JPS58175058A - Reader and writer for ic card - Google Patents

Reader and writer for ic card

Info

Publication number
JPS58175058A
JPS58175058A JP57056440A JP5644082A JPS58175058A JP S58175058 A JPS58175058 A JP S58175058A JP 57056440 A JP57056440 A JP 57056440A JP 5644082 A JP5644082 A JP 5644082A JP S58175058 A JPS58175058 A JP S58175058A
Authority
JP
Japan
Prior art keywords
card
electrodes
writer
short
reader
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.)
Granted
Application number
JP57056440A
Other languages
Japanese (ja)
Other versions
JPS648395B2 (en
Inventor
Seiichi Nishikawa
誠一 西川
Koichi Okada
浩一 岡田
Teruaki Jo
輝明 城
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.)
Dai Nippon Printing Co Ltd
Original Assignee
Dai Nippon Printing 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 Dai Nippon Printing Co Ltd filed Critical Dai Nippon Printing Co Ltd
Priority to JP57056440A priority Critical patent/JPS58175058A/en
Publication of JPS58175058A publication Critical patent/JPS58175058A/en
Publication of JPS648395B2 publication Critical patent/JPS648395B2/ja
Granted legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00Error detection; Error correction; Monitoring

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
  • Techniques For Improving Reliability Of Storages (AREA)
  • Test And Diagnosis Of Digital Computers (AREA)

Abstract

PURPOSE:To prevent malfunction due to a short-circuited electrode, and damage of the IC chip in an IC card, by starting the transfer of data after confirming that no continuity takes place among electrodes. CONSTITUTION:When the IC card is set to a prescribed position of a reader/ writer for the IC card, the electrodes 1(Q1-Q8) of the IC card are in contact with contact electrodes 2(P1-P8) of the reader/writer for the IC card. Before data are transferred between the reader/writer for the IC card and the IC card itself, a probe signal PB is outputted from a control circuit 20, and a short- circuit detection circuit 10 checks whether or not any short-circuiting exists between arbitrary two sets of contact electrodes P1-P8. When no short-circuiting exists among the contact electrodes, no short-circuit signal NS is outputted to a control circuit 20 and data is transferred via the control circuit 20.

Description

【発明の詳細な説明】 この発明はICカード用リーダ・ライタに関する。[Detailed description of the invention] The present invention relates to an IC card reader/writer.

近年、磁気カードの代りK IC(集積回路)チップを
カードに組込んだICカードが利用されるようになって
いる。しかして、ICカードにデータを書込んだり、I
Cカードからデータを読込んだすするICカード用リー
ダ・ライタ忙おいては、ICカードをリーダ・ライタの
所定位置にセットした後、ICカードのセット位置を光
電スイッチ郷で検出し、セット状態が正常か否かの確認
を行なってからICカードとの間でデータ転送を開始す
るようにしている。この場合、ICカードにはり数個の
電極が設けられており、これらt極とリーダ・ライタの
コンタクト電極とを電気的に接触させることKより、相
互にデータの転送を行ない得るようにしているが、IC
カード上のt極の間に導電性の物質が付着し、2つの電
極間に短絡を生じさせるような場合、ICカードとり−
ダ・ライタとの間でデータ転送が正常に行なわれないと
いう欠点があった。また、場合によっては、電源電圧が
ICカードの正規の電極以外の電極に印加されてしまい
、ICカード内のICチップの破壊につながるという恐
れがあった= 第1図はかかる従来のICカードとリーダ・ライタとの
電極接続の様子を示す図であり、ICカードの平面状の
電極1(Q1〜Q8 )にリーダ・2イタの棒状のコン
タクト電極2(P1〜P8 )を相互に接触させるよう
にしている。したがって、正常時においてはICカード
側の電極Q1〜Q8とリーグ・ライタ側の電極P1〜P
8との間で相互にデータの転送が行なわれる。しかしな
がら、たとえば図に示す如(ICカード側の電極Q1と
Q5との間に導電性の不純物3が付着した場合には、電
極QlとQ5とが電気的に短絡してしまうので、電極P
I−Ql 、 P5−Q5の間におけるデータの転送が
正常に行なわれないことになる。また、場合によっては
ICカード上の正規の電極以外の電極に電源電圧が印加
されてしまい、ICカード内のICチップを破損してし
まうといった恐れもある。よって、この発明の目的は、
上述の如き欠点のないICカード用のリーダ・ライタを
提供することにある。
In recent years, instead of magnetic cards, IC cards in which a KIC (integrated circuit) chip is incorporated into the card have come into use. However, when writing data to an IC card,
When an IC card reader/writer is busy reading data from a C card, after setting the IC card in a predetermined position on the reader/writer, the photoelectric switch detects the set position of the IC card and confirms the set status. Data transfer between the IC card and the IC card is started after checking whether it is normal or not. In this case, the IC card is provided with several electrodes, and by electrically contacting these T-poles with the contact electrodes of the reader/writer, data can be transferred between them. However, IC
If a conductive substance adheres between the T-poles on the card and causes a short circuit between the two electrodes, the IC card
There was a drawback that data transfer between the data and the writer could not be performed normally. In addition, in some cases, the power supply voltage may be applied to electrodes other than the regular electrodes of the IC card, which may lead to destruction of the IC chip inside the IC card. This is a diagram showing how the electrodes are connected to the reader/writer, and the planar electrodes 1 (Q1 to Q8) of the IC card are brought into contact with the rod-shaped contact electrodes 2 (P1 to P8) of the reader/writer. I have to. Therefore, under normal conditions, electrodes Q1 to Q8 on the IC card side and electrodes P1 to P on the league writer side.
Data is transferred to and from 8. However, as shown in the figure (for example, if conductive impurity 3 adheres between electrodes Q1 and Q5 on the IC card side, electrodes Ql and Q5 will be electrically short-circuited, so electrode P
Data transfer between I-Ql and P5-Q5 will not be performed normally. Further, in some cases, the power supply voltage may be applied to electrodes other than the regular electrodes on the IC card, and there is a risk that the IC chip in the IC card may be damaged. Therefore, the purpose of this invention is to
The object of the present invention is to provide a reader/writer for IC cards that does not have the above-mentioned drawbacks.

