JPH058751U - Hard disk device with automatic termination resistor connection control circuit - Google Patents
Hard disk device with automatic termination resistor connection control circuitInfo
- Publication number
- JPH058751U JPH058751U JP5499591U JP5499591U JPH058751U JP H058751 U JPH058751 U JP H058751U JP 5499591 U JP5499591 U JP 5499591U JP 5499591 U JP5499591 U JP 5499591U JP H058751 U JPH058751 U JP H058751U
- Authority
- JP
- Japan
- Prior art keywords
- hard disk
- disk device
- connector
- terminating
- control 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
Landscapes
- Details Of Connecting Devices For Male And Female Coupling (AREA)
Abstract
(57)【要約】
【目的】 ディジーチェーン方式により複数台接続され
るハードディスク装置が、終端抵抗を自動的に設定す
る。
【構成】 終端側装置のコネクタ１から出力される接続
通知信号５に低レベル信号“Ｌ”を出力し、上位側装置
のコネクタ２に入力される接続通知信号６に低レベルを
伝搬する。低レベルが入力された上位側装置は、リレー
素子のスイッチを開放し、終端抵抗を開放状態にする。
終端装置は、コネクタ２が未接続となる為にリレー素子
のスイッチが短絡し、終端抵抗を接続する。
(57) [Summary] [Purpose] A hard disk drive connected by a daisy chain method automatically sets the terminating resistance. A low level signal "L" is output to a connection notification signal 5 output from a connector 1 of a terminal device, and a low level is propagated to a connection notification signal 6 input to a connector 2 of a host device. The upper device to which the low level is input opens the switch of the relay element and opens the terminating resistor.
In the terminating device, since the connector 2 is not connected, the switch of the relay element is short-circuited and the terminating resistor is connected.
Description
【０００１】[0001]
本考案は終端抵抗自動接続制御回路を有するハードディスク装置に関する。 The present invention relates to a hard disk device having a termination resistance automatic connection control circuit.
【０００２】[0002]
従来の技術は、ディジーチェーン方式により複数台接続するハードディスク装 置の終端抵抗の設定は、ＤｉｐスイッチのＯＮ／ＯＦＦによって行われている。 In the conventional technology, the setting of the terminating resistance of the hard disk device connected by the daisy chain method is performed by turning on / off the Dip switch.
【０００３】[0003]
従来の技術は、Ｄｉｐスイッチが正しく設定されていない場合には、動作が保 証されないという欠点がある。また、ＤｉｐスイッチのＯＮ／ＯＦＦ等の人為的 操作が発生する。 The conventional technique has a drawback in that the operation is not guaranteed if the Dip switch is not set correctly. Also, an artificial operation such as turning on / off the Dip switch occurs.
【０００４】[0004]
本考案の終端抵抗自動接続制御回路を有するハードディスク装置は、ディジー チェーン方式により複数台を同一インターフェース・ケーブルで接続した場合、 終端側装置からの接続通知信号の有無により、終端装置であるか否かが認識し、 終端抵抗の自動設定を行なう。 The hard disk drive having the terminating resistor automatic connection control circuit of the present invention is a terminating device depending on the presence or absence of a connection notification signal from the terminating device when multiple units are connected by the daisy chain method with the same interface cable. Recognizes and automatically sets the terminating resistance.
【０００５】[0005]
次に本考案について図面を参照して説明する。 Next, the present invention will be described with reference to the drawings.
【０００６】 図１は本考案の一実施例を示す回路図である。１はインターフェースの上位側 コネクタ部、２はインターフェースの下位側接続コネクタ部、３はハードディス ク装置の動作を制御する入出力制御信号、４は入力制御信号であり終端抵抗の接 続の有無を必要とする信号、５は上位側ハードディスク装置に対し終端側ハード ディスク装置が接続されていることを通知するための接続通知信号、６は終端側 ハードディスク装置が存在する時、その存在を認識するための接続通知信号、７ は終端抵抗、８は終端認識制御および終端抵抗接続制御を司るリレー、コイルに 電流が流れるとスイッチをＯＦＦとする。（以下リレー素子と称す）９はハード ディスク装置の動作制御部である。FIG. 1 is a circuit diagram showing an embodiment of the present invention. 1 is an upper connector part of the interface, 2 is a lower connector part of the interface, 3 is an input / output control signal for controlling the operation of the hard disk device, and 4 is an input control signal, which indicates whether the terminating resistor is connected or not. Required signal, 5 is a connection notification signal for notifying the upper hard disk device that the terminal hard disk device is connected, and 6 is for recognizing the existence of the terminal hard disk device when it exists. Connection notification signal, 7 is a termination resistor, 8 is a relay that controls termination recognition control and termination resistance connection control, and turns off the switch when current flows through the coil. Reference numeral 9 (hereinafter referred to as a relay element) is an operation control unit of the hard disk device.
