JPS62102382A - Ic card system - Google Patents

Abstract

PURPOSE:To reduce the amount of information at a terminal by deciding whether data is specified or not from the on-off state of the power source of an IC card when the IC card is mounted on the terminal, and then performing specific processing operation corresponding to the specified data. CONSTITUTION:The IC card 1 has an MPU 11, a data memory 29, a display driver 35, an oscillation circuit 44, and a liquid crystal display part 1e and is capable of storing the data memory 29 with data specified previously by itself and also displaying its storage contents on the liquid crystal display part 1e. When the IC card 1 is mounted on the terminal 2, it is decided whether data is specified or not from the on-off state of the power source of the IC card 1 and then specific processing operation corresponding to the specified data is performed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an IC card system using a so-called intelligent type IC card in which applications and the like can be set in a ψ body.

[Prior art and its problems 1] In recent years, it has become known as the cashless era, and by using cards issued by credit card companies, it has become possible to purchase products without handling cash. .

Incidentally, conventionally used cards include plus deck cards, embossed cards, and magnetic stripe cards, but these cards are easy to forge due to their structure, so unauthorized use has become a problem.

Therefore, in order to solve this problem, information cards, so-called IC cards, have been developed that incorporate a tC circuit that stores a PIN number etc. inside the card so that the PIN number cannot be read easily from the outside. An IC card system that combines such an IC card and a terminal has been developed.

However, the IC cards conventionally used in such IC card systems do not have their own power supply, and cannot be operated by themselves. For this reason,
We try to have the terminal side have all the applications that can be specified with the IC card, but as a practical matter, having the terminal side prepare all the applications that can be considered on the IC card side would be an extremely large amount of information. It is impossible. For this reason, in conventional systems, the versatility of IC cards and terminals has been significantly impaired, making them difficult to use.

[Purpose of the Invention] This invention was made in view of the above circumstances, and aims to reduce the burden of information on the terminal and improve the versatility of these by providing functions such as application specification to the IC card itself. The purpose of the present invention is to provide an IC card system that enables the following.

[Summary of the Invention] The IC card system according to the present invention has a power supply, and is capable of storing data specified in advance by itself using the power supply, and can display the stored contents on a display unit. This type of IC card is used to
After the c-card is attached to the terminal, the presence or absence of the data designation is determined based on the power on/off state of the card, and then a predetermined processing operation corresponding to the designated data is executed.

[Embodiments of the invention] An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a block diagram of the entire IC card system. In the figure, 1 is an IC card, and 2 is a terminal to which such an IC card 1 is installed.

Here, first, the IC card 1 is specifically configured as follows. That is, FIGS. 2(a) and 2(b) show external views of such an IC card 1.

In the figure, 1a is a card body, and this body 1a houses an IC circuit and its Nm.

Further, as shown in FIG. 1(a), this card body 1a is provided with a power on/off key 1b, an application designation key 1C, an execution key 1d on the front side, and has a liquid crystal display section 1e. . Here, the power on/off key 1b is configured such that the power is turned on when pressed for the first time, and the power is turned off when the key is pressed for the next time. Each time the application designation key Ic is pressed, applications such as home shopping, home banking, home reservation, etc. are selected in order, and these are displayed on the display section 1e.

The execution key 1d enables execution of the application being displayed. In addition, the card body 1a is shown in the same figure (
As shown in b), a connector 1f for external connection is provided on the back side. In this case, the connector 1f has a total of 8 bins (4×2).

On the other hand, returning to FIG. 1, the IC card 1 has an MPU (microprocessor) 11. , this MPU 11 is represented by a functional block circuit as shown in FIG.
, card status buffer 20, key human control unit 21
, input buffer? Input controller 1 to roller 23 via 22,
Output controllers 25 are connected through output buffers 24, respectively. Further, a data input/output terminal I10 is connected to the input controller 23 and the output controller 25.

Here, the data ROM 13 stores all operating conditions for the IC card itself (for example, data writing, applied voltage, current permissible value and maximum applied voltage, maximum data transmission amount, maximum response time, etc.), and these condition data are stored in the data ROM 13. When the internal initialization of the card itself is completed, it is transmitted as answer-to-reset data to the terminal side, which will be described later, according to a predetermined format.

