JPH0916737A - Information storage card - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide an information storage card that has both high security and ease of use that allows communication over a distance. [Structure] It is configured to perform wireless communication with a predetermined interrogator via a transmission / reception antenna 18, and to communicate via electrostatic plates 24a to 26b when inserted into a reader / writer. In the composite type IC card 2,
The storage area in the memory 32, which is commonly used for communication with the interrogator and the reader / writer, is divided into a plurality of areas according to the importance (security level) of the data to be stored. When a process for communication is executed, the memory 32 readable / writable data storage area is limited to an area for storing low security data. Therefore, data having a high security level is not transmitted during wireless communication in which there is a possibility of data interception.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention comprises an IC (integrated circuit) including a memory and the like, exchanges data by wireless communication with one external device, and exchanges data with another external device. The present invention relates to a composite type information storage card (IC card) configured to exchange data by mechanical contact.

[0002]

2. Description of the Related Art Conventionally, as a system for carrying out door entrance / exit management, ski area gate management, etc., a wireless communication interface consisting of transmitting / receiving antennas and an identification code (ID)
A non-contact type IC card in which a memory storing data such as the above and an information processor including a CPU and the like are housed in one card has been put into practical use.

That is, in this system, when the person carrying the card enters the arrival range of the radio wave transmitted from a predetermined external device, the radio wave is received by the antenna of the card, and in the card, a CPU, etc. The so-called remote ID in which the information processing device reads the identification code from the memory and transmits the read identification code from the antenna when there is a data request from the external device.
The operation is performed. Then, the external device receives the identification code transmitted from the card side to identify the carrier of the card, and controls the opening / closing of the door or the gate according to the identification result.

Incidentally, this type of non-contact type IC card is classified into an electromagnetic induction system (electromagnetic coupling system), a microwave system, etc., depending on the configuration of the radio wave and radio communication interface used with an external device. . There are also a battery-incorporated one having a built-in battery for its own operation, and a batteryless one configured to detect a radio wave received from an external device by an antenna and use the detected voltage as its own operating voltage.

Further, such a non-contact type IC card has an advantage that it is easy to use since it can communicate remotely. Further, since it can be configured not only to transmit the identification code but also to exchange various data with an external device, it can be applied to, for example, a credit card or a bank card.

However, since a non-contact type IC card uses radio waves for communication with an external device, data may be intercepted during communication. Therefore, for example, data such as a credit card number that has high confidentiality and may be greatly damaged when it is known to a person, data about privacy such as personal medical history that should not be known to others, etc. It is practically difficult to handle data requiring high security (safety) with a contactless IC card.

On the other hand, a contact type IC card that exchanges data by mechanically contacting an external device is also put into practical use, instead of using wireless communication as in the non-contact type. This contact-type IC card has a contact-type communication interface that performs communication by mechanically contacting an interface section of an external device instead of the wireless communication interface. Other basic configurations are non-contact-type. It is similar to the IC card. Further, as the contact-type communication interface, there are one having a terminal and one having an electrostatic plate. However, the communication is different only in whether or not the interface is electrically contacted with the interface section on the external device side. Sometimes basically mechanical contact is required.

That is, in the case of the terminal type, communication is performed by making electrical contact with the terminal on the external device side, and in the case of the electrostatic plate type, it faces the electrostatic plate on the external device side. Since communication is performed by being placed,
In either case, the data does not leak to the outside like radio waves and data interception during communication is impossible. Incidentally, the contact type IC card is usually configured so that an operating voltage for its own operation is supplied from an external device via a communication interface.

Therefore, according to the contact type IC card, it is possible to handle data relating to a credit number which requires high security and data relating to personal privacy, but the card is a reader / writer as an external device. When it is applied to a door entrance / exit management system or the like, it makes the cardholder feel troublesome.

Therefore, for example, as disclosed in Japanese Patent Publication No. 4-16831, the function of a non-contact type IC card and the function of a contact type IC card are combined so as to compensate for the disadvantages of both types. A composite type IC card is also proposed. And, the composite type IC card of the above publication is
The non-contact type IC card function and the contact type IC card function share one memory, which simplifies the structure of the apparatus.

[0011]

SUMMARY OF THE INVENTION The above conventional composite type IC
According to the card, by storing various data in the memory, for example, a contactless function (wireless communication) is used when used for door entrance / exit management, a credit card, a bank card, etc. When it is used as, the contact type function (contact communication) is used, and so on.

However, in the above-mentioned conventional composite type IC card, at least the memory is shared for both functions. Therefore, for example, when the non-contact type function is used, various data requests can be made from the external device side. Among the data stored in the memory, even data that requires high security may be transmitted from the antenna.

