JP2543440B2 - IC card and IC card system - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an IC card and an IC card system for transmitting / receiving data to / from an external device using a radio wave as a medium.

[0002]

2. Description of the Related Art FIG. 6 is a block diagram showing the structure of a conventional IC card of this type. The IC card 20 includes a CPU 1 for executing a program, a ROM 2 for storing a program for driving the CPU 1 and fixed data, a RAM 3 for storing temporary data and variable data, and an external device. An input / output control circuit 4 for controlling input and output of data by means of an antenna, an antenna 5 for transmitting and receiving radio waves 6, a battery 7 for supplying power to each circuit, and a bus 8 for transmitting data and addresses.
And a modulation / demodulation circuit 9 that demodulates the signal received by the antenna 5 into a digital signal 11 and modulates the digital signal 11 from the input / output control circuit 4 to give to the antenna 5. CP
The U 1, the ROM 2, the RAM 3, and the input / output control circuit 4 are connected to the bus 8. The trigger signal 12 output from the modulation / demodulation circuit 9 to activate the CPU 1 is given to the CPU 1.

Next, the operation of this IC card will be described with reference to the flowchart of FIG. 7 showing the operation procedure and the usage explanatory diagram of FIG. 8 showing the usage state of the IC card. As shown in FIG. 8, when the IC card 20 is carried and approaches the terminal device 30 installed in a bank, for example, the IC card 20 receives the trigger radio wave TR transmitted from the terminal device 30. The trigger radio wave TR is converted into an electric signal by the antenna 5 and input to the modulation / demodulation circuit 9 (S1). The electric signal input to the modulation / demodulation circuit 9 is demodulated, and the demodulated trigger signal 12 is given to the CPU 1, whereby the CP
U 1 starts up (S2). The CPU 1 reads and executes the operation program stored in the ROM 2 (S3). The input / output control circuit 4 is controlled according to the executed program, the modulation / demodulation circuit 9 modulates the data to be transmitted, the received signal is demodulated, and the radio wave is transmitted between the IC card 20 and the terminal device 30. Data is sent and received as a medium (S4). Then, it is determined whether or not the program is being executed, and the operation of transmitting and receiving data is continued until the execution of the program is completed (S5). When the program execution is completed, the data transmission / reception operation is stopped (S6),
The IC card 20 is in the standby state to receive the trigger radio wave (S
7). Also, apart from this IC card, do not change the internal wiring.
, The individual code patterns to be sent can be changed
An information medium is disclosed in JP-A-62-74189. Change
To store multiple programs for financial transaction processing procedures.
An IC card system equipped with storage means including a memory area
It is disclosed in JP-A-60-229169.

[0004]

Since the conventional IC card has a single ROM that stores a program corresponding to a single type of terminal, it stores data with terminals of different types. Cannot send and receive. Therefore, in order to transmit / receive data to / from various terminals of different types, an IC card corresponding to each terminal is required. Therefore, the user of the IC card has to carry a plurality of IC cards, which inconveniences the user of the IC card, and the cost of purchasing the IC card increases. . Further, it is shown in Japanese Patent Laid-Open No. 62-74189.
Information medium and the one disclosed in JP-A-60-229169.
All of the IC card systems used are communication protocols.
If they are not the same, the program cannot be switched and the information
The target range of the terminal device to which the medium and IC card can be applied is limited.
There is a problem of being limited. In view of such a problem, it is an object of the present invention to provide an IC card and an IC card system capable of transmitting / receiving data to / from a plurality of types of external devices.

[0005]

An IC card according to a first aspect of the present invention is provided with a plurality of types of external devices, each of which is provided with a plurality of program storage units for storing a corresponding program, and an external device for starting a CPU that executes the programs. The frequency or regularity of the trigger signal given from the device is determined, and the program corresponding to the external device is selected according to the determined result.

The IC card system according to the second aspect of the present invention includes means for transmitting a trigger signal having a different frequency or regularity to each of a plurality of types of devices, and the IC card determines the frequency or regularity of the received trigger signal. It is configured to include means for transmitting / receiving data to / from a corresponding device.

[0007]

In the first invention, when the IC card receives the trigger signal from the external device , the frequency or regularity of the trigger signal is determined. A program corresponding to the external device is selected from the program storage unit in accordance with the result of determination of the frequency or regularity of the trigger signal , and the selected program is executed to transmit / receive data to / from the external device. This makes it possible to send and receive data to and from multiple types of external devices.

According to a second aspect of the invention, a plurality of types of equipment transmit trigger signals having different frequencies or regularities .
Upon receiving the trigger signal from the device, the IC card transmits / receives data to / from the device corresponding to the frequency or regularity of the trigger signal. Therefore, using one IC card,
You can send and receive data to and from multiple types of devices.