The system program ROM 15 includes various system programs as well as a code signal rACKJ or rNAcJ indicating whether the signal transmitted and supplied from the terminal 2 side is correct or not.

The working RAM 16 is designed to store application data specified for each card.

The system controller 17 outputs operation commands to each circuit according to the data reception signal transmitted and supplied via the input buffer 722 and the operation state.

The decryption calculation unit 18 performs decryption based on the rR8AJ algorithm, and uses the decryption key code (ISSu) stored in the key code memory 26.
re'S Pr1vateKey), the input data supplied from the terminal side via the input buffer 722 is decoded and output to the comparator 27. The comparison output of this comparison section 27 is the system controller 1
7 system control line 17a. A flag 28 is connected to this control line 17a, which is activated based on the comparison result of the comparison section 27.

The read/write controller 19 controls writing/reading of data to/from the data memory 29 in response to commands from the system controller 17, and the memory data read by the read/write controller 19 is sent to the comparator 27, It is output to the bus 12 or the card status buffer 20.

The key manual control unit 21 is the power on/off key 1a on the front surface of the card body 1 shown in FIG. 1(a).

It is for detecting keystrokes from the application designation key 1b and the execution key 1C.

A timer 30 is connected to the system controller 17. In normal information exchange processing, this timer 30
When a data write voltage supply start command is issued to the terminal, a certain period of time is counted, and if the acknowledgment signal rAcKJ is not supplied from the terminal side while the timer 30 is counting, the system controller 17 The exchange of data is now prohibited.

An address comparator 31 is connected to a pass line connecting the read/write controller 19 and the system bus 12. This comparator 31 compares an unused specific number set in a fixed address 32 with a specified address specified via the system bus 12, for example, at the end of a test for card manufacturing errors. The comparison output is supplied to the read/write controller 19, and only if the comparison output is an address match signal due to unauthorized use of the terminal, all data in the data memory 29 is cleared and secret information is read from the card. We are trying to prevent this.

The address line 33 is connected to the MPU II configured in this way.
, a data memory 29 is connected via a data line 34. The data memory 29 here is, for example, EEP-RO.
M is used, and the memory areas include rCAJ, rl
PINJ, rPANJ, rcHNJ, fE
In addition to information such as the PDJ, rPRKJ, and rRTNj codes and status data rsTJ, the application code corresponding to the application is stored.

Here, rcAJ (Card Authentication)
cator) is a random code used to encrypt and decrypt messages.

“1PINJ (initialization P
personal identificationNu
mber) is a random code, for example, 6 bits, and is a number until the self-verification number PIN is used. rP
ANJ (Primary Account Num
ber) represents the account number. rcHNJ, (C
ard holder'S Name) represents the name of the card holder. rEPDJ (Exp
i rat i onDate) represents the expiration date. rPRKJ (private Key Co.
de) is a decryption code. rRTNJ is the number of times data is re-input when incorrect data is input.

rsTJ is used to represent the guard state of the station, and is sent to the terminal side in data format.

Further, the application code includes codes corresponding to home shopping, home banking, home reservation, etc., for example. Further, this data memory 29 has a booster circuit 291 inside. This booster circuit 291 is used when writing data to and reading data from the data memory 29.

Further, a display driver 35 is connected to the data line 34. This display driver 35 is supplied with side signals from the MPU 11. The liquid crystal display section 1e described in FIG. 2 is connected to this display driver 35. This display section 1e is supplied with an LCD common signal and a display data signal from a display driver 35.

On the other hand, as connector 1f for external connection, I10 terminal, R
It has an e5et terminal, a Vcc terminal, and a Gnd terminal.

Then, the I10 terminal is connected to the I10 terminal of MPU11.
The 5et terminals are respectively connected to the INT terminal of the MPU 11, that is, the interrupt terminal. Further, the Vcc terminal is connected to a power supply line P via a diode 36 having the polarity shown in the figure, and the Vdd terminal of the MPU 11 and the data memory 2 are connected to this line P.
The Vee terminals of the No. 9 booster circuits 291 are connected to each other. Further, the VSS terminal of the MPLJII and the VQQ terminal of the booster circuit of the data memory 291 are connected to the Gnd terminal, respectively.