以下にこの発明を説明する。This invention will be explained below.

この発明は、挿入されたICカードの複数個の電極と相
互に接触するようにコンタクト電極を配設されたICカ
ード用リーダ・ライタに関し、第2図に示すように、複
数個の電極(Ql〜Q8 )のうちの任意の2組の関に
おける電気的短絡を、コンタクト電極P1〜P8を介し
て検出するための短絡検出回路10を設けたものである
。すなわち、ICカードがICカード用リーダ・ライタ
の所定位置にセットされると、ICカードの電極1(Q
1〜Q8)はICカード用リーダ・ライタのコンタクト
電極2(P1〜P8 )に接触する。そし2て、ICカ
ードとICカード用リーダ・ライタとの間でデータの転
送を行なう前に、制御回路かからプローブ信号FBを出
力し、短絡検出回路10によってコンタクト電極P1〜
P8の任意の2組の間で電気的な短絡があるか否かを検
査し、いずれのコンタクト電極の間においても短絡がな
い場合には短絡信号NSを制御回路加に出力せず、その
後に制御回路加を介してデータ転送を行なうようKする
。しかして、挿入されたICカードの電極Q1〜Q8の
間で、たとえばI!1図に示すような導電性の不純物3
が付着している場合には、コノタクト電極P1とP5と
の間で電気的な短絡が生じるので、短絡検出回路10は
短絡信号N8を出力する。これにより、制御回路加はコ
ンタクト電極P1〜P8を介してICカードとの間でデ
ータの転送を行なうことができない。
The present invention relates to an IC card reader/writer in which a contact electrode is arranged so as to be in mutual contact with a plurality of electrodes of an inserted IC card, and as shown in FIG. -Q8) A short-circuit detection circuit 10 is provided for detecting an electrical short-circuit between any two sets of contacts through contact electrodes P1-P8. That is, when the IC card is set in the predetermined position of the IC card reader/writer, electrode 1 (Q
1 to Q8) contact the contact electrodes 2 (P1 to P8) of the IC card reader/writer. 2. Then, before data is transferred between the IC card and the IC card reader/writer, the control circuit outputs the probe signal FB, and the short circuit detection circuit 10 detects the contact electrodes P1 to P1.
It is checked whether there is an electrical short circuit between any two pairs of P8, and if there is no short circuit between any of the contact electrodes, the short circuit signal NS is not output to the control circuit, and then K so that data transfer is performed via the control circuit. For example, I! between the electrodes Q1 to Q8 of the inserted IC card. 1 Conductive impurity 3 as shown in Figure 1
is attached, an electrical short circuit occurs between the contact electrodes P1 and P5, and the short circuit detection circuit 10 outputs a short circuit signal N8. As a result, the control circuit cannot transfer data to or from the IC card via the contact electrodes P1 to P8.

次K、短絡検出回路10の詳細を第3図に示し、その動
作を第4図(5)〜(I)のタイムチャートを参照して
説明する。
Next, the details of the short circuit detection circuit 10 are shown in FIG. 3, and its operation will be explained with reference to the time charts of FIGS. 4 (5) to (I).

