JPS58200322A - Interface circuit of peripheral device - Google Patents

Interface circuit of peripheral device

Info

Publication number
JPS58200322A
JPS58200322A JP57083492A JP8349282A JPS58200322A JP S58200322 A JPS58200322 A JP S58200322A JP 57083492 A JP57083492 A JP 57083492A JP 8349282 A JP8349282 A JP 8349282A JP S58200322 A JPS58200322 A JP S58200322A
Authority
JP
Japan
Prior art keywords
circuit
signal
interface
control
voltage
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
JP57083492A
Other languages
Japanese (ja)
Inventor
Yoshitsugu Kitamura
北村 義次
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
Original Assignee
NEC Corp
Nippon Electric Co 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, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP57083492A priority Critical patent/JPS58200322A/en
Publication of JPS58200322A publication Critical patent/JPS58200322A/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00Error detection; Error correction; Monitoring
    • G06F11/07Responding to the occurrence of a fault, e.g. fault tolerance
    • G06F11/0703Error or fault processing not based on redundancy, i.e. by taking additional measures to deal with the error or fault not making use of redundancy in operation, in hardware, or in data representation
    • G06F11/0751Error or fault detection not based on redundancy
    • G06F11/0754Error or fault detection not based on redundancy by exceeding limits

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Debugging And Monitoring (AREA)

Abstract

PURPOSE:To discriminate the deterministic state of an interface signal from an opposite-side device and to secure logical gate control on other similar signals by inputting the control power supply voltage of the opposite-side device from an interface line and comparing the voltage. CONSTITUTION:The output voltage level of the power supply circuit 201 of a controller 2 is sent onto a control voltage monitoring line 5 after the waveform shaping and short-circuit protection of a filter circuit 202. At the side of a peripheral device 1, a filter circuit 102 processes a ripple of the voltage level (s) on the monitoring line 5 and a voltage comparing circuit 103 makes the comparison with a reference voltage (a). When the controller 2 is powered on and the output voltage level (r) rises, it is detected as the comparison level signal (b) of the peripheral device 1 and when it exceeds the reference level (a), a discrimination signal (c) is driven to set a latch circuit 107. The logical control circuit 203 and signal transmitting circuit 204 of the controller 2 are determined and once an interface-enable-instruction signal is supplied to a decoder circuit 105, a set command signal (e) is supplied to a logical gate circuit 106 to set the latch circuit 107.

Description

【発明の詳細な説明】 本発明は周辺装置とその.制御装置間における・fンタ
フェース信号回路に関し、特に両装置間における電源制
御シーケンスが存在しない場合の制御装置側電源投入・
切□断時の周辺装置への不確かなインタフェース信号送
出に対する周辺装置側保護回路に関する。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a peripheral device and its peripheral device. Regarding the interface signal circuit between the control devices, especially when there is no power control sequence between the two devices,
This invention relates to a peripheral device side protection circuit against sending an uncertain interface signal to a peripheral device during disconnection.

従来この種の制御装置と、周辺装置間のインタフェース
にお゛いては,特に□周辺装置がディスク装置などの外
部記憶装置である場合に制御装置の電源の投入・切鹸に
伴うインタフェース上への不確定制御情報の送出に伴な
う、周辺装置側の誤った誉込魯その他の障害゛廃生を防
ぐために、両装置の電源制御゛に対して二足のシーケン
スを与え、またはインタフェース信号線内にインタフェ
ースの開閉゛を意味する制御信号全付加するなどの方法
がと1111、11 られていた。   ゛ 複数装置間に渡る電源シーケンスは突発的停電などの定
常昇動iに対して不十分であり、ま逅インタフェース上
への□制御信号送出はいずれにせよ当該装置の電源切断
に伴ない電圧が垂下すると゛回路動作として確定できず
、特に゛各信号回路が2線差動型信号送受信回路を用い
ている場合、電源電圧の低下に伴ない動作不確定となる
欠点があり、これt** X′うとするとJ特殊で複雑
な回路−成′を両装置内において必要とし、しかも不十
分さが残っていた。
Conventionally, in the interface between this type of control device and a peripheral device, especially when the peripheral device is an external storage device such as a disk device, there are In order to prevent erroneous input and other failures on the peripheral device side due to the sending of uncertain control information, two sequences are given to the power supply control of both devices, or the interface signal line is Methods such as adding all control signals meaning opening/closing of the interface within the interface have been proposed1111,11.゛The power supply sequence that spans multiple devices is insufficient for steady rises such as sudden power outages, and the sending of control signals to the matching interface will cause the voltage to drop as the power to the device is turned off. If the voltage drops, the operation of the circuit cannot be determined.Especially when each signal circuit uses a two-wire differential signal transmitting/receiving circuit, there is a drawback that the operation becomes uncertain as the power supply voltage decreases. If this were to be done, special and complicated circuitry would be required in both devices, and there remained inadequacies.