Between the line P and the Gnd terminal, there is a battery 37 exclusively for the card.
A series circuit of a switching element 38 and a diode 39 having the illustrated polarity is connected. Here, the battery 37 is, for example, a paper battery. Further, a P-channel MOS transistor is used as the switching element 38, and the one-shot circuit 401 is activated by the binary counter 4 in response to the pressing operation of the power on/off key 1b described in FIG.
Inputs of 1.0 are given sequentially through 1. Here, the switching element 38 is a counter 41
When the content of is O, it is turned on.

In addition, the switching element 38 is activated by input to the VCC terminal or by operation of the power on/off key 1b.
The output given via the one-shot circuit 43 is given to the Re5et terminal of the MPU 11.
It is designed to initialize the inside.

The application designation key 1C1 execution key 1d described in FIG. 2 is connected to the power supply line P.

These key ICs, 1d, are connected to the key manual control section 21 of the MPL III. In addition, 44 is an oscillation circuit, and the MPU
It is designed to output a lock signal as required for the operation of 11.

Next, FIG. 4 shows an external view of a card terminal 2 into which such an IC card 1 is installed. This terminal 2 has a card insertion slot 2a, a keyboard 2b, and a display section 2c. The keyboard 2b is provided with a numeric keypad 2d, a yes key 2e, a no key 2f, and the like.

The terminal 2 is specifically constructed as shown in FIG. In the figure, system bus 5
1 includes a sound controller 52, a working RAM
53, system program ROM 54, terminal attribute ROM 55, initial parameter RAM 56, main controller 57, display drive controller 58, key controller 59, read/write controller 60,
A comparison unit 61, an encryption calculation unit 62 for performing encryption based on the R8A algorithm, a latch circuit 63 for latching the OA code, and a DES encryption calculation unit 64 based on the data encryption standard.
, similarly, an ES type decoding arithmetic unit 65, an input/output controller 66, an output buffer 768 via an output controller 67, and an input controller 70 via an input buffer 769 are connected, respectively.

A speaker 71 is connected to the sound controller 52 and outputs an alarm sound as necessary.

The working RAM 53 stores rPANJ, rcHNJ, rEPDJ sent from the IC card 1 side in the memory area.
, etc. are stored, as well as various processing data within the terminal.

The system program ROM 54 contains various system programs as well as an EN for matching with the IC card 1.
It has a Q code.

The terminal attribute ROM 55 stores terminal codes TC (for example, manufacturing code, issue code, store code, etc.) depending on the purpose of the terminal.

The initial parameter RAM 56 stores answer-to-reset data from the IC card 1 all at once. An output controller 67, an input controller 70, a vpp level latch section 72, a Vpp timer latch section 73, and an IDp level latch section 74 are connected to this initial parameter RAM 56 via a transmission line 56a.
A corresponding Vpp1 source 75, vpp timer 76, and Ipp limiter 77 are connected to these latches 72, 73, and 74. Here, the maximum data write voltage by the vpp power supply 75, the write voltage supply time by the vpp timer 76, the maximum allowable data sleep current by the limiter 77, etc. are the answer-to-reset data stored in the initial parameter RAM 56. Set based on.

An IC card operating frequency selector 78 is connected to the data transmission line 56a. A signal generated from an oscillator 79 is supplied to this selector 78 via a frequency divider 80.
It is output from the Cl0Ck terminal as a signal with the operating frequency set.

A timer 81 is connected to the initial parameter RAM 56. This timer 81 is the initial parameter RA
Based on the answer-to-reset data stored in M56, the maximum response time is counted from the time when the ENQ signal or the corresponding command signal is sent to the IC card 1 side, and this waiting time If there is no response signal from the card 1 side, the main controller 57 instructs the transmission of these signals again, or the reader/writer mechanism unit 82 receives the IC card 1 via the reader/writer controller row 560. I am trying to instruct the connection to be disconnected.