Therefore, in the conventional composite type IC card described above, the usability can be improved, but the high security cannot be maintained. It should be noted that it is conceivable to separately provide a memory for the non-contact type function and a contact type function, but in this case, the number of parts in the IC card increases, and the labor and cost of manufacturing are increased. Will increase.

The present invention has been made in view of the above problems, and an object of the present invention is to provide an information storage card having both high security and ease of use that enables remote communication.

[0015]

In order to achieve the above object, the present invention according to claim 1 is for carrying out wireless communication with a first external device, as illustrated in FIG. A first communication interface for communicating with a second external device by mechanical contact, and response data to be output in response to a data request from each of the external devices. When a data request from the first external device is received by the memory for storing and the first communication interface, response data according to the data request is read from the memory, and the read response data is read by the first response device. When a data request from the second external device is received by the first response control means for transmitting to the first communication interface and the second communication interface, the first response control means responds to the data request. In an information storage card provided with a single response card for reading response data from the memory and transmitting the read response data to the second communication interface, the memory includes: A storage area for storing the response data is divided into a plurality of areas in advance, and further, when the first response control unit reads the response data from the memory, the first response control is performed. An information storage card is characterized in that the information storage card is provided with a read limiting means for limiting a storage area in the memory in which the means can read response data to a predetermined specific storage area.

The present invention according to claim 2 provides the information recording card according to claim 1, wherein the card is
From the first and second external devices, respectively, the first and second external devices
An operating voltage is supplied via the communication interface of the first response control means, the second response control means, and the read limiting means. Operates by receiving a logical sum voltage of a first operating voltage supplied via the second communication interface and a second operating voltage supplied from the second external device via the second communication interface. When the logical sum voltage becomes equal to or higher than a predetermined value at which the CPU can operate, the first operating voltage is higher than the second operating voltage. If it is larger, the CPU outputs the first command signal for causing the CPU to execute the processing as the first response control means and the read limiting means, and outputs the second operation voltage higher than the first operation voltage.
Is greater than the operating voltage of the second response control means, the second response control means executes the second response control means.
And a command signal output means for outputting the command signal of
The PU is an information storage card characterized in that the PU is configured to execute a process in accordance with the first command signal and the second command signal.

According to a third aspect of the present invention, in the information recording card according to the first aspect, the card includes the first and second communication interfaces from the first and second external devices, respectively. The operating voltage is supplied via the first response control means, the second response control means, and the read limiting means. A first operating voltage supplied via the second operating interface and a second operating voltage supplied from the second external device via the second communication interface. It is realized by executing the process of the CPU, and further, when the first operating voltage becomes equal to or higher than a predetermined set value, the first CPU causes the CPU to execute the process as the first response control unit and the read limiting unit. of Outputs decree signal, when the second operating voltage is equal to or higher than a predetermined value, a second for performing the processing as the second response control means to said CPU
And a command signal output means for outputting the command signal of
The PU is an information storage card characterized in that the PU is configured to execute a process in accordance with the first command signal and the second command signal.

According to a fourth aspect of the present invention, in the information storage card according to the third aspect, the command signal output means has both the first operating voltage and the second operating voltage. When it is equal to or more than a set value, it is configured to preferentially output one of the predetermined command signals of the first command signal and the second command signal, Is characterized by.

According to a fifth aspect of the present invention, in the information storage card according to the third aspect, the command signal output means has both the first operating voltage and the second operating voltage. When the value becomes equal to or higher than the set value, the one of the first command signal and the second command signal that corresponds to the operating voltage that has become equal to or higher than the set value is preferentially output. It is characterized by being.

The present invention according to claim 6 provides the information storage card according to any one of claims 1 to 5, wherein a magnetic stripe for recording information is provided on the surface of the information storage card. It is characterized by being.

[0021]

The information storage card according to claim 1 configured as described above performs wireless communication with the first external device via the first communication interface. Then, when the data request from the first external device is received by the first communication interface, the first response control means reads the response data corresponding to the received data request from the memory, and the read response. Send the data to the first communication interface. Then, the transmitted response data is received by the first external device.

On the other hand, the information storage card communicates with the external device by mechanically contacting the second communication interface with the second external device. And the second
When the data request from the second external device is received by the communication interface of the second response device, the second response control unit reads the response data corresponding to the received data request from the memory, and the read response data is transmitted to the second response device. Send to the communication interface of. Then, the transmitted response data is received by the second external device.

Here, in the memory, a storage area for storing response data to be output in response to a data request from each external device is provided in advance by being divided into a plurality of areas. When the control means reads the response data from the memory, the read limiting means limits the storage area in the memory where the first response control means can read the response data to only a predetermined specific storage area. To do.