本発明は相互にインタフェース信号線を有する装置間に
おいて送信信号と共に当該装置の制御電圧レベル信号(
線)を相手装置に通知することにより、受信イ、ンタフ
ーース信竺の正常性確認を必要許るi置側が5各↑相手
側装置より送られて来 −た制御電圧レペ々を基準電圧
と比較し一定値以下であれば相手側装置の制御回路機能
が不確定であると判断し、送られてくるインタフェース
信号内容を無視することにより上記欠点を解決し、簡単
で確実なインタフェース制御操作を可能とした周辺装置
用インタフェース回路を提供するものである。
The present invention provides transmission signals between devices having mutual interface signal lines as well as control voltage level signals (
By notifying the receiving device (wire) to the other device, the receiving side can check the normality of the interface communication. If the comparison is less than a certain value, it is determined that the control circuit function of the other device is uncertain, and the content of the sent interface signal is ignored. This solves the above drawback and allows easy and reliable interface control operation. The present invention provides an interface circuit for peripheral devices that makes it possible.

本発明によればインタフェース信号線によシ接続された
二つ以上の装置間において互いに必要とする装置側へ自
己装置内制御用電源の制御電圧モニタ線を設け、必要と
する装置側において受信した電圧レベルを基準レベルと
比較し、相手側装置の動作正常性判断およびインク7工
−ス信号受信制御を実行せしめるようにした論理ゲート
構成を少なく共有する周辺装置のインタフェース回路が
得られる。
According to the present invention, between two or more devices connected by an interface signal line, a control voltage monitor line for the internal control power supply is provided to the devices that require each other, and the control voltage monitor line for the power supply for controlling the internal device is provided to the devices that require it. A peripheral device interface circuit that shares a small number of logic gate configurations is obtained, which compares the voltage level with a reference level, determines the operational normality of the other device, and executes the ink service signal reception control.

次に本発明の実施例について図面を参照して説明する。Next, embodiments of the present invention will be described with reference to the drawings.

第1図を参照すると、本発明の第一の実施例は周辺装置
1と、周辺装置を直接制御する制御装置2との間をそれ
ぞれ制御装置2から、周辺装置1へ信号が送信されるイ
ンタフェース信号バス3と制御電圧モニタ線5、逆に周
辺装置1から制御装置2へ信号が送信されるインタフェ
ース信号バス4から構成される。
Referring to FIG. 1, the first embodiment of the present invention provides an interface between a peripheral device 1 and a control device 2 that directly controls the peripheral device, through which signals are transmitted from the control device 2 to the peripheral device 1. It is composed of a signal bus 3, a control voltage monitor line 5, and an interface signal bus 4 through which signals are transmitted from the peripheral device 1 to the control device 2.

周辺装置1は入力電源スィッチ100を介して入力電源
に接続される電源回路101と、制御室、1 ′ 圧モニタ線5からの信号を受は波形整形するフィルタ回
路102と、前記フィルタ回路102からのモニタ信号
すと前記電源回路101からの基準レベルa?入力とし
、弁別信−1jci出力する電圧比較回路103と、イ
ンタフェース信号バス3からの信号を受は内部信号バス
dに出力とする信号受信回路1.04と、前記内部信号
バスdからの信号を入力とし、インタフェース接続命令
信号ef出力するデコーダ回路IQ5牛、前記インタフ
ェース接−命令信号eと弁別信号C?全入力してう、子
回路107のセット入力とする論理積ゲート−回路10
6と、前記セット入力と弁別信号Cのインバー、夕信号
をリセット入力として受信信号イネイブルゲート信号f
を出力するラッチ回路107と、前記ゲート信号fによ
っ、て内部信号バスd上のデータを確定信号バスg上に
出力する論理積ゲート部108と、前記信号バ、スg上
の制御指令およびデータに基づき当該装置動作を実行す
る主制御回路109と、前記動作結果によるステータス
又はデータを内部データバスhにより入力し、インタフ
ェース信号バス4へ中力する信号送信回路110とから
構成される。
The peripheral device 1 includes a power supply circuit 101 connected to an input power supply via an input power switch 100, a filter circuit 102 that receives and shapes the signal from the control room and pressure monitor line 5, and a filter circuit 102 that receives and shapes the signal from the filter circuit 102. The reference level a? from the power supply circuit 101 is monitored by the monitor signal A? A voltage comparison circuit 103 receives the signal from the interface signal bus 3 and outputs the discrimination signal -1jci as input, and a signal receiving circuit 1.04 receives the signal from the interface signal bus 3 and outputs it to the internal signal bus d. A decoder circuit IQ5 inputs the interface connection command signal ef and outputs the interface connection command signal e and the discrimination signal C? AND gate-circuit 10 with all inputs as set inputs of child circuit 107
6, inverting the set input and the discrimination signal C, and using the evening signal as a reset input, a reception signal enable gate signal f.
a latch circuit 107 that outputs the data on the internal signal bus d onto the final signal bus g according to the gate signal f; It is comprised of a main control circuit 109 that executes the device operation based on data, and a signal transmission circuit 110 that inputs status or data based on the operation result via an internal data bus h and outputs it to the interface signal bus 4.