[0009]

The present invention will be described in detail below with reference to the drawings showing the embodiments thereof. FIG. 1 is a block diagram showing the configuration of an IC card according to the present invention. IC card 20 is a CPU that executes programs
1 and ROM 14,15,16 for storing programs and fixed data for driving CPU 1, RAM 3 for storing temporary data and variable data, and data between external devices (terminals) An input / output control circuit 4 for controlling to input and output
An antenna 5 for transmitting and receiving radio waves 6, a battery 7 for supplying power to each circuit, and a bus 8 for transmitting data and addresses
And a selection switch 13 for selecting the ROM 14, 15, 16 and a signal demodulated by the antenna 5 into a digital signal 11, and a modulator / demodulator which modulates the digital signal 11 from the input / output control circuit 4 and gives it to the antenna 5. It has a built-in circuit 9.

The CPU 1, ROMs 14, 15, 16 and RAM 3, the input / output control circuit 4 are connected to the bus 8. ROMs 14, 15, and 16 store programs corresponding to different types of external devices. For example, in the ROM 14, the external device A described later,
The ROM 15 stores a program for transmitting / receiving data to / from the external device B and the ROM 16 stores a program for transmitting / receiving data. The trigger signal 12 output by the modulation / demodulation circuit 9 to activate the CPU 1 is given to the CPU 1 and the selection switch 13. The selection switch 13 discriminates the frequency of the applied trigger signal 12, and a plurality of ROMs 14, 15,
It is designed to select any one of 16. Trigger signal
The frequencies of 12 correspond to the frequency of the trigger radio wave that receives the trigger radio wave from the external device.

Next, the operation of the IC card thus constructed will be described with reference to the flowchart of FIG. 2 showing the operation procedure and the explanatory views of FIGS. 3, 4 and 5 showing the usage state of the IC card. Carry the IC card 20 as shown in FIG.
For example, an external device (terminal) installed in the first bank
When approaching A, the IC card 20 receives the trigger radio wave TR _A of the frequency F _A transmitted by the external device A. Trigger radio wave
TR _A is converted into an electric signal 10 by the antenna 5 and input to the modulation / demodulation circuit 9. Electrical signal input to modulation / demodulation circuit 9
10 is demodulated and becomes a trigger signal 12 of frequency F _A and CPU 1
And to the selection switch 13 (S2), whereby the CPU
1 starts up (S3).

Subsequently, the CPU 1 determines whether or not the frequency of the trigger signal 12 is F _A (S4). When it is determined that the frequency is F _A , the selection switch 13 stores the program corresponding to the external device A. Select ROM 14 that is running (S5). Then CPU 1 reads the program stored in ROM 14
(S6) Execute. Then, the input / output control circuit 4 is controlled so that the data to be transmitted is modulated by the modulation / demodulation circuit 9 and given to the antenna 5, and the data is transmitted to the external device A using the radio wave 6 as a medium. Further, the data transmitted by the external device A using the radio wave as a medium is received by the antenna 5, the signal converted into the electric signal is demodulated by the modulation / demodulation circuit 9, and the data from the external device A is received.

That is, data is transmitted / received to / from the external device A (S7). Then, the CPU 1 determines whether or not the execution of the program is completed (S8). The operation of transmitting / receiving data is continued until it is determined that the program execution is completed, and the data transmission / reception operation is stopped when it is determined to be completed (S
9). Then, the IC card 20 goes into a standby state for receiving the trigger electric wave (S10). In this way, the terminal A of the first bank and the IC
Data is transmitted to and received from the card 20.

Next, as shown in FIG. 4, when the IC card 20 is carried and approaches the external device B of the second bank, the IC card causes the trigger radio wave TR of the frequency F _B transmitted by the terminal B to be transmitted. Receive _B (S1). This trigger radio wave TR _B is demodulated as described above to become the trigger signal 12 of the frequency F _B , which is given to the CPU 1 and the selection switch 13 (S2), and the CPU 1 is activated (S
3). Then, the CPU 1 determines whether or not the frequency of the trigger signal 12 is F _A. If it is determined that the frequency is not F _A , then it is determined whether or not the frequency is F _B (S11). If it is determined that the frequency is F _B , the selection switch 13 is controlled to select the ROM 15 storing the program corresponding to the external device B (S12). CPU 1 is ROM
The program stored in 15 is read (S13), data is transmitted and received as described above (S7), it is determined whether the program execution is completed (S8), and it is determined that the execution is completed. The data transmission / reception operation is continued until. After that, if it judges that the program has finished executing, it stops transmitting and receiving data (S9) and enters the standby state for receiving trigger radio waves (S10).
.