短絡検出回路10は第3図に示すように、コノタクト電
極P1〜P8のうちの7つなそれぞれ入力するオアグー
) ORI〜OR8と、当該オアゲートに入力されてい
ないt他信号N1〜N8によってオンオフされるトライ
・ゲートq1〜G8と、これらトライ・ゲート01〜G
8の論理和を得るオアゲートOR9と、このオアグー)
 OR9及びグローブ信号PHの論理積を得るアンドゲ
ートに山とで構成されている。なお、トライ・グー)G
l〜G8はそれぞれゲート信号(Nl〜N8 )がrH
Jレベルの時にオンされるようになっている。
As shown in FIG. 3, the short circuit detection circuit 10 is turned on and off by ORI to OR8 which are input to seven of the contact electrodes P1 to P8, respectively, and other signals N1 to N8 which are not input to the OR gates. tri-gates q1 to G8, and these tri-gates 01 to G
OR gate OR9 that obtains the logical sum of 8 and this ORGOO)
It consists of an AND gate that obtains the logical product of OR9 and the globe signal PH, and a mountain. In addition, Try Goo) G
The gate signals (Nl to N8) of l to G8 are rH.
It is designed to be turned on when you are at J level.

しかして、第4図(5)に示す如きグローブ信号FBが
制御回路加から出力されると共に、グローブ信号FBが
rHJレベルとなっている関に同図串)〜(I)に示す
如き電極信号N1〜へ8が順次出力される。したがって
、たとえば電極信号へ1が出力されている場合を考える
と、トライ・ゲートG1がオンされるので、オアグー)
 ORIの出力がオアゲートω匈を軽てアンドゲートに
Φに入力されることになる。ここに、電極信号N1が出
力されている時に、コンタクト電極P1と他の電極P2
〜P8とが短絡されていなければ、オアグー) ORI
の出力はrLJレベルであり、結局アンドゲートAND
の出力はrLJレベルであり短絡信号N8は出力されな
い。これに対し、コンタクトt&P1と他の電極P2〜
P8のいずれかとが不純物等によって短絡されていると
、オアゲートORIの出力がrHJレベルとなることに
より短絡信号NSが出力される。このような短絡検査を
順次電極P2゜P3.・・・P8について検査すること
により、グローブ信号PBが出力されている間の全ての
電極P1〜P8 Kついての検査を行なうことができる
Thus, the globe signal FB as shown in FIG. 8 are sequentially output to N1 to N1. Therefore, for example, if we consider the case where 1 is output to the electrode signal, tri-gate G1 is turned on, so
The output of ORI is inputted to Φ through the OR gate ω and the AND gate. Here, when the electrode signal N1 is output, the contact electrode P1 and the other electrode P2
~If P8 is not short-circuited, OAG) ORI
The output of is rLJ level, and after all it is an AND gate AND
The output is at the rLJ level, and the short circuit signal N8 is not output. On the other hand, contact t&P1 and other electrodes P2~
If either P8 is short-circuited due to impurities or the like, the output of the OR gate ORI becomes rHJ level, and a short-circuit signal NS is output. Such a short circuit test is performed sequentially on electrodes P2, P3. By inspecting P8, all electrodes P1 to P8K can be inspected while the globe signal PB is being output.

以上のようKこの発明のICカード用リーダ・ライタに
よれば、ICカード上の電極間に付着した導電性の物質
の付着によつ【生じる短絡動作をそのデータ転送に先だ
って検査し、いずれの電極の間においても導通が生じて
いないことを確認してからデータの転送を開始するよう
にしているので、電極の短絡による誤動作や、ICカー
ド内のICチップの破損を生じるといったこともない。
As described above, according to the IC card reader/writer of the present invention, the short-circuit operation caused by the adhesion of a conductive substance between the electrodes on the IC card is inspected prior to data transfer, and any Since data transfer is started after confirming that there is no conduction between the electrodes, there is no possibility of malfunction due to electrode short-circuiting or damage to the IC chip in the IC card.

なお、上述の夾流側においてはICカードの電極及びI
Cカード用リーグ・ライタのコンタクト電極の数をそれ
ぞれ8個としているが、これら電極の数は任意であり、
それら形状、配列も任意である。また、上述の冥流側で
は電極のうちの任意の2つの組合せ全てについて短絡が
あるか否かを検査するようにしているが、互いに隣接す
る2つの電極の組合せについてだけ検査するようにして
も同様の効果を得ることができる。
In addition, on the above-mentioned discharge side, the electrodes of the IC card and the I
The number of contact electrodes of each C card league writer is 8, but the number of these electrodes is arbitrary.
Their shape and arrangement are also arbitrary. In addition, on the undercurrent side described above, all combinations of any two electrodes are tested for short circuits, but it is also possible to test only the combinations of two adjacent electrodes. A similar effect can be obtained.