制御装置2は入力電源スィッチ200を介して 5− 入力電源に接続される電源回路201と、該電源回路2
01からの制御電源rf大入力し波形整形の上制御電圧
モニタ線5上へレベル出方を行うフィルタ回路202と
、それぞれ前記制御電源rf回路駆動電源とする制御装
置2の主制御回路203と、その出力内部バスを全入力
としインタフニー5ス信号バス3へ出力する信号送信回
路204と、インタフェース信号バス4からの信号vを
入力とし主制御回路203へ内部バスWにより出力する
信号受信回路205どから構成される。
The control device 2 includes a power supply circuit 201 connected to an input power supply via an input power switch 200;
A filter circuit 202 that inputs a large amount of control power RF from 01, shapes the waveform, and outputs a level onto the control voltage monitor line 5; and a main control circuit 203 of the control device 2, each of which serves as a power source for driving the control power RF circuit. A signal transmitting circuit 204 takes the output internal bus as its input and outputs it to the interface signal bus 3, and a signal receiving circuit 205 takes the signal v from the interface signal bus 4 as its input and outputs it to the main control circuit 203 via the internal bus W. It consists of

次に第2図参照して第1図に示した一実施例の動作例を
説明すると、周辺装置1の電源投Δは制御装置2の電源
投入よりも早く、逆に切断が遅れている。周辺装置1の
電源メイ・ツチ100が投入(ON)され電源回路10
1がまず規定レベル+■に達し動作可能となる。この時
点で制御装置2はまだ切断状態(200=OFF)であ
シ、インタフェース信号バス3上の信号−は不定である
。従って第1図において論理積ゲート群1.08が存在
しない場合、すなわち本発明が適用されていない場合、
6− 前記インタフェース信号バス3上の不定信号が内部バス
dおよびgを通って主制御回路109に与えられ誤った
動作を起こす場合がある。
Next, an example of the operation of the embodiment shown in FIG. 1 will be described with reference to FIG. 2. The power-on of the peripheral device 1 Δ is earlier than the power-on of the control device 2, and conversely, the power-off is delayed. The power supply 100 of the peripheral device 1 is turned on (ON), and the power supply circuit 10
1 first reaches the specified level +■ and becomes operational. At this point, the control device 2 is still in the disconnected state (200=OFF), and the signal on the interface signal bus 3 is undefined. Therefore, if the AND gate group 1.08 does not exist in FIG. 1, that is, if the present invention is not applied,
6- An undefined signal on the interface signal bus 3 may be applied to the main control circuit 109 through the internal buses d and g, causing erroneous operation.

本発明が適用されている第1図、第2図の場合、制御装
置2の電源回路201の出力電圧レベルはフィルタ回路
202によって波形整形及び短絡保護された径制御電圧
モニタ縁5上へ送出される。
In the case of FIGS. 1 and 2 to which the present invention is applied, the output voltage level of the power supply circuit 201 of the control device 2 is sent onto the diameter control voltage monitor edge 5 which is shaped and short-circuit protected by the filter circuit 202. Ru.

周辺装置2側では制御電圧モニタ線5上の電圧レベルS
をフィルタ回路102によってリップル処理を施し次に
電圧比較回路103において基準電圧aと比較する。
On the peripheral device 2 side, the voltage level S on the control voltage monitor line 5
is subjected to ripple processing by a filter circuit 102, and then compared with a reference voltage a in a voltage comparison circuit 103.

制御装置2が電源投入され出力電圧レベルrが立ち上る
と周辺装置lの比較レベル信号すとして検出され、基準
レベルaf超えると弁別信号Cが駆動されインタフェー
スイネイブルゲート用う。
When the control device 2 is powered on and the output voltage level r rises, it is detected as a comparison level signal of the peripheral device 1, and when it exceeds the reference level af, the discrimination signal C is driven and the interface enable gate is used.