Next, as shown in FIG. 5, when the IC card 20 is carried and approaches an automatic ticket gate of a station, for example, a trigger radio wave of a frequency F _C transmitted by an external device C provided at the automatic ticket gate. Receive TR _C (S1). This trigger radio wave TR _C becomes the trigger signal 12 as described above and is given to the CPU 1 and the selection switch 13 (S2). This starts CPU 1 (S
3) The CPU 1 determines whether the frequency of the trigger signal 12 is F _A (S4). If it is determined that the frequency is not F _A , then it is determined whether the frequency is F _B (S11).
. When it is determined that the frequency is not F _B, it is determined whether or not the frequency F _C is different from those (S14). When the frequency is determined to be F _C , the selection switch 13 selects the ROM 16 storing the program corresponding to the terminal C provided at the automatic ticket gate (S15). And CPU 1 is ROM
The program stored in 16 is read (S16), and as described above, data is transmitted and received (S7), it is determined whether the program execution is completed (S8), and the program execution is completed. The data transmission / reception operation is continued until it is determined that.
When it judges that the program has finished executing, it stops sending and receiving data (S9) and enters the standby state for receiving trigger radio waves (S1).
0).

In this way, a predetermined ROM is selected according to the frequency of the trigger signal obtained by receiving the trigger radio waves of the three types of external devices, and the program stored in the selected ROM is executed, Data can be transmitted / received to / from the external device that has received the trigger radio wave from the external device. Therefore, one IC card can send and receive data to and from multiple types of external devices. Therefore, the inconvenience of the IC card user for carrying the IC card for each external device is eliminated. In addition, since the number of IC cards does not increase, the purchase cost of the IC card user can be reduced.

In the present embodiment, the selection switch 13 is controlled according to the frequency of the trigger signal to select one of the ROMs 14, 15 and 16 programs. The program may be selected by controlling the selection switch according to the regularity. Also,
I stored the programs separately in multiple ROMs, but
It may be stored separately in a plurality of storage areas of the ROM. Further, in the present embodiment, data is transmitted / received by using radio waves as a medium, but similar effects can be obtained by using light as a medium.

[0018]

As described in detail above, when the IC card of the first invention receives a trigger signal from an external device, it responds to the external device according to the result of judging the frequency or regularity of the received trigger signal. You can select the program you want to send and receive data to and from external devices according to the selected program, and send and receive data to and from multiple types of external devices in a wide range with a single IC card regardless of the communication protocol. We can provide IC cards that can Further, in the IC card system of the second invention, each of the plurality of types of devices has its own frequency
Or , when the IC card receives a trigger signal by transmitting a trigger signal with different regularity, the frequency or frequency of the received trigger signal
Can send and receive data to and from devices that support regularity, and with a single IC card independent of communication protocol
Can send and receive data to multiple types of devices in a wide range
An IC card system can be provided. Therefore, in both the first invention and the second invention, the user of the IC card is
Freed from the inconvenience of carrying multiple IC cards. In addition, the number of IC cards purchased by the user of the IC card is reduced, and the cost burden on the user of the IC card is reduced.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of an IC card according to the present invention.

FIG. 2 is a flowchart showing an operation procedure of the IC card of the present invention.

FIG. 3 is an explanatory diagram showing a usage state of the IC card of the present invention.

FIG. 4 is an explanatory diagram showing another usage state of the IC card of the present invention.

FIG. 5 is an explanatory diagram showing still another usage state of the IC card of the present invention.

FIG. 6 is a block diagram showing a configuration of a conventional IC card.

FIG. 7 is a flowchart showing an operation procedure of a conventional IC card.

FIG. 8 is an explanatory diagram showing a usage state of a conventional IC card.

[Explanation of symbols]

 1 CPU 3 RAM 5 Antenna 8 Bus 13 Selection switch 14,15,16 ROM 20 IC card

Claims (2)

(57) [Claims] 1. An IC card that transmits and receives data to and from an external device based on the operation of a CPU that executes the program, and a plurality of program storage units that store the programs corresponding to a plurality of types of the external devices, and The frequency or regulation of the trigger signal given by the external device to start the CPU.
An IC card, characterized in that it is provided with means for discriminating regularity and selecting a program corresponding to an external device according to the discrimination result. 2. An IC card system for transmitting / receiving data between an IC card and a plurality of types of devices, wherein a trigger signal having a different frequency or regularity is transmitted to each of the plurality of types of devices. The IC card system is characterized in that the IC card is provided with means for transmitting / receiving data to / from a device according to the frequency or regularity of the received trigger signal.