JPS62222346A - Serial interface element - Google Patents

Serial interface element

Info

Publication number
JPS62222346A
JPS62222346A JP61066759A JP6675986A JPS62222346A JP S62222346 A JPS62222346 A JP S62222346A JP 61066759 A JP61066759 A JP 61066759A JP 6675986 A JP6675986 A JP 6675986A JP S62222346 A JPS62222346 A JP S62222346A
Authority
JP
Japan
Prior art keywords
rs232c
receiver
driver
serial interface
interface element
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
JP61066759A
Other languages
Japanese (ja)
Inventor
Junichi Mito
三戸　純一
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP61066759A priority Critical patent/JPS62222346A/en
Publication of JPS62222346A publication Critical patent/JPS62222346A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
    • G06F13/38—Information transfer, e.g. on bus
    • G06F13/40—Bus structure
    • G06F13/4063—Device-to-bus coupling
    • G06F13/4068—Electrical coupling
    • G06F13/4072—Drivers or receivers

Abstract

PURPOSE:To miniaturize a serial interface element by mounting circuit elements having receiver or driver functions, which satisfy both standards of RS232C and RS422, on one package and selecting both functions with an external switching signal. CONSTITUTION:An RS232C receiver A, an RS232C driver C, an RS422 receiver B, an RS422 driver D, and an RS232C/RS422 receiver switching inverter E are provided in an IC. An RS232C/RS422 changeover switch SW is connected to the inverter E, and the switching signal input is given to the switch SW to perform the function switching control.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、Ｅ　Ｉ　Ａ　（Ｅｌｅｃｔｒｏｎｉｃ　Ｉ
ｎｄｕｓｔｒｉｅｓＡｓｓｏｃｉａｔｉｏｎ　）規格で
制定しているＲＳ２３２Ｃ及びＲＳ４２２のインタフェ
ース素子（以下、ＩＣという）に関するものである。[Detailed Description of the Invention] [Industrial Application Field] This invention is based on EIA (Electronic IA).
The present invention relates to RS232C and RS422 interface elements (hereinafter referred to as ICs) that have been established in the industry association standards.

〔従来の技術〕[Conventional technology]

第２図は従来のこの種ドライバＩＣの内部構成を示すも
ので、図において、１はＲＳ２３２Ｃ用のドライバＩＣ
，２はレシーバＩＣ，３はＲＳ４２２用のドライバＩＣ
，４はレシーバＩＣである。Figure 2 shows the internal configuration of a conventional driver IC of this type. In the figure, 1 is a driver IC for RS232C.
, 2 is a receiver IC, 3 is a driver IC for RS422
, 4 is a receiver IC.

これらのＩＣを使用して、ＲＳ２３２ＣとＲＳ４２２の
両規格を満足するハードウェアを作成しようとする場合
には、例えば第３図のような回路構成が考えられる。こ
の場合は送信データと受信データだけＲＳ２３２ＣとＲ
Ｓ４２２の規格に適合させようとしたもので、第２図に
示した４種のインタフェースＩＣを全て使用することに
なる。When attempting to create hardware that satisfies both the RS232C and RS422 standards using these ICs, a circuit configuration as shown in FIG. 3, for example, can be considered. In this case, only the sending data and receiving data are RS232C and R.
This is intended to comply with the S422 standard, and all four types of interface ICs shown in FIG. 2 will be used.

次に動作について説明する。まず、第３図の回路動作と
して、シリアルインタフェースＬＳｉＩ５は送信しよう
とするデータを出力端子ＴＤから出力する。前記により
出力されたデータはＲＳ２３２Ｃドライバ６及びＲＳ４
２２ドライバ７に入り、電圧レベルの変換がおこなわれ
、それぞれＲＳ２３２Ｃ送信データＳ１及びＲＳ４２２
送傷データＳ２となる。一方、受信データは、外部から
入力された几８２３２Ｃ受信データ凡１及びＲＳ４２２
受信データＲ２をＲＳ２３２Ｃレシーバ８及び几Ｓ４２
２レシーバ９によって受信するとそれぞれＴＴＬレベル
のデータに変換する。切換スイッチ１０ば、８８２３２
Ｃ及びＲＳ４２２のインタフェース切換を行うものであ
る。Next, the operation will be explained. First, as the circuit operation shown in FIG. 3, the serial interface LSiI5 outputs data to be transmitted from the output terminal TD. The data outputted above is sent to the RS232C driver 6 and RS4.
22 driver 7, voltage level conversion is performed, and the RS232C transmission data S1 and RS422 transmission data are respectively
This becomes the injury data S2. On the other hand, the received data is 8232C received data and RS422 input from the outside.
The received data R2 is sent to the RS232C receiver 8 and the receiver S42.
When received by the two receivers 9, they are converted into TTL level data. Changeover switch 10, 88232
This is used to switch between C and RS422 interfaces.