子回路107のセット条件が成立する。制御装置  ゛
例2の論理制御回路203.お1よび信号送信回路20
4が確定してインタフェースイネイブル命令信号がイン
タフェース信号バス3および受信回路104を介してデ
コーダ回路105に与えられるとセット指令信号eが論
理積ゲート回路106に与えられ次でラッチ回路107
eセツトする。インタフェースイネイブルのセット状態
はゲート信号fによって論理積ゲート群108に与えら
れ以後、インタフェース信号バス3の内容Uは内部バス
dおよびgt”経て主制御回路109に与えられ、以後
制御装置2からのインタフェース信号バス3との指令に
基づき動作する。次に制御装置2の電源切断(20,0
→0FF)が生じると投入時とは逆に市制御装置2の回
路動作用電源電圧rの低下は制御電圧モニタ線5を介し
て電圧比較回路103で検出され、基準レベルaf下ま
わると弁別信号Cがディスエイプルされ、インタフェー
スイネイブル用う、子回路107をリセットし、従って
論理積ゲート群108のゲート人力fは閉じられる。
The set condition for child circuit 107 is satisfied. Control device Logic control circuit 203 of Example 2. 1 and signal transmission circuit 20
4 is determined and the interface enable command signal is given to the decoder circuit 105 via the interface signal bus 3 and the receiving circuit 104, the set command signal e is given to the AND gate circuit 106, and then the latch circuit 107
eSet. The set state of the interface enable is given to the AND gate group 108 by the gate signal f, and after that, the content U of the interface signal bus 3 is given to the main control circuit 109 via the internal buses d and gt'', and thereafter the content U from the control device 2 It operates based on commands from the interface signal bus 3. Next, the control device 2 is powered off (20, 0
→0FF), a drop in the power supply voltage r for circuit operation of the city control device 2 is detected by the voltage comparator circuit 103 via the control voltage monitor line 5, and when it falls below the reference level af, a discrimination signal is sent. C is disabled and uses the interface enable to reset the child circuit 107, so that the gate f of AND gate group 108 is closed.

もし本機能が存在しない場合、すなわち本発明が適用さ
れない場合1.制御装置2の電源切断に伴うインタフェ
ース信有バス3上の不定信号が周辺装置1の主制御回路
109に与えられ誤った動作を行う場合がある。
If this function does not exist, that is, the present invention is not applied: 1. When the control device 2 is powered off, an undefined signal on the interface communication bus 3 is applied to the main control circuit 109 of the peripheral device 1, which may cause an erroneous operation.

第3図は本発明を適用した周辺装置と制御装置間インタ
フェース信号構成の他の実施例を示すもので、第3図(
a)は第1図の実施例と同じもの、第3図(b)は周辺
装置1から制御装置2への制御電圧モニタ線が追加され
たもの、第3図(C)は第3図(b)の構成に加えて更
に上位制御装置7がある場合でこの場合各インタフェー
スチェ、りは対向する1−2間、2−3間で行われる例
を示している。
FIG. 3 shows another embodiment of the interface signal configuration between a peripheral device and a control device to which the present invention is applied.
3(a) is the same as the embodiment in FIG. 1, FIG. 3(b) is the one in which a control voltage monitor line from the peripheral device 1 to the control device 2 is added, and FIG. 3(C) is the same as the embodiment in FIG. In addition to the configuration of b), there is also an upper control device 7, and in this case each interface check is performed between opposing units 1 and 2 and 2 and 3.

本発明は以上説明したように相手側装置の制御用電源電
圧をインタフェース線により取込み、電圧比較を行うこ
とによシ相手側装置からのインタフェース信号の確定状
態を弁別し、他の制御インタフェース信号の論理ゲート
制御を確実にする効果がある。
As explained above, the present invention takes in the control power supply voltage of the other device through the interface line and compares the voltages, thereby distinguishing the established state of the interface signal from the other device and determining the status of the other control interface signal. This has the effect of ensuring logic gate control.