That is, in the information storage card according to the first aspect, various responses in the memory are transmitted from the second external device which requires mechanical contact and does not worry about data interception (radio wave interception). Although the data can be read, only the response data stored in the specific storage area in the memory can be sent from the first external device that exchanges the data using wireless communication that may intercept the data. I am able to read it.

Therefore, according to the information storage card of the first aspect, data with low security is stored in a specific storage area in the memory, and data with high security is stored in other storage areas. By sharing the memory, the ease of use of the wireless communication (non-contact type) using the first communication interface and the high security of the contact communication (contact type) using the second communication interface are shared. It can be realized regardless of the simplified structure.

In the present invention, the data request from the external device is, of course, made by the communication data during the communication with each external device. For example, the radio wave transmitted from the first external device is used. Is first received by the first communication interface, or when the second communication interface is mechanically contacted with the second external device,
In a system in which some data is transmitted from the card side, it can be considered that there is a data request when communication becomes possible with each external device as described above.

By the way, each operation of the first response control means, the second response control means, and the read limiting means is performed by one CP.
It can be realized by executing the process of U. Then, in this case, as described in the section “Prior Art”, the operating voltage is supplied to the card from the first and second external devices via the first and second communication interfaces, respectively. Then, to the CPU, the first operating voltage supplied from the first external device via the first communication interface and the second operating voltage supplied from the second external device via the second communication interface. It is conceivable that a logical sum voltage with the operating voltage of is supplied as the actual operating voltage.

However, with this configuration, when the CPU operates by receiving the logical sum voltage, the CPU functions as the first response control means and the read limiting means, and as the second response control means. It becomes impossible to know which of the above processes should be executed.

Therefore, in the information storage card according to a second aspect of the present invention, in the above structure, a command signal output means is further provided, and the command signal output means has the logical sum voltage CP.
When the first operating voltage from the first communication interface is higher than the second operating voltage from the second communication interface when the value becomes equal to or higher than the operable predetermined value of U, the CPU is notified. When the second operation voltage is larger than the first operation voltage by outputting the first command signal for executing the processing as the first response control means and the read limiting means, conversely, It outputs a second command signal for causing the CPU to execute the process as the second response control means. Then, the CPU executes processing according to the first command signal and the second command signal.

In the information storage card according to the second aspect, the first operating voltage is supplied from the first external device through the first communication interface, and the logical sum voltage becomes a predetermined value or more. Then, the CPU starts operating,
The processing as the first response control means and the processing as the read limiting means are executed. When the second operating voltage is supplied from the second external device through the second communication interface and the logical sum voltage becomes equal to or higher than a predetermined value, C
The PU starts the operation and executes the process as the second response control means.

Therefore, according to the information storage card of the second aspect, even in the system in which the operating voltages are respectively supplied from the first and second external devices, one CPU controls the first response control means. It is possible to surely realize both functions of the second response control means and the second response control means, and it is possible to further simplify the device configuration in the card.

On the other hand, the command signal output means may be configured as described in claim 3. That is, since the CPU is configured to operate by receiving the logical sum voltage of the first operating voltage and the second operating voltage, the first operating voltage and the second operating voltage
If any one of the operating voltages of the above becomes equal to or higher than a predetermined value set to be higher than a predetermined value at which the CPU can operate, CP
U becomes operable. Therefore, in the information processing card according to claim 3, the command signal output means is the first
When the operating voltage of exceeds the specified value,
Output the first command signal for executing the processing as the response control means and the read limiting means, and when the second operating voltage becomes equal to or higher than a predetermined set value, the CPU performs the processing as the second response control means. Output a second command signal for executing.

With such an information storage card, as in the information storage card according to the second aspect, one CPU realizes both functions of the first response control means and the second response control means. In addition, the device configuration in the card can be simplified.

By the way, in the information storage card according to claim 2 or 3, when the card receives a radio wave from the first external device, the second communication interface comes into contact with the second external device. If the card receives a radio wave from the first external device while the second communication interface is in contact with the second external device, the first operating voltage and the second operating voltage And the operating voltage of the both become large values, and the CPU may not be able to execute optimum processing.

Therefore, in the information storage card according to claim 4, in the information storage card according to claim 3, the command signal output means sets both the first operating voltage and the second operating voltage to predetermined values. When the value is equal to or more than the value, one of the first command signal and the second command signal, which is predetermined, is preferentially output.

Therefore, according to the information storage card of the fourth aspect, when both the first operating voltage and the second operating voltage become large values (values above the set value). Also, the CPU can be caused to execute only one of the processing as the first response control means and the read limiting means and the processing as the second response control means.

