 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
- 125000004122 cyclic group Chemical group 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Electronic Switches (AREA)
- Logic Circuits (AREA)
Description
第１図は本考案に係るデジタルステータス入力
回路の一実施例を示す回路構成図、第２図は第１
図の回路の動作を示すタイムチヤート、第３図は
従来のデジタル入力回路の一例を示す回路構成図
である。
１……サイクリツクレジスタ、２１〜２４……
ＡＮＤゲート、３１〜３４……ラツチ、Ｔｒ１〜
Ｔｒ４……トランジスタ、ＳＷ１〜ＳＷ４……ス
イツチ、Ｒ１〜Ｒ３……抵抗、Ｐｈ１……フオト
カプラ、Ｐｄ……フオトダイオード、ＰＴｒ……
フオトトランジスタ。
FIG. 1 is a circuit configuration diagram showing an embodiment of the digital status input circuit according to the present invention, and FIG.
FIG. 3 is a time chart showing the operation of the circuit shown in the figure, and FIG. 3 is a circuit configuration diagram showing an example of a conventional digital input circuit. 1...Cyclic register, 21-24...
AND gate, 31 to 34...Latch, Tr 1 to
Tr4 ...Transistor, SW1 - SW4 ...Switch, R1 - R3 ...Resistor, Ph1 ...Photocoupler, Pd ...Photodiode, PTr ...
Phototransistor.
Claims (1)
路を接続し、前記デジタル出力回路の状態に応じ
てデジタル入力を行うデジタルステータス入力回
路において、 前記デジタル出力回路は複数個設けられていて
、 各デジタル出力回路の出力端にそれぞれ接続さ
れたスイツチと、 各スイツチをクロツクのタイミングで周期的に
時分割でオン／オフさせる指令を出すサイクリツ
クレジスタと、 オンになつている前記スイツチの出力をそのタ
イミングでラツチするラツチ機構とを具備し、 クロツクのタイミングで前記サイクリツクレジ
スタに接続された前記スイツチを周期的にオン／
オフして切換え、複数のデジタル出力回路の状態
で複数ビツトのデジタル入力を行うことを特徴と
するデジタルステータス入力回路。[Claims for Utility Model Registration] A digital status input circuit that connects a digital input circuit to an external digital output circuit and performs digital input according to the state of the digital output circuit, wherein a plurality of the digital output circuits are provided. a switch connected to the output terminal of each digital output circuit, a cyclic register that issues a command to turn each switch on and off periodically and in a time-division manner at clock timing, and the switch that is turned on. and a latch mechanism that latches the output of the cyclic register at that timing, and periodically turns on/off the switch connected to the cyclic register at the timing of the clock.
A digital status input circuit characterized in that it is switched off and switched to perform a multi-bit digital input in the state of a plurality of digital output circuits.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6206190U JPH0420130U (en) | 1990-06-12 | 1990-06-12 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6206190U JPH0420130U (en) | 1990-06-12 | 1990-06-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0420130U true JPH0420130U (en) | 1992-02-20 |
Family
ID=31590870
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6206190U Pending JPH0420130U (en) | 1990-06-12 | 1990-06-12 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0420130U (en) |
-
1990
- 1990-06-12 JP JP6206190U patent/JPH0420130U/ja active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS61128832U (en) | ||
| JPH0420130U (en) | ||
| JPH0170417U (en) | ||
| JPH03110531U (en) | ||
| JPS5877930U (en) | analog switch | |
| JPH0415315U (en) | ||
| JPS59122629U (en) | Digital circuit push button input device | |
| JPH0469821U (en) | ||
| JPH01138103U (en) | ||
| JPS63173979U (en) | ||
| JPH0476736U (en) | ||
| JPH0216622U (en) | ||
| JPH02143843U (en) | ||
| JPH0264235U (en) | ||
| JPS62164439U (en) | ||
| JPH0466818U (en) | ||
| JPH04223020A (en) | Dip switch | |
| JPH03109432U (en) | ||
| JPS62159005U (en) | ||
| JPH02133026U (en) | ||
| JPH03113533U (en) | ||
| JPS6399277U (en) | ||
| JPH0228135U (en) | ||
| JPH0255741U (en) | ||
| JPS6125628U (en) | Digital signal input circuit |