また、第２図において具体的ＩＣ名としてはＲＳ２３２
ＣレシーバＩＣＩの例として、５Ｎ７５１８９、几８２
３２０ドライバＩＣ２０例として５Ｎ７５１８８、ＲＳ
４２２レシーバＩＣ３の例としてＡｍ２６ＬＳ３２、Ｒ
Ｓ４２２ドライバＩＣ４の例としてＡｍ２６Ｌ８３１等
があげられる。In addition, in Figure 2, the specific IC name is RS232.
As an example of C receiver ICI, 5N75189, 几82
320 driver IC20 example 5N75188, RS
Am26LS32,R as an example of 422 receiver IC3
An example of the S422 driver IC 4 is Am26L831.

〔発明が解決しようとする問題点〕[Problem that the invention seeks to solve]

従来のシリアルインタフェース素子は以上のように構成
されているので、ｇＩＡ規格の１（，８２３２Ｃ，！：
ＲＳ４２２両者のインタフェースを備えたハードウェア
を作成しようとするとＩＣチップの数が多くなシ、ハー
ドウェアの形状が大きくなり、価格も高価となるのを免
れ得ない等の問題点があった。Since the conventional serial interface element is configured as described above, it complies with gIA standard 1(,8232C,!:
If you try to create hardware that has both RS422 and RS422 interfaces, there are problems such as a large number of IC chips, a large hardware size, and an unavoidable high price.

この発明は上記のような問題点を解消するためになされ
たもので、ＲＳ２３２Ｃ及びＲＳ４２２の両規格に適合
したドライバ・レシーバを含むＩＣとすることによりハ
ードウェアの形状を小形化し、コストの低下を図ること
を目的とする。This invention was made to solve the above problems, and by creating an IC that includes a driver/receiver that complies with both RS232C and RS422 standards, it is possible to reduce the size of the hardware and reduce costs. The purpose is to

〔問題点を解決するだめの手段〕[Failure to solve the problem]

この発明に係るシリアルインタフェースＩＣはＥＩＡ規
格ＲＳ２３２Ｃ、Ｒ，８４２２両規格に適合するドライ
バ・レシーバを１個のＩＣ内に形成し、ＩＣ外部からの
切換信号によｐＲＳ２３２ＣとＲＳ４２２の切換えが出
来る機能を持たせるようにしたものでおる。The serial interface IC according to the present invention has a driver/receiver that complies with both EIA standards RS232C, R, and 8422 in one IC, and has a function that allows switching between pRS232C and RS422 using a switching signal from outside the IC. It's something you can hold.

〔作　用〕[For production]

この発明におけるシリアルインタフェースＩＣは、ＲＳ
２３２ＣドライバーレンーパとｆＬＳ４２２のドライバ
・レシーバとを１パッケージ化することにより、ＲＳ２
３２ＣとＲＳ４２２の両者のインタフェース機能を持つ
ＩＣとする。The serial interface IC in this invention is RS
By integrating the 232C driver receiver and the fLS422 driver/receiver into one package, the RS2
The IC has interface functions for both 32C and RS422.

〔実施例〕〔Example〕

以下、この発明の一実施例を図につ員て説明する。図中
、第３図と同一の部分は同一の符号をもって図示した第
１図において、人はＲＳ２３２Ｃレシーバ、ＢはＲＳ４
２２レシーバ、ＣはＲＳ２３２Ｃドライバ、ＤはＲＳ４
２２ドライバ、ＥはＲＳ２３２Ｃ／Ｒ，８４２２レシー
バ切換用インバータである。また、ＳＷはＲＳ２３２Ｃ
／ＲＳ４２２切換スイツチ、ＳＳはシリアル送信データ
、ＳＲはシリアル受信データである。An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, the same parts as in FIG. 3 are designated by the same reference numerals. In FIG.
22 receiver, C is RS232C driver, D is RS4
22 driver, and E is an inverter for switching between RS232C/R and 8422 receivers. Also, SW is RS232C
/RS422 changeover switch, SS is serial transmission data, and SR is serial reception data.

本発明によるシリアルインタフェースＩＣを使用した場
合、第３図と同様な構成をハードウェアで構成すると、
シリアルインタフェースＬＳＩと本発明によるＩＣと終
端抵抗だけになシ、大巾にＩＣを削減出来る。When using the serial interface IC according to the present invention, if a configuration similar to that shown in FIG. 3 is constructed using hardware,
By using only the serial interface LSI, the IC according to the present invention, and the terminating resistor, the number of ICs can be greatly reduced.

次に本発明の回路動作は、従来例における回路動作と同
じであるが、本発明によるＩＣにＲＳ２３２Ｃ／凡５４
２２切換ＳＷ信号入力を与えることにより容易に機能切
換え制御を行うことができる。Next, the circuit operation of the present invention is the same as the circuit operation of the conventional example, but the IC according to the present invention has RS232C/54
Function switching control can be easily performed by providing the 22 switching SW signal input.