Further, in the information storage card according to claim 5, in the information storage card according to claim 3, the command signal output means sets both the first operating voltage and the second operating voltage to predetermined values. When the value becomes equal to or more than the value, one of the first command signal and the second command signal that corresponds to the operating voltage that has become the set value or more first is preferentially output.

According to the information storage card of the fifth aspect, for example, when the card receives a radio wave from the first external device, the first operating voltage becomes equal to or higher than a predetermined set value. While the CPU is executing the processing as the first response control means and the read limiting means, the second communication interface is brought into contact with the second external device and the second operating voltage is equal to or higher than a predetermined set value. Even if this happens, the CPU continues to execute the processing as the first response control means and the read limiting means until the first operating voltage becomes equal to or lower than the set value.

On the contrary, the second communication interface is brought into contact with the second external device and the second operating voltage is equal to or higher than a predetermined set value, and the CPU performs the processing as the second response control means. Even if the card receives a radio wave from the first external device and the first operating voltage becomes equal to or higher than a predetermined set value during execution, the second operating voltage becomes equal to or lower than the set value. Until then, the CPU continues to execute the processing as the second response control means.

As described above, according to the information storage card of the fifth aspect, similarly to the information storage card of the fourth aspect, the CPU performs the processing as the first response control means and the read limiting means. , And processing as the second response control means,
Only one of them can be executed and the CPU
It is possible to prevent the operation mode of (3) from being switched in the middle.

On the other hand, in the information storage card according to claim 6, the information storage card according to any one of claims 1 to 5 is provided with a magnetic stripe for recording information on the surface thereof. . According to the information storage card thus configured, it can be used in the same manner as the conventional magnetic stripe card, and the transition from the conventional card system to the card system of the present invention can be performed smoothly. become.

[0042]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An IC card according to an embodiment of the present invention will be described below. First, FIG. 2 is a block diagram showing the internal configuration of the IC card 2 of the first embodiment, and FIG.
It is an external view of the card 2. 4 and 5 are explanatory views showing the usage state of the IC card 2, respectively.

The IC card 2 of this embodiment is carried by, for example, each employee of a company. Then, as illustrated in FIG. 4, wireless communication using a microwave (hereinafter, also simply referred to as a radio wave) is used between the interrogator 6 provided in the vicinity of the door 4 and used in the entrance / exit management system for a predetermined door 4. Communicate. Further, as shown in FIG. 5, the IC card 2 of this embodiment is also used as a credit card when an employee is shopping in a company, and is used as a reader / writer 8 which is a terminal of the credit system. After being inserted, contact-type data communication is performed with the reader / writer 8.

As shown in FIGS. 2 and 3, the IC card 2
Is placed inside the plastic card body 10.
A custom IC (dedicated IC) 12 in which an electronic circuit for controlling the C card 2 is integrated into one chip, a power supply antenna 14 for receiving power supply from the interrogator 6, and a power supply antenna 1
The diode 16 which detects the radio wave from the interrogator 6 received in 4 and outputs the detected voltage as the first operating voltage RS.
And a transmission / reception antenna 18 for exchanging data with the interrogator 6, a diode 20 for detecting a reception signal received by the transmission / reception antenna 18, and a power supply for receiving power from the reader / writer 8. Via the receiving electrostatic plates 24a and 24b and the transmitting electrostatic plates 26a and 26b for exchanging data between the coil 22 and the reader / writer 8, the power supply antenna 14 and the power supply coil 22 And a capacitor 28 for stabilizing the obtained power supply voltage (operating voltage Vcc described later). In FIG. 3, the diodes 16 and 20 are
And the capacitor 28 is omitted.

Then, as shown in FIG. 2, the custom IC
Reference numeral 12 denotes a CPU 30 that executes various control processes for communicating with the interrogator 6 and the reader / writer 8, and response data to be output in response to a data request from the interrogator 6 and the reader / writer 8. A non-volatile memory (hereinafter, simply referred to as a memory) 32 for storing the sine wave and a sine wave voltage generated in the power supply coil 22 when the IC card 2 is inserted in the reader / writer 8 are rectified and rectified A diode 34 that outputs the latter voltage as a second operating voltage IS,
It has.

Further, the custom IC 12 receives the above-mentioned first and second operating voltages RS and IS, and receives the CPU 30.
And a power control unit 36 that controls the activation of the first operating voltage RS, an oscillator 38 that outputs a first clock signal CK1 to the CPU 30, and a first operating voltage RS. A reception amplifier 40 for shaping the waveform of a reception signal received by the transmission / reception antenna 18 and inputting it to the first input port Din1 of the CPU 30;
The sine wave voltage generated in the power supply coil 22 is shaped into a waveform, and is output to the CPU 30 as the second clock signal CK2. The received data from the power plates 24a and 24b is input to the second input port Din2 of the CPU 30, and the second output port Dou of the CPU 30 is input.
The transmission data output from t2 is transmitted to the electrostatic plate 2 for transmission.
6a and 26b, and the input / output part 44 which outputs.