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

第1図は本発明の第一の実施例をプロ、り図で示した回
路図、第2図は第1図に示した第一の実施例による本発
明の動作タイミングチャートラ示す図、第3図は本発明
の他の実施例を説明したプ9− プロ、り図である。 I・・・・・・周辺装置、2・・川・制御装置、3,4
・・・・・・インタフェース信号バス、5.6・・・・
・・制御電圧モニタ線、7・・印・他の制御装置、10
0,200・・・・・・入力電源スィッチ、101,2
01・山・・電源回路、102,202・・・・・・フ
ィルタ回路、1031.。 ・・・電圧比較回路、104.205・・・・・・信号
受信回路、105・・・・・・デコーダ回路、106・
・川・論理積ゲート回路、107・・印・ラッチ回路、
108・・印・論理積ゲート群、109.203・・・
・・・主制御回路、110.204・・・・・・信号送
信回路。 代理人 弁理士  内 原   晋 −1〇− 事 2 回 (aン      。 (6) 苧3図
1 is a circuit diagram showing a first embodiment of the present invention in a professional diagram; FIG. 2 is a diagram showing an operation timing chart of the present invention according to the first embodiment shown in FIG. 1; FIG. 3 is a diagram illustrating another embodiment of the present invention. I... Peripheral device, 2... River/control device, 3, 4
...Interface signal bus, 5.6...
・・Control voltage monitor line, 7・・Other control device, 10
0,200...Input power switch, 101,2
01・mountain...power supply circuit, 102,202...filter circuit, 1031. . ... Voltage comparison circuit, 104.205 ... Signal receiving circuit, 105 ... Decoder circuit, 106.
・River・AND gate circuit, 107・・mark・Latch circuit,
108...mark/AND gate group, 109.203...
...Main control circuit, 110.204...Signal transmission circuit. Agent Patent Attorney Susumu Uchihara - 10 - 2 times (aan. (6) 3 pictures

Claims (1)

【特許請求の範囲】 複数のインタフェース信号線から構成される装置 ース回路において、当該装置のいずれか一方または両装
置の内.部制御回路動作用電源電圧しベル金、少なく共
短絡保謹手段を介して相手側装置へ送出する制御電圧モ
ニタ線を付加し、これを受信する装置内に前記制御電圧
モニタ線上の電圧比較回路手段とその出力信号によシ相
手先装置からの他のインタフェース送信信号を弁別する
手段とを有することを特徴とする周辺装置のインタフェ
ース回路。
[Scope of Claims] In a device-based circuit composed of a plurality of interface signal lines, one or both of the devices. A control voltage monitor line is added to the power supply voltage for operation of the control circuit, and a control voltage monitor line is added to send out to the other device via short-circuit protection means, and a voltage comparison circuit on the control voltage monitor line is installed in the device that receives this line. 1. An interface circuit for a peripheral device, comprising means for discriminating another interface transmission signal from a destination device based on the output signal thereof.
JP57083492A 1982-05-18 1982-05-18 Interface circuit of peripheral device Pending JPS58200322A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP57083492A JPS58200322A (en) 1982-05-18 1982-05-18 Interface circuit of peripheral device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57083492A JPS58200322A (en) 1982-05-18 1982-05-18 Interface circuit of peripheral device

Publications (1)

Publication Number Publication Date
JPS58200322A true JPS58200322A (en) 1983-11-21

Family

ID=13803972

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57083492A Pending JPS58200322A (en) 1982-05-18 1982-05-18 Interface circuit of peripheral device

Country Status (1)

Country Link
JP (1) JPS58200322A (en)

Similar Documents

Publication Publication Date Title
US6681013B1 (en) Power feeding system for telephone terminal in LAN
US20020169915A1 (en) USB connection-detection circuitry and operation methods of the same
CA2225972C (en) Power supply system
CN108732452A (en) The communication detecting method and device of air-conditioning system and its current-loop communication circuit
CN110032533A (en) C-type universal serial bus interface circuit and its pin by-pass method
JP2753915B2 (en) Communication control device
US6697966B1 (en) Data bus for a plurality of nodes
JPS58205353A (en) Data trnsmitting system
JPS6110340A (en) Input/output communication system of programmable controller
JPS58200322A (en) Interface circuit of peripheral device
CN114296976A (en) I2C communication fault recovery method and system
JP5371651B2 (en) Vehicle power supply system and communication device
US6412016B1 (en) Network link bypass device
US8671300B2 (en) Processing unit, process control system and control method
JP2001245476A (en) Power source device
JP5374025B2 (en) Differential transmission equipment
JPS583541A (en) Double control circuit for ac power source
EP4329247A1 (en) Controller area network transceiver and method for the transceiver
JP3973476B2 (en) Status transmission using frequency
JPH07327329A (en) Uninterruptible power supply
JPS59224938A (en) Network system
JPH0728303B2 (en) Stationary dual configuration control system
JP3543438B2 (en) Printer control device
JP2570994B2 (en) Alarm signal communication device
JP2851085B2 (en) Terminal power off detection method