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

第1図はICカードの電極とICカード用り−ダ・ライ
タのコンタクト電極との接触の様子な示す図、第2図は
この発明の一実施例を示すブロック図、第3図はこの発
明に用いる短絡検出回路の一例を示す回路図、第4図(
5)〜(I)はその動作例を示すタイミングチャートで
ある。 1(Q1〜Q8 )用電極、2 (PIA、P6A 。 PIB〜P6B )・・・コンタクト電極、3・・・不
純物、10・・・短絡検出回路、加・・・制御回路。 邑願人代理人   安  形  雄  三烙 3 区 弔4!2 (A)PB−「=1 (F)  N5 −ロー
Fig. 1 is a diagram showing the state of contact between the electrode of the IC card and the contact electrode of the IC card reader/writer, Fig. 2 is a block diagram showing an embodiment of the present invention, and Fig. 3 is a diagram showing the contact electrode of the IC card reader/writer. Figure 4 is a circuit diagram showing an example of a short circuit detection circuit used in
5) to (I) are timing charts showing examples of the operation. 1 (Q1-Q8) electrode, 2 (PIA, P6A. PIB-P6B)... contact electrode, 3... impurity, 10... short circuit detection circuit, addition... control circuit. Ogami agent Yasugata Yu Mitsuhiro 3 Ward condolence 4!2 (A) PB-"=1 (F) N5-Low

Claims (1)

【特許請求の範囲】[Claims] 挿入されたICカードの複数個の電極と相互に接触する
ようにコンタクト電極を配設されたICカード用リーダ
・ライタにおいて、前記複数個の電極のうちの任意の2
組の間、における短絡を、前記各コンタクト電極を介し
て検出するための短絡検出回路を備えたことを特徴とす
るICカード用リーダ・ライタ。
In an IC card reader/writer in which a contact electrode is arranged so as to be in mutual contact with a plurality of electrodes of an inserted IC card, any two of the plurality of electrodes
A reader/writer for an IC card, comprising a short-circuit detection circuit for detecting a short-circuit between the pairs of contacts via each of the contact electrodes.
JP57056440A 1982-04-05 1982-04-05 Reader and writer for ic card Granted JPS58175058A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP57056440A JPS58175058A (en) 1982-04-05 1982-04-05 Reader and writer for ic card

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57056440A JPS58175058A (en) 1982-04-05 1982-04-05 Reader and writer for ic card

Publications (2)

Publication Number Publication Date
JPS58175058A true JPS58175058A (en) 1983-10-14
JPS648395B2 JPS648395B2 (en) 1989-02-14

Family

ID=13027138

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57056440A Granted JPS58175058A (en) 1982-04-05 1982-04-05 Reader and writer for ic card

Country Status (1)

Country Link
JP (1) JPS58175058A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62157984A (en) * 1985-12-31 1987-07-13 Diesel Kiki Co Ltd Reading and writing device for ic card
JPS62165286A (en) * 1986-01-17 1987-07-21 Toshiba Corp Reading/writing device for portable recording medium
JPS62224874A (en) * 1986-03-26 1987-10-02 Diesel Kiki Co Ltd Ic card read/write device
JPS6318485A (en) * 1986-07-10 1988-01-26 Omron Tateisi Electronics Co Ic card reader/writer

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52129250A (en) * 1976-04-22 1977-10-29 Fujitsu Ltd Function test method for logical circuit
JPS5635233A (en) * 1979-08-30 1981-04-07 Toshiba Corp Fault detecting system for bus line
JPS5720870A (en) * 1980-05-20 1982-02-03 Gao Ges Automation Org Method of contacting electric contact of id card attached with ic module

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52129250A (en) * 1976-04-22 1977-10-29 Fujitsu Ltd Function test method for logical circuit
JPS5635233A (en) * 1979-08-30 1981-04-07 Toshiba Corp Fault detecting system for bus line
JPS5720870A (en) * 1980-05-20 1982-02-03 Gao Ges Automation Org Method of contacting electric contact of id card attached with ic module

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62157984A (en) * 1985-12-31 1987-07-13 Diesel Kiki Co Ltd Reading and writing device for ic card
JPS62165286A (en) * 1986-01-17 1987-07-21 Toshiba Corp Reading/writing device for portable recording medium
JPS62224874A (en) * 1986-03-26 1987-10-02 Diesel Kiki Co Ltd Ic card read/write device
JPS6318485A (en) * 1986-07-10 1988-01-26 Omron Tateisi Electronics Co Ic card reader/writer

Also Published As

Publication number Publication date
JPS648395B2 (en) 1989-02-14

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