Here, the power control unit 36 takes the logical sum of the first operating voltage RS and the second operating voltage IS and outputs the logical sum voltage as the operating voltage Vcc of the CPU 30. 48 and the operating voltage Vcc
Rise detector 50 that outputs a reset signal RST having a predetermined width to the CPU 30 when the voltage exceeds a predetermined value at which the CPU 30 can operate (for example, 2.5 V, which will be hereinafter referred to as an operation threshold Vth). The first operating voltage RS and the second operating voltage IS are compared with each other while operating in response to the operating voltage Vcc, and when the first operating voltage RS is larger, the select signal SEL to the CPU 30 is set to a high level. In contrast, when the second operating voltage IS is higher, the comparator 52 and the resistor 54 output the select signal SEL to the CPU 30 at a low level.

The select signal SEL is sent to the CPU 3
To set the operation mode of 0 to either a wireless communication mode (non-contact communication mode) for communicating with the interrogator 6 or a contact communication mode for communicating with the reader / writer 8. The high level corresponds to the wireless communication mode, and the low level corresponds to the contact communication mode.

Further, the input / output unit 44 includes a differential amplifier 44a for outputting the received data to the second input port Din2 of the CPU 30 and a second output port of the CPU 30 based on the potential difference between the receiving electrostatic plates 24a and 24b. A differential amplifier 44 that generates a potential difference between the transmission electrostatic plates 26a and 26b based on the transmission data output from Dout2.
b.

In this embodiment, the power supply antenna 14, the transmission / reception antenna 18, and the diodes 16 and 18 are used.
Corresponds to the first communication interface, and the power supply coil 2
2, the receiving electrostatic plates 24a and 24b, the transmitting electrostatic plates 26a and 26b, and the diode 34 correspond to the second communication interface, and the rising detector 50, the comparator 52, and the resistor 54 of the power control unit 36. The part consisting of corresponds to the command signal output means. The reset signal RST output from the rise detector 50 and the high-level select signal SEL output from the comparator 52 correspond to the first command signal, and the reset signal RS
T and the low-level select signal SEL correspond to the second command signal. Further, in FIG. 2, reference numeral 56 is a capacitor for stabilizing the second operating voltage IS.
8 is a transmission / reception antenna 18 input to the reception amplifier 40.
It is a pull-down resistor for stabilizing the received signal from.

On the other hand, in the IC card 2 of this embodiment,
As shown in FIG. 6, the storage area (storage area) in the memory 32 is divided into a plurality of areas (four in this embodiment) according to the importance (security level) of the data to be stored. The employee number is stored in the first area of the memory 32 as an identification code (ID data) of the person who carries the IC card 2, and the second area is stored in the second area.
As the data with a low security level, data representing the interrogator number and the reader / writer number that can be used by the IC card 2 is stored. In the third area, data with a medium security level is stored in the credit card. Data representing the credit line and the cumulative amount of use of the credit card are stored, and data representing the credit number is stored in the fourth area as the data having the highest security level.

The credit line is the maximum amount of money that can be used (borrowed) within a predetermined period (for example, one month) when the IC card 2 is used as a credit card, and the accumulated amount of use. Is the cumulative amount of money actually used during the above period. Then, the I configured in this way
Interrogator 6 for hardware operation of C card 2
A communication procedure with the reader / writer 8 will be described with reference to FIGS. 7 and 8. 7 shows the IC card 2
And FIG. 8 is an explanatory view showing a communication procedure between the interrogator 6 and FIG.
5 is an explanatory diagram showing a communication procedure between the IC card 2 and the reader / writer 8. FIG. Further, in the following description, the numbers starting with J in () indicate the states in FIGS. 7 and 8.

First, the case where the IC card 2 is used in the door entrance / exit management system will be described. As shown in FIG. 4, the interrogator 6 is configured to transmit radio waves at all times or to emit radio waves when a human approach is detected (J1), and the employee carrying the IC card 2 Stands in front of the interrogator 6 (J2), the electric wave from the interrogator 6 is received by the power supply antenna 14.

Then, the radio wave received by the power supply antenna 14 is converted into the first operating voltage RS by the diode 16, and the first operating voltage RS is supplied to the oscillator 38 and the receiving amplifier 40. Also, the first operating voltage RS
Via the diode 46 of the power control unit 36,
It is supplied to U30 as an operating voltage Vcc.