A comparator 61, an encryption arithmetic unit 62, a latch circuit 63, and an input/output controller 66' are connected to the system control line 57a of the main controller 57, and control commands are sent from the main controller 57 to each circuit according to the operating state of the system. is now being sent.

The display drive controller 58 controls the display of the display unit 2C of the terminal 2 and the backlight 2c1 such as the EL element on the back of the display unit 2C.
The light is turned on only when the IC card 1 is inserted into the card insertion slot 2a of the terminal 2.

The key controller 59 provides a key sampling signal to the keyboard 2b of the terminal 2 to detect a key input signal.

The reader/writer controller 60 drives and controls the reader/writer mechanism section 82. Here, the mechanism section 82 is equipped with a card transport motor, and transports the IC card inserted from the card insertion slot 2a of the terminal 2 to a predetermined position, and electrically connects the card 1 to the terminal 2. When the predetermined process is completed, the IC card 1 is returned to the card insertion slot 2a.

The reader/writer mechanism section 82 includes an output buffer 69, a reset controller 83, an Ipp level latch section 74, an operating frequency selector 78, and a Vccl'1R84.
is IIisat'L. In this case, I1 corresponds to these
0 terminal, Re5et terminal, vpp terminal, (:, loc
The k terminal and VCC terminal are connected.

The input controller 70 and the output controller 67 control data exchange with the IC card 1 in accordance with commands from the main controller 57 via the initial parameter RAM 56. Among these, the input controller 70 outputs the data sent from the IC card 1 to the working RAM 53 etc. via the input buffer 769 and also provides it to the comparison section 61, and provides the comparison output here to the main controller 57. Further, the output controller 67 sends data provided from the terminal attribute ROM 55 and encrypted data provided from the encryption calculation unit 62 to the IC card 1 side via the output buffer 68, respectively. Here, the encryption calculation unit 62 converts rPANJ sent from the working RAM 53 via the system bus 51 into an IPK (Issuer-s Pub
ltc Ke! r/> Encryption is performed according to a public key code given from the ROM 85. The IPKROM 85 is preloaded with a public key code for the decryption code rPRKJ stored in the data memory of the IC card 1, and outputs the stored code when a command is given from the main controller 57.

The latch circuit 63 inputs the latched rcAJ to the encryption arithmetic unit 64 and the decryption arithmetic unit 65. The encryption arithmetic unit 64 receives predetermined data via the system bus 51 and performs cryptographic processing on rPANJ and the like stored in the working RAM 53 according to instructions from the main controller 57 using rcAJ as a key. I am trying to output it to . Further, the decryption arithmetic unit 65 decrypts the encrypted data input to the input/output controller 66 based on rcAJ, and outputs the decrypted data to the system bus 51.

The input/output controller 66 sends and receives encrypted data when a database, ie, a host computer, is connected online.

Next, the operation of the actual droplet example configured in this way is shown in Fig. 6(a).
This will be explained according to the flowchart in (b).

First, the single card is 1! The following describes the case where the power source is turned on and an application is specified. In this case, Fig. 6 (
In step A1 shown in a), the power of the IC card 1 alone is turned on. In this case, the N81 on/off key 1b in FIG. 2 is pressed and operated. Then, as shown in FIG. 3, the one-shot circuit 40 generates an output due to the ON operation of the key 1b, which is output to the binary counter 41.
given to. This counter 41 changes the count content from "1" → rOJ → "1" every time there is an input.
If it is now "1", the output of the one-shot circuit 40 changes it to "0". As a result, the switching element 38 is turned on, the battery 37 is connected between the power supply line P and the Gnd terminal, and power is applied to the booster circuit 291 of the MPU 11 and the data memory 29, respectively. In this state, proceed to step A2. In this step A2, power is applied to the one-shot circuit 43 by the battery 37, an output is generated from the circuit 43, and this output is the Re5et of MPLll.
given to the terminal. As a result, the inside of the MPU 11 is initialized. At the same time, C1 of the oscillation circuit 44
ock is input to MPtJll.

Next, the process advances to steps A3 and A4. This step A3,
At A4, an application is designated using the application designation key 1C shown in FIG. Specifically, the first
In the figure, when the application designation key 1C is pressed, input is given to MPIJll from the power supply line P. Then, in FIG. 3, key human power is applied to the system controller 17 via the key human power control section 21,
The first application data is read from the two data memories. This data is displayed on the liquid crystal display section 1e via the display driver 35.

