JPH05224792A - Terminating system for scsi bus - Google Patents

Terminating system for scsi bus

Info

Publication number
JPH05224792A
JPH05224792A JP4058996A JP5899692A JPH05224792A JP H05224792 A JPH05224792 A JP H05224792A JP 4058996 A JP4058996 A JP 4058996A JP 5899692 A JP5899692 A JP 5899692A JP H05224792 A JPH05224792 A JP H05224792A
Authority
JP
Japan
Prior art keywords
bus
termination
connection
systems
terminating
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
Application number
JP4058996A
Other languages
Japanese (ja)
Inventor
Keiichi Yokota
圭一 横田
Yutaka Takekoshi
豊 竹腰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
NEC Engineering Ltd
Original Assignee
NEC Corp
NEC Engineering Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NEC Corp, NEC Engineering Ltd filed Critical NEC Corp
Priority to JP4058996A priority Critical patent/JPH05224792A/en
Publication of JPH05224792A publication Critical patent/JPH05224792A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To provide the terminating system for an SCSI bus so as to terminate the bus without using any terminating connector. CONSTITUTION:Respective systems 1-3 are provided with two-joint parts (10, 11), (12, 13) and (11, 14) for bus connection used for connecting the systems being connected with cables for bus connection with bus, and single-joint parts 16-18 for bus termination connected to terminating circuits 7-9 provided in the systems. the buses of the systems 1 and 3 positioned at terminals can be terminated by respectively connecting the joint parts 10 and 15 for bus connection and the joint parts 16 and 18 for bus termination while using cables 19 and 23.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、SCSIバスのインタ
フェースを持つシステムで、バスの終端を行なうのに用
いられるSCSIバスの終端方式に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a SCSI bus termination system used to terminate a bus in a system having a SCSI bus interface.

【0002】[0002]

【従来の技術】ANSI(American National Standard
s Institute)で規格化されているSCSI(small com
puter system interface)バスのインタフェースを持つ
システムでは、一般にバス接続用の接合部を2つ持って
おり、システム間の接続はバス接続用ケーブルをこれら
バス接続用の接合部に順次接続していくことで行なわれ
る。また端末に位置するシステムでは、終端回路を内蔵
したコネクタをバス接続用の接合部の他方に嵌合するこ
とでバスの終端を行なっていた。
2. Description of the Related Art ANSI (American National Standard)
s Institute) standardized SCSI (small com
puter system interface) Generally, a system with a bus interface has two joints for bus connection, and the connection between systems is to connect a cable for bus connection to these joints for bus connection one after another. Done in. Also, in the system located at the terminal, the bus is terminated by fitting a connector having a built-in terminating circuit to the other of the joints for connecting the bus.

【0003】[0003]

【発明が解決しようとする課題】ところでこのような従
来の終端方式では、SCSIバスの特殊な形状の接合部
に合わせた終端コネクタを別に用意する必要があり、そ
の形状によっては終端コネクタ自体の作製が困難な場合
がある。またシステムの運用上、端末のシステムではな
い場合には、終端コネクタが必要ないので、終端コネク
タの保管上の問題も発生する。
By the way, in such a conventional termination method, it is necessary to separately prepare a termination connector adapted to a joint portion of the SCSI bus having a special shape. Depending on the shape, the termination connector itself may be manufactured. Can be difficult. Further, in terms of system operation, if the terminal system is not a terminal system, a termination connector is not required, and a problem occurs in storing the termination connector.

【0004】本発明は、このような従来の技術が有する
課題を解決するために提案されたものであり、終端コネ
クタを用いることなくバスの終端を行なえるSCSIバ
スの終端方式を提供することを目的とする。
The present invention has been proposed in order to solve the problems of the prior art, and it is an object of the present invention to provide a SCSI bus termination method capable of terminating a bus without using a termination connector. To aim.

【0005】[0005]

【課題を解決するための手段】この目的を達成するため
に本発明は、ANSI X3.131−1986で規格
化されているSCSIバスのインタフェースを持つシス
テムにおいて、バス接続用ケーブルが接続されシステム
間をバス接続するのに用いられるバス接続用の2つの接
合部と、システム内に設けた終端回路に接続されるバス
終端用の1つの接合部とを各システムが備え、端末に位
置するシステムのバスの終端は、バス接続用の2つの接
合部の一方と上記バス終端用の接合部とをケーブルで接
続することで行なえる構成としてある。
In order to achieve this object, the present invention provides a system having a SCSI bus interface standardized by ANSI X3.131-1986, in which a bus connecting cable is connected between systems. Each system is provided with two joints for bus connection used for connecting the bus and one joint for bus terminating connected to a terminating circuit provided in the system. The bus can be terminated by connecting one of the two joining portions for connecting the bus and the joining portion for ending the bus with a cable.