When the first operating voltage RS increases and the operating voltage Vcc exceeds the operating threshold Vth, the rising detector 50 of the power control unit 36 causes the CPU to operate.
A reset signal RST is output to the CPU 30, whereby the CPU 30 starts its operation from the initial state (J
3). In this case, the second operating voltage IS is 0V.
Since the first operating voltage RS is higher, the comparator 52 of the power control unit 36 outputs the high-level select signal SEL to the CPU 30. Therefore,
The CPU 30 uses the first clock signal CK from the oscillator 38.
Using 1 as its own operation clock, processing is executed in the wireless communication mode, and thereby remote processing to be described later is executed (J4).

When the execution of this remote processing is started, the IC card 2 first transmits the employee number as ID data from the transmitting / receiving antenna 18 (J5).
The transmission operation in the wireless communication mode is performed by the CPU 30 by outputting the transmission data from the first output port Dout1. Then, the load on the transmission / reception antenna 18 changes according to the transmission data, so that the reflection state of the radio wave from the interrogator 6 changes. Therefore, the interrogator 6
The transmission data from the IC card 2 is received by detecting the change in the reflection state.

When the interrogator 6 receives the employee number from the IC card 2, the interrogator 6 issues a data read command to the IC card 2 to request data representing the interrogator number that can be used by the card. Send (J6). still,
This data read command is for
The storage area in the memory 32 in which the data is stored is designated.

Then, the data read command is
Received by the transmitting / receiving antenna 18 of the IC card 2,
The first input port D of the CPU 30 via the receiving amplifier 40
Input to in1. Then, on the IC card 2 side, the CPU 30 reads the data representing the number of the interrogator that can be used from the memory 32 (J7), and transmits the read data from the transmitting / receiving antenna 18 in exactly the same manner as the case of the ID data. (J8).

When the interrogator 6 receives the data indicating the usable interrogator number transmitted from the IC card 2, this time, the access history indicating that the IC card 2 has accessed itself and the like. The data and a data write command for writing the access history data to the memory 32 of the IC card 2 are transmitted (J9).
It should be noted that this data write command specifies a storage area in the memory 32 in which data should be written.

Then, the access history data and the data write command are received again by the transmitting / receiving antenna 18 of the IC card 2, and the IC card 2 writes the received access history data in the memory 32 (J1
0), the written data is transmitted to the interrogator 6 as verify data (J11).

Then, the interrogator 6 receives the verification data from the IC card 2 and compares the data with the access history data transmitted by the interrogator 6 to obtain the IC data.
Confirm that the data was written correctly on the card 2,
After that, a sleep command indicating the end of communication is transmitted to the IC card 2 (J12).

When the IC card 2 receives the sleep command from the interrogator 6, the CPU 30 terminates the execution of the processing (J13), whereby the communication between the IC card 2 and the interrogator 6 is terminated. It should be noted that the interrogator 6 is a valid interrogator from the IC card 2 because all of the above communications have been completed successfully and the employee number from the IC card 2 is registered as a person who can pass through the door 4. When it is determined that the number matches the own number and the access history data sent to the IC card 2 and the verification data returned from the IC card 2 match, the entry / exit from the door 4 is confirmed. When it is possible (J14), the door 4 is unlocked (J15). On the other hand, if any of the above conditions is missing, the door 4 is kept locked and the person carrying the IC card 2 is prohibited from passing (J1.
6).

As described above, when the IC card 2 is used in the door entry / exit management system, the IC card 2 is used.
Receives electric waves from the interrogator 6 by the power supply antenna 14 to acquire power for self-operation, and wirelessly communicates with the interrogator 6 via the transmission / reception antenna 18.

Next, the case where the IC card 2 is used as a credit card will be described. First, as shown in FIG. 5, when the IC card 2 is inserted into the reader / writer 8, the power supply coil 22 on the IC card 2 side, the receiving electrostatic plates 24a, 24b, and the transmitting coil 22 are provided. A power supply coil 60 and transmission electrostatic plates 62a and 62, which are arranged to face the electrostatic plates 26a and 26b, respectively.
b and the receiving electrostatic plates 64a and 64b are provided.

Then, when the IC card 2 is inserted into the insertion port 8a of the reader / writer 8 (J21), the power supply coil 60 on the reader / writer 8 side is activated, and the IC card 2
A sine wave voltage is generated in the power supply coil 22 by electromagnetic coupling (J22). Then, the sine wave voltage generated in the power supply coil 22 is converted into the second operating voltage IS by the diode 34, and the second operating voltage IS is
The operating voltage Vcc is supplied to the CPU 30 via the diode 48 of the power control unit 36 while being supplied to the input / output unit 44.
Supplied as Further, the sine wave voltage generated in the power supply coil 22 is waveform-shaped by the clock amplifier 42 and input to the CPU 30 as the second clock signal CK2.