【０００７】 図２は本考案のハードディスク装置をディジーチェーン方式で接続した場合を 示すブロック図である。１０は情報処理装置の制御部、１１，１２はハードディ スク装置。（以下装置Ａ，Ｂと称す）１３，１４はハードディスク装置の動作制 御部、１５，１６は終端認識回路および自動終端抵抗回路および自動終端抵抗接 続回路１００、１７〜２０はコネクタ、２１はハードディスク装置間を接続する 連結用制御信号接続ケーブル（以下連結ケーブルと称す）である。FIG. 2 is a block diagram showing a case where the hard disk devices of the present invention are connected by a daisy chain method. Reference numeral 10 is a control unit of the information processing device, and 11 and 12 are hard disk devices. (Hereinafter referred to as devices A and B) 13 and 14 are operation control units of the hard disk device, 15 and 16 are termination recognition circuits and automatic termination resistance circuits and automatic termination resistance connection circuits 100, 17 to 20 are connectors, and 21 is A control signal connection cable for connection (hereinafter referred to as a connection cable) that connects between hard disk devices.
【０００８】 次に動作を説明する。装置Ｂ１２のコネクタ１から出力される接続通知信号５ に、図１に示すように低レベル信号“Ｌ”を出力し、装置Ａ１１のコネクタ２に 入力される接続通知信号６に低レベルを伝搬する。接続通知信号６に低レベルが 入力された装置Ａ１１は、リレー素子のスイッチを開放し、信号線４の終端抵抗 を開放状態と同等にする。逆に終端装置Ｂ１２はコネクタ２が未接続となるため リレー素子のスイッチを短絡し信号線４の終端抵抗を接続する。Next, the operation will be described. As shown in FIG. 1, a low level signal "L" is output to the connection notification signal 5 output from the connector 1 of the device B12, and the low level is propagated to the connection notification signal 6 input to the connector 2 of the device A11. .. The device A11 in which the connection notification signal 6 is input at a low level opens the switch of the relay element to make the terminating resistance of the signal line 4 equivalent to the open state. On the contrary, in the terminating device B12, since the connector 2 is not connected, the switch of the relay element is short-circuited and the terminating resistor of the signal line 4 is connected.
【０００９】[0009]
以上説明したように本考案は、ハードディスク装置のコネクタ２に接続される 終端側装置からの接続信号の有無で、終端装置であるか否かの認識が可能であり 、また、終端抵抗を自動的に設定できるため終端抵抗の設定ミスにより動作不可 や人為的操作を省くことができる効果がある。 As described above, according to the present invention, it is possible to recognize whether the terminal device is the terminal device or not by the presence or absence of the connection signal from the terminal device connected to the connector 2 of the hard disk device. Since it can be set to, there is an effect that operation failure and human operation can be omitted due to the setting error of the terminating resistor.
【図１】本考案の一実施例を示す回路図である。FIG. 1 is a circuit diagram showing an embodiment of the present invention.
【図２】本考案の一使用例を示すブロック図である。FIG. 2 is a block diagram showing an example of use of the present invention.
１ 上位側制御信号接続コネクタ ２ 下位側制御信号接続コネクタ ３ 入力および出力制御信号 ４ 入力制御信号 ５ 上位側装置に対する接続通知信号 ６ 終端側装置からの接続通知信号 ７ 終端抵抗 ８ リレー素子 ９ ハードディスク装置の動作制御部 １０ 情報処理装置の制御部 １１，１２ ハードディスク装置 １３，１４ ハードディスク装置の動作制御部 １５，１６ 終端認識回路および自動終端抵抗接続回
路 １７〜２０ コネクタ ２１ 連結用制御信号接続ケーブル1 Upper side control signal connection connector 2 Lower side control signal connection connector 3 Input and output control signal 4 Input control signal 5 Connection notification signal to upper side device 6 Connection notification signal from terminal side device 7 Termination resistor 8 Relay element 9 Hard disk device Operation control unit 10 Control unit of information processing device 11,12 Hard disk device 13,14 Operation control unit of hard disk device 15,16 Termination recognition circuit and automatic termination resistance connection circuit 17 to 20 Connector 21 Control signal connection cable for connection
Claims (1)
チェーン方式を使用し同一のインターフェース・ケーブ
ルで接続する時、終端側装置からの接続通知信号の有無
により終端装置であるか否かを認識し、終端抵抗を自動
的に設定する終端抵抗自動接続制御回路部を有すること
を特徴とするハードディスク装置。[Claims for utility model registration] [Claim 1] When a plurality of hard disk devices are connected using the same interface cable using the daisy chain method, the device is a termination device depending on the presence or absence of a connection notification signal from the termination side device. A hard disk device having a terminating resistor automatic connection control circuit section for recognizing whether or not the terminating resistor is automatically set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5499591U JPH058751U (en) | 1991-07-16 | 1991-07-16 | Hard disk device with automatic termination resistor connection control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5499591U JPH058751U (en) | 1991-07-16 | 1991-07-16 | Hard disk device with automatic termination resistor connection control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH058751U true JPH058751U (en) | 1993-02-05 |
Family
ID=12986240
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5499591U Pending JPH058751U (en) | 1991-07-16 | 1991-07-16 | Hard disk device with automatic termination resistor connection control circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH058751U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018155696A1 (en) | 2017-02-27 | 2018-08-30 | 川崎重工業株式会社 | Communication system |
-
1991
- 1991-07-16 JP JP5499591U patent/JPH058751U/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018155696A1 (en) | 2017-02-27 | 2018-08-30 | 川崎重工業株式会社 | Communication system |
| US10831695B2 (en) | 2017-02-27 | 2020-11-10 | Kawasaki Jukogyo Kabushiki Kaisha | Communication system |
| EP4235445A2 (en) | 2017-02-27 | 2023-08-30 | Kawasaki Jukogyo Kabushiki Kaisha | Communication system |
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