なお、上記実施例では、ＩＣ内部にＲＳ２３２Ｃドライ
バ・レシーバ、ＲＳ４２２ドライバ・レシーバを各１個
ずつ実装した例について示したが、用途によって実装個
数は何個入っていても良い。In the above embodiment, an example was shown in which one RS232C driver/receiver and one RS422 driver/receiver were mounted inside the IC, but any number of them may be mounted depending on the purpose.

〔発明の効果〕〔Effect of the invention〕

以上のように、この発明によれば、ＲＳ２３２Ｃドライ
バ・レシーバ、ＲＳ４２２ドライバーレシーバを１チツ
プ内に収納するようにしたので、ＲＳ２３２ＣとＲＳ４
２２の両者のインク７エースに対応したハードウェアが
必要とされる場合にハードウェアの形状を小型に出来、
かつ低価格のものを構成することが出来る効果がある。As described above, according to the present invention, since the RS232C driver/receiver and the RS422 driver/receiver are housed in one chip, the RS232C and RS4
If hardware compatible with both Ink 7 Ace of 22 is required, the shape of the hardware can be made smaller,
Moreover, it has the effect of being able to be constructed at a low cost.

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

第１図は本発明の一実施例によるシリアルインタフェー
ス素子の回路図、第２図は従来のＲＳ２３２Ｃドライバ
ーレシーバ、ＲＳ４２２ドライバ・レシーバＩＣの内部
構成図、第３図はＲＳ２３２ＣとＲＳ４２２の両者のイ
ンタフェースを備えたハードウェアのブロック図である
。 図において、ＡはＲＳ２３２Ｃレシーバ、ＢはＲＳ４２
２レシーバ、ＣはＲＳ２３２Ｃドライバ、Ｄは凡５４２
２ドライバ、ｇｉＪ、ＲＳ　２３２ｃ７ｎｓ４２２切換
用インバータである。 Ａ　：　Ｒ５２３２ＣＩ、″／−ハ゛−Ｂ　：　Ｒ５４
２２レンーハパ− Ｃ：　ＲＳ２”３２Ｃドライバー ０、Ｒ５４２２１”ライ八“− Ｅ　：Ｒ５２３２Ｃ／Ｒ５４２２切’ｆ’＊ＭイアＢ”
−１３第２図Fig. 1 is a circuit diagram of a serial interface element according to an embodiment of the present invention, Fig. 2 is an internal configuration diagram of a conventional RS232C driver receiver and RS422 driver/receiver IC, and Fig. 3 shows an interface between both RS232C and RS422. It is a block diagram of the hardware provided. In the figure, A is the RS232C receiver, B is the RS42
2 receivers, C is RS232C driver, D is about 542
2 driver, giJ, RS 232c7ns422 switching inverter. A: R5232CI, ″/-high-B: R54
22lenhapa-C: RS2"32C driver 0, R54221"Ray eight"-E: R5232C/R5422 cut 'f'*M ear B"
-13 Figure 2

Claims (1)

【特許請求の範囲】[Claims] ＲＳ２３２ＣまたはＲＳ４２２用ドライバ・レシーバ機
能を有するシリアルインタフェース素子において、前記
ＲＳ２３２ＣまたはＲＳ４２２の両規格を満足するレシ
ーバまたはドライバ機能を有する回路素子を１パッケー
ジに実装し、ＲＳ２３２Ｃ・ＲＳ４２２切換外部信号に
より前記両機能の選択を行いうるように前記回路素子を
構成したことを特徴とするシリアルインタフェース素子
。In a serial interface element having a driver/receiver function for RS232C or RS422, a circuit element having a receiver or driver function that satisfies both the RS232C or RS422 standards is mounted in one package, and both functions can be controlled by an external signal for switching between RS232C and RS422. 1. A serial interface device, characterized in that said circuit device is configured so as to be able to select.
JP61066759A 1986-03-25 1986-03-25 Serial interface element Pending JPS62222346A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP61066759A JPS62222346A (en) 1986-03-25 1986-03-25 Serial interface element

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP61066759A JPS62222346A (en) 1986-03-25 1986-03-25 Serial interface element

Publications (1)

Publication Number Publication Date
JPS62222346A true JPS62222346A (en) 1987-09-30

Family

ID=13325130

Family Applications (1)

Application Number Title Priority Date Filing Date
JP61066759A Pending JPS62222346A (en) 1986-03-25 1986-03-25 Serial interface element

Country Status (1)

Country Link
JP (1) JPS62222346A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100607292B1 (en) * 1998-12-28 2006-09-28 삼성탈레스 주식회사 Serial communication auto selection device_
US7206592B1 (en) * 1990-02-26 2007-04-17 Broadcom Coporation System for coupling a multiplicity of RF data collection terminals with host computer means

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7206592B1 (en) * 1990-02-26 2007-04-17 Broadcom Coporation System for coupling a multiplicity of RF data collection terminals with host computer means
KR100607292B1 (en) * 1998-12-28 2006-09-28 삼성탈레스 주식회사 Serial communication auto selection device_

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