When the operating voltage Vcc becomes equal to or higher than the operation threshold value Vth, the rising detector 50 of the power control section 36 outputs a reset signal RST to the CPU 30, whereby the CPU 30 starts its operation from the initial state. Yes (J23). Further, in this case, since the first operating voltage RS is 0V and the second operating voltage IS is larger, the comparator 52 of the power control unit 36 outputs C
A low-level select signal SEL is output to PU30. Therefore, the CPU 30 executes the processing in the contact communication mode using the second clock signal CK2 from the clock amplifier 42 as its own operation clock, thereby executing the IC card processing described later (J24).

When the execution of this IC card processing is started, the IC card 2 first detects the communication speed, the capacity of the memory 32, etc. from the transmission electrostatic plates 26a and 26b.
An ATR (answer-to-reset) indicating its own specifications is transmitted (J25). Here, in the transmission operation in the contact communication mode, the CPU 30 outputs the transmission data from the second output port Dout2, and the differential amplifier 44b of the input / output unit 44.
However, according to the transmission data, the transmission electrostatic plate 26
This is performed by generating a potential difference between a and 26b. Then, the transmitting electrostatic plates 26a, 2b are also provided between the receiving electrostatic plates 64a, 64b on the reader / writer 8 side.
Since a potential difference according to the transmission data from the IC card 2 occurs due to the capacitor coupling with the IC card 6b, the reader / writer 8 detects the potential difference between the receiving electrostatic plates 64a and 64b, and Receive the transmission data of.

When the reader / writer 8 receives the ATR from the IC card 2, the reader / writer 8 requests the IC card 2 for data representing the employee number and the reader / writer number usable by the card. A data read command is transmitted (J26). Incidentally, this data read command also designates the data to be acquired and the storage area in the memory 32 in which the data is stored, as in the case of the entrance / exit management of the door 4. Further, the transmission operation on the reader / writer 8 side is exactly the same as the transmission operation on the IC card 2 side described above, and the transmission electrostatic plates 62a and 62b.
This is performed by generating a potential difference according to the transmission data in the meantime.

Then, the transmission electrostatic plate 6 is provided between the reception electrostatic plates 24a and 24b on the IC card 2 side.
Since a potential difference according to the transmission data from the reader / writer 8 is generated by the capacitor coupling with 2a and 62b, the potential difference is converted into a digital signal by the differential amplifier 44a of the input / output unit 44 on the IC card 2 side. . Then, the digital signal is input to the second input port Din2 of the CPU 30 as a reception signal.

On the IC card 2 side, the CPU
The memory 30 reads the data representing the employee number and the data representing the usable reader / writer number from the memory 32 (J27), and the read data is transmitted in the same manner as in the case of the ATR, the transmission electrostatic plate 26a. , 26b (J28).

Then, the reader / writer 8 determines the IC card 2 based on the data transmitted from the IC card 2.
Determines whether the card can be used as a credit card (J
29) If it is determined to be unusable, the process is interrupted (J30), but if it is determined to be usable, a security cancellation command and a personal identification number are transmitted to the IC card 2 (J31). The security release command is a request for the IC card 2 to permit access (read / write) to the third area and the fourth area of the memory 32, and the personal identification number is a reader / writer. 8 is a number for mutual authentication which is predetermined between the IC card 2 and the IC card 2.

The IC card 2 includes the receiving electrostatic plate 24.
When the security release command and the personal identification number are received from the reader / writer 8 via a and 24b, the received personal identification number is compared with the personal identification number, and if they match, the number in the memory 32 is checked. The access to the 3rd area and the 4th area is enabled (security is released), and a release confirmation response indicating that the security is released is transmitted to the reader / writer 8 (J32, J33).

When the reader / writer 8 receives the cancellation confirmation response from the IC card 2, the reader / writer 8
A data read command for requesting data representing the credit number, credit line, and accumulated usage amount stored in the third and fourth areas of the memory 32 is transmitted (J34).

When the IC card 2 receives the command, on the IC card 2 side, the CPU 30 causes the memory 3
The data indicating the credit number, the credit line, and the accumulated usage amount is read from 2 (J35), and the read data is transmitted from the transmission electrostatic plates 26a and 26b (J36).