In this case, if the content displayed on the display section 1e is not what is desired, the application designation key 1C is pressed again. Then, key power is given to the system controller 17 through the same route as described above, and this time the data memory 29
The next application data is then read out and displayed on the display section 1e. Hereinafter, in the same manner, step A3
, A4 are repeated.

In this state, if the content of the application displayed on the display section 1e is desired, the user presses the execution key 1d. Then, the process proceeds to steps A5 and A6, and in FIG.
The signal is given to the system controller 17 via the . As a result, at this point, the application data displayed on the display section 1e is stored in the working RAM 16.

In this case - for example home shopping r00000
001J, Home Viking ro0000010J
, home reservation rooooooo11 J.

With this, application designation using the IC card 1 alone is completed.

Next, the process advances to step A7. In step A7, the card for which application designation has been completed is inserted into the terminal 2 with the power turned on.

In this case, as shown in FIG.
C card 1 will now be inserted. Then, after waiting for card 1 to be inserted, the 110 terminal and Re5e terminal are connected as shown in Figure 1.
The t terminal, VCC terminal, and Gnd terminal are connected to the I10 terminal, Re5et terminal, Vcc terminal, and Gnd terminal of terminal 2, respectively. In this case, the Cl0Ck terminal of terminal 2 may be connected instead of the oscillation circuit 44.

In this manner, when the IC card 1 is inserted into the terminal 2, a preset initial setting signal is transmitted from the terminal 2 to the IC card 1.

This initial setting signal is, for example, the main controller 57
Under the control, the I10 terminal is set to H level, the Re5et terminal is set from L level to H level, and the VCC terminal is set to a predetermined voltage, for example, 5V.

In this case, the C1ock terminal also has a predetermined frequency, for example 4.91.
It is set to 52MHz.

This initial setting signal is received in the IC card 11Ql via the corresponding I10 terminal, Re5et terminal, and Vcc terminal. Here, as mentioned above, C1 of terminal 2
When the ock terminal is connected instead of the oscillation circuit 44,
The output of the C1ock terminal is also received. Then, the IC card 1 is restarted under the operating conditions based on the initial setting signal at this time.

That is, first proceed to step 88, and enter the R of IC card 1.
The signal input to the e5et terminal is the INT of MPU 11.
given to the terminal. Then, the process advances to step A9, and interrupt processing is executed. In the interrupt processing at step A9, everything in the MPU II is cleared except for the application code specified by the IC card 1 and written to the working RAM 16. Also, in this state, this time V
Power is applied to MPLlll and the booster circuit 291 of the data memory 29 from the cc terminal. Next, in step A10, under the control of the system controller 17, the answer key stored in advance in the data ROM 13 is
Two reset data is read and the system bus 12
, output buffer 24, and output controller 25.
It is sent from terminal 10 to terminal 2.

In this case, the answer-to-reset data stored in the data ROM 13 is structured as shown in FIG. In the figure, each operating condition data of the IC card 1 is shown in interface bytes TA1, TBl, TCl and TA2, TB2, Te3, . . . , and the presence or absence of each condition data is determined by the format byte TO. It is shown in On the other hand, TDl indicates whether or not the condition data after TA2 is present, and the initial byte TS is initial setting data for transmitting these condition data.

Furthermore, historical bytes TI, T2, . . . TK are used when increasing the condition data in this card 1. The above-mentioned initial byte TS, format byte TO, and interface byte are configured in an 8-bit data format. On the other hand, the code content of the format byte To in FIG.
As shown in the figure. a, b, c, d are bits that indicate the number of bytes in the historical bytes TI, T2, ..., TK, e is a bit that indicates whether or not there is condition setting data in the interface byte TA1, and f is the bit that also indicates the interface. bit indicates the presence or absence of TB1, Q G, t indicates the presence or absence of C1, h indicates the presence or absence of TD1, that is, whether there is some condition setting data after the interface byte TA2. This is a bit that indicates. In this case, in order to send power on/off information for the IC card 1 alone, the lower 4 bits a%b and C1d of To are set to other than "0.0.0.0" and the historical byte TI is ,T2,...,T
Indicates that condition data exists in K, and in this state,
Among T1, T2, . . . , TK, T1 is provided with information corresponding to power on/off of the IC card 1 alone. Here, when the power is on, it is 1 (0000000
1) When the power is off, it is set to 0 (00000000).