【0006】[0006]

【作用】上述した構成によれば、システム内に終端回路
を設けるとともに、この終端回路に接続されるバス終端
用の接合部を各システムに設けたので、端末に位置する
システムの終端は、バス接続用の一方の接合部をバス終
端用の接合部にケーブルにより接続することで行なえ
る。
According to the above-described structure, since the termination circuit is provided in the system and the junction for bus termination connected to the termination circuit is provided in each system, the termination of the system located at the terminal is the bus. This can be done by connecting one joint for connection to the joint for terminating the bus with a cable.

【0007】[0007]

【実施例】以下、本発明によるSCSIバスの終端方式
の具体的な実施例を図面に基づき詳細に説明する。図1
に、このSCSIバスの終端方式の一実施例を示す。こ
の図で、システム1,2,3は、SCSIバスのインタ
フェースを持つシステムであり、システム1,3はバス
の端末に位置し、システム2はバスの中間に位置してい
る。各システム1,2,3は、SCSIバスコントロー
ラ4,5,6をそれぞれ持ち、これらバスコントローラ
4,5,6に接続される2つのバス接続用の接合部(1
0,11),(12,13),(14,15)をそれぞ
れ備えている。また各システム1,2,3内には、SC
SIバス終端回路7,8,9がそれぞれ設けられ、この
終端回路7,8,9に接続される1つのバス終端用の接
合部16,17,18をそれぞれ備えている。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments of the SCSI bus termination method according to the present invention will be described in detail below with reference to the drawings. Figure 1
An example of this SCSI bus termination method is shown in FIG. In this figure, systems 1, 2 and 3 are systems having a SCSI bus interface, systems 1 and 3 are located at the terminals of the bus, and system 2 is located in the middle of the bus. Each system 1, 2, 3 has a SCSI bus controller 4, 5, 6, respectively, and two bus connection joints (1) connected to these bus controllers 4, 5, 6 respectively.
0, 11), (12, 13), (14, 15), respectively. In addition, in each system 1, 2, 3
SI bus terminating circuits 7, 8 and 9 are provided, respectively, and one bus terminating joint portion 16, 17 and 18 connected to the terminating circuits 7, 8 and 9 is provided, respectively.

【0008】システム間の接続は、端末のシステム1と
中間のシステム2ではバス接続用の一方の接合部11と
バス接続用の一方の接合部12の間を接続ケーブル20
により接続することで行ない、中間のシステム2を図示
しない別の中間のシステムに接続するには、バス接続用
の他方の接合部13に接続したケーブル21を用いて行
なう。また端末のシステム3を図示しない別の中間シス
テムに接続するには、バス接続用の一方の接合部14に
接続したケーブル22によって行なう。このようにバス
の接続においては、端末のシステム1,3ではバス接続
用の1つの接合部11,14が用いられ、中間のシステ
ム2では2つのバス接続用の接合部12,13が用いら
れる。
The connection between the systems is such that, in the system 1 of the terminal and the intermediate system 2, the connection cable 20 is provided between the one joint 11 for bus connection and the one joint 12 for bus connection.
In order to connect the intermediate system 2 to another intermediate system (not shown), the cable 21 connected to the other joint 13 for bus connection is used. Further, the terminal system 3 is connected to another intermediate system (not shown) by the cable 22 connected to one joint 14 for connecting the bus. As described above, in the bus connection, the terminal systems 1 and 3 use one joint 11 and 14 for bus connection, and the intermediate system 2 uses two joints 12 and 13 for bus connection. ..

【0009】端末に位置するシステム1,3でバスの終
端を行なうには、システム1側ではバス接続用の他方の
接合部10をバス終端用の接合部16にケーブル19に
よって接続することで行ない、システム3側ではバス接
続用の他方の接合部15をバス終端用の接合部18にケ
ーブル23によって接続することで行なう。
In order to terminate the bus in the systems 1 and 3 located at the terminals, the system 1 side connects the other junction 10 for bus connection to the junction 16 for bus termination by a cable 19. On the system 3 side, the other connecting portion 15 for bus connection is connected to the connecting portion 18 for bus termination by a cable 23.