The answer-to-reset data configured in this way is sent to terminal 2 in step B3 of FIG. 6(1)).
received at the end. In this case, data input to the I10 terminal of terminal 2 is provided to input buffer 69 via input controller 70. And step B4
Under the control of the main controller 57, the format character of To from the main controller 57 and the TO in the answer-to-reset data of the input buffer 2.2 are compared in the comparator 61, and the lower 4 bits are all O.
It is determined whether or not. If the value is other than O, the data in the input buffer 769 is sent to the working RAM 53, and in step B5, the comparator 61 determines whether T1 of the historical byte is O or not. In this case, as mentioned above, the IC card 1 is NI! is on, the content of T1 is 1.

Therefore, the data in the input buffer 69 is written to the initial parameter RAM 56, and the process proceeds to step B6 onwards, after which the application code in the working RAM 16 is sent to the terminal side, and the processing according to this is executed within the terminal 2. Become. In other words, in this case, answer-to-reset data is sent from the IC card 1 to the terminal 2 side, and if this data is determined to be correct, the ENQ code is retrieved from the system program ROM 54 under the control of the main controller 57. This is sent to IC card 1, and working RA
Written to M16. In this state, the system controller 17 determines whether or not the ENQ code can be received in normal operation, and from the system program ROM 15, if YES, ACK is obtained; if No, each NAC code is extracted, and the output buffer is 124, and is transmitted to the terminal 2 side via the output controller 25. This determination result is written into the working RAM 53 via the input controller 70 and the input buffer 62. And I.C.
When it is confirmed that the card 1 is operating normally, the TC code is taken out from the terminal attribute ROM 55 and latched into the output buffer 68 via the output controller 67.

On the other hand, if the IC card 1 cannot operate normally, a control command is given from the main controller 57 to the reader/writer controller 60 to control the IC card in the reader/writer mechanism section 82.
The connection with card 1 is canceled. Output buffer 768
The TC code latched is sent to the IC card 1 side. Then, on the card 1 side, the application data stored in the working RAM 16 is taken out, once latched in the output buffer 24, and then sent back to the terminal 2 side. On the terminal 2 side, this application code is input to the working RAM 53 via the input controller 68 and input buffer 62 and stored there. After the main controller 57 determines the usage type, etc., the system program R
An instruction code is extracted from the OM 54 and sent back to the IC card 1 side. In this way, when the instruction code is retrieved, hold it and use the keyboard 2b of terminal 2.
A comparison is made between the personal identification number entered by the key and the self-verification number PIN stored in advance in the IC card 1, and after waiting for the two to match, an information exchange operation such as a monetary formula is executed. Become so.

Next, with IC card 1 powered off, terminal 2
We will describe the case where it is installed on the In this case, when the IC card is inserted into terminal 2, IC card 1 is inserted from terminal 2.
A preset initialization signal is given to the input signal. This initial setting signal is controlled by the main controller 57 such that the I10 terminal is at H level, the Re5et terminal is at H level,
The Vcc voltage is set to a predetermined voltage, here 5V. This results in the state of step B1 in FIG. 6(1)). In step B1, the voltage at the VCC terminal is supplied to the IC card 1. Then, the one-shot circuit 43 is energized and its output is given to the Re5et terminal of the MPU 11. As a result, the inside of MPU II is initialized. Moreover, at the same time, Cl0Ck of the oscillation circuit 44 is applied to the MPU 11. In this state, the process advances to step B2, and under the control of the system controller 17, the data RO
Answer-to-reset data previously stored in M13 is read out and transmitted from the I10 terminal to the terminal 2 side via the system bus 12, output buffer 24, and output controller 25.

The answer-to-reset data configured in this way is received at the terminal 2 side in step B3. In this case, data input to terminal 110 of terminal 2 is passed through input controller 70 to input buffer 6.
given to 9.

Then, in step B4, the main controller 57
Under the control of the controller 57, the TO format character from the controller 57 and the To in the answer-to-reset data of the input buffer 22 are compared in the comparator 61, and it is determined whether the lower 4 bits are all O or not. If it is other than 0, the data in the input buffer 769 is sent to the working RAM 53, and in step B5, the comparator 61 determines whether T1 of the historical byte is 0 or not. In this case, the content of T1 is O because the power of the IC card 1 is turned off as described above. In this case, the process advances to step B7. This step B
7, if IC card 1 is powered off and no application is specified, terminal 2
On the side, since it is completely impossible to determine the type and information about card 1, the main controller 57! llt
For example, ``Please select an application'' is displayed on the display unit 2C via the display drive controller 58 by ill. Display a message like this. In addition, in parallel with this, the card 1 is ejected from the card insertion slot 2a of the terminal 2 shown in FIG. 4 in step 8B.

Although the power is turned on for IC card 1,
When Card 1 is inserted into Terminal 2 without an application specified, the application displayed on the display section 1C of Card 1 at this point is assumed to have been specified and is processed. ing.

Therefore, according to such a configuration, an intelligent type IC card is used, which has its own power supply and can independently specify an application at the input section using this power supply. When installed in terminal 2, it is determined whether an application is specified based on the power on/off state of card 1, and based on this judgment result, the processing operation corresponding to the application specification at this time is executed. Conventional IC
Compared to the case where all conceivable applications on the card side were prepared on the terminal side, the burden of information on the terminal 2 can be significantly reduced. Further, by being able to reduce the burden of information m on the terminal 2 in this way, it is possible to significantly improve versatility. Moreover, when the power is off and no application is specified, I
Since it is determined that there is insufficient information for normal operation of the C card and an appropriate message can be displayed to that effect, there is an advantage that the card user can be prevented from performing unnecessary operations.

It should be noted that the present invention is not limited to the above-mentioned embodiments, but can be implemented with appropriate modifications without changing the gist.

[Effects of the Invention] According to the present invention, there is provided an intelligent type IC which has its own power source and can use this power source to store data designated by an input section and display the stored contents on a display section. By using a card and attaching such a card to a terminal, it is possible to determine whether or not the above data is specified based on the on/off state of the power of the card, and then to execute a predetermined operation corresponding to this specified data. Therefore, it is possible to reduce the burden of information on the terminal and improve its versatility.

[Brief explanation of drawings]

Fig. 1 is a block diagram showing the entire system of an embodiment of the present invention, Figs. 2(a) and 2(b) are external views showing an IC card used in the embodiment, and Fig. 3 is a diagram showing an IC card used in the same embodiment. 4 is an external view showing the terminal used in the same embodiment, FIG. 5 is a block diagram showing the structure of the terminal, and FIGS. 6(-a) and (b) are the same. Flowcharts for explaining the embodiment, FIGS. 7 and 8
The figure is a diagram for explaining answer-to-reset data used in the same embodiment. 1...IC card, 1a...card body, 1b...
・Power on/off key, 1C...application cage, 3.
1d...Execution key, 1e...Display section,
2...Terminal, 2a...Card insertion slot, 2b.
...keyboard, 2C...display section, 11...vpu
, i3...data ROM116...working)-
<ΔM, 17... System controller, 19...
Read/write controller, 29... data memory,
35...Display driver, 37...Battery, 38...
Switching element, 43... One-shot circuit, 44
...Oscillation circuit, 53...Working RAM, 57.
...Main controller.

Claims (2)

[Claims] (1) In an IC card system consisting of an IC card and a terminal to which this IC card is installed, a power supply,
An IC card having an input section, a storage section for storing data specified in advance by the input section, and a display section for displaying the stored contents of the storage section, and when the IC card is installed, the power of the card can be turned on or off. An IC card system characterized by comprising: a terminal having means for detecting an IC card. (2) The IC card according to claim 1, wherein the terminal detects the on/off state of the power of the IC card when the IC card is attached, and has a display section that displays the detection result. system.