【0010】なお、本発明は上述した実施例に限定され
ず、要旨の範囲内で種々の変更実施が可能である。
It should be noted that the present invention is not limited to the above-mentioned embodiments, and various modifications can be made within the scope of the invention.

【0011】[0011]

【発明の効果】以上説明したように本発明によれば、終
端コネクタを用いることなく端末のシステムでバスの終
端を行なえるので、接合部の形状に合わせた特別の終端
コネクタを製作する必要がない。これにより、システム
間の接続が従来に比べて格段に容易になるとともに、終
端コネクタの管理が不要であるから運用管理面でも優れ
ている。
As described above, according to the present invention, the terminal system can terminate the bus without using a terminating connector, so that it is necessary to manufacture a special terminating connector matching the shape of the joint. Absent. As a result, the connection between the systems is much easier than in the past, and the management of the terminal connector is not required, which is excellent in operation management.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明によるSCSIバスの終端方式の一実施
例を示す構成図である。
FIG. 1 is a configuration diagram showing an embodiment of a termination method of a SCSI bus according to the present invention.

【符号の説明】[Explanation of symbols]

1,2,3 SCSIバスのインターフェースを持つシ
ステム 4,5,6 SCSIバスコントローラ 7,8,9 SCSIバス終端回路 10,11,12,13,14,15 バス接続用の接
合部 16,17,18 バス終端用の接合部 19,20,21,22,23 接続ケーブル
1,2,3 SCSI bus interface system 4,5,6 SCSI bus controller 7,8,9 SCSI bus terminating circuit 10,11,12,13,14,15 Bus connection joint 16,17, 18 Junction for bus termination 19, 20, 21, 22, 23 Connection cable

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 SCSIバスのインタフェースを持つシ
ステムにおいて、 バス接続用ケーブルが接続されシステム間をバス接続す
るのに用いられるバス接続用の2つの接合部と、システ
ム内に設けた終端回路に接続されるバス終端用の1つの
接合部とを各システムが備え、 端末に位置するシステムのバスの終端は、バス接続用の
2つの接合部の一方と上記バス終端用の接合部とをケー
ブルで接続することで行なうことを特徴とするSCSI
バスの終端方式。
1. In a system having a SCSI bus interface, a bus connection cable is connected and two joints for bus connection used for bus connection between systems and a termination circuit provided in the system are connected. Each system is equipped with one junction for bus termination, and the bus termination of the system located at the terminal is one of the two junctions for bus connection and the above-mentioned junction for bus termination with a cable. SCSI characterized by being connected
Bus termination method.
JP4058996A 1992-02-12 1992-02-12 Terminating system for scsi bus Pending JPH05224792A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4058996A JPH05224792A (en) 1992-02-12 1992-02-12 Terminating system for scsi bus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4058996A JPH05224792A (en) 1992-02-12 1992-02-12 Terminating system for scsi bus

Publications (1)

Publication Number Publication Date
JPH05224792A true JPH05224792A (en) 1993-09-03

Family

ID=13100469

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4058996A Pending JPH05224792A (en) 1992-02-12 1992-02-12 Terminating system for scsi bus

Country Status (1)

Country Link
JP (1) JPH05224792A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5983296A (en) * 1995-05-02 1999-11-09 Lsi Logic Corporation Method and apparatus for terminating busses having different widths
US6029216A (en) * 1997-06-27 2000-02-22 Lsi Logic Corporation Auto-termination method and apparatus for use with either active high or active low terminators
US6070206A (en) * 1997-03-31 2000-05-30 Lsi Logic Corporation Method and apparatus for terminating a bus
JP2012074761A (en) * 2010-09-27 2012-04-12 Denso Corp Communication device and communication unit

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5983296A (en) * 1995-05-02 1999-11-09 Lsi Logic Corporation Method and apparatus for terminating busses having different widths
US6070206A (en) * 1997-03-31 2000-05-30 Lsi Logic Corporation Method and apparatus for terminating a bus
US6029216A (en) * 1997-06-27 2000-02-22 Lsi Logic Corporation Auto-termination method and apparatus for use with either active high or active low terminators
JP2012074761A (en) * 2010-09-27 2012-04-12 Denso Corp Communication device and communication unit

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