Then, the reader / writer 8 judges based on the data from the IC card 2 whether or not credit is possible (J37). If it is judged that credit is impossible, the processing is interrupted (J38). When it is determined that credit is possible, a predetermined credit process is executed by inputting the amount of credit used this time and exchanging with the host machine. Then, after that, the data showing the latest accumulated use amount and the accumulated use amount data are transferred to the IC card 2.
A data write command for writing in the memory 32 of the C card 2 is transmitted (J39). Note that this data write command also designates a storage area in the memory 32 in which data should be written, as in the case of the entrance / exit management of the door 4.

Then, the IC card 2 receives the data from the reader / writer 8 and writes the latest usage accumulated amount data to the memory 32 (J40), and then indicates that the writing of the data is completed. The end response is transmitted (J41). When the reader / writer 8 receives the write end response from the IC card 2 and confirms that the data has been written to the IC card 2, the reader / writer 8 transmits a sleep command indicating the end of communication to the IC card 2 (J42). . Then, in the IC card 2, when the sleep command from the reader / writer 8 is received, the CPU 30 ends the execution of the processing (J43), whereby the communication between the IC card 2 and the reader / writer 8 ends.

When the reader / writer 8 completes the series of communications, the reader / writer 8 issues a slip in which the credit amount used this time is recorded to the carrier of the IC card 2 (J4
4). In this way, when the IC card 2 is used as a credit card, the IC card 2 is for self-operation by receiving power from the reader / writer 8 (power supply coil 60) at the power supply coil 22. In addition to acquiring the electric power, the contact-type data communication is performed with the reader / writer 8 via the receiving electrostatic plates 24a and 24b and the transmitting electrostatic plates 26a and 26b.

Next, the control process executed by the CPU 30 for the IC card 2 to communicate with the interrogator 6 and the reader / writer 8 as shown in FIGS. 7 and 8 will be described with reference to FIG. ~ It demonstrates using the flowchart shown in FIG. Note that FIG. 9 is a flowchart showing the overall processing executed by the CPU 30. 10 is a flowchart showing the remote processing executed in the overall processing, and FIG. 11 is a flowchart showing the IC card processing executed in the overall processing.

First, in the overall processing shown in FIG. 9, the operating voltage Vcc of the CPU 30 is set to the operating threshold value Vth as described above.
As described above, the execution is started when the reset signal RST is output from the rising detector 50 of the power control unit 36. Then, as shown in FIG. 9, when starting the execution of this entire process, the CPU 30 first determines in step (hereinafter simply referred to as S) 110 whether or not the select signal SEL is at a high level. When it is determined that the select signal SEL is at the high level, the wireless communication mode process of S120 to S140 for communicating with the interrogator 6 is executed.

That is, in S120, among the input / output ports, the first input port Din1 and the first output port Dou
Only t1 is validated, and in the subsequent S130, a process as a read limiting means is executed to limit the readable / writable (accessible) storage area of the memory 32 to only the first area and the second area. And S14 continues
At 0, after executing the remote processing as the first response control means, the whole processing is ended.

On the other hand, when it is determined in S110 that the select signal SEL is not at the high level (that is, at the low level), the contact communication mode consisting of S150 and S160 for performing communication with the reader / writer 8. The process of is executed. That is, in S150, among the input / output ports,
Second input port Din2 and second output port Dout2
Then, in S160, the ID card process as the second response control means is executed, and then the whole process is ended.

Here, the remote processing (S140) as the first response control means is executed as shown in FIG. That is, when the execution of this remote processing is started, first, in S210, a command is not yet received in the wait flag indicating whether or not the data read command or the data write command from the interrogator 6 has already been received. Set "0" indicating that there is no.

Then, in the following S220, it is determined whether or not the wait flag is set to "1", and "1" is set.
If it is determined that is not set, it is considered that the IC card 2 first receives the radio wave from the interrogator 6, and this is considered to be a transmission request of ID data from the interrogator 6, and S230 Proceed to.

In S230, the employee number as ID data is read from the first area of the memory 32, and the read ID data is output from the first output port Dout1. Then, the employee number is transmitted to the interrogator 6, as indicated by J5 in FIG.

When the processing of S230 is executed,
Alternatively, when it is determined in S220 that the wait flag is set to "1", the process proceeds to S240 and it is determined whether or not a command from the interrogator 6 is received. When it is determined that the command has not been received, S
Return to 220 and repeat the processing of S220 to S240,
When it is determined in S240 that the command from the interrogator 6 is received, the process proceeds to S250.

In S250, the type of the command received this time is determined and the command is determined to be the data read command shown in J6 of FIG. 7, or the data write command shown in J9 of FIG. If it is determined that the wait flag is "1", the process proceeds to S260.
Is set.

Then, in subsequent S270, it is judged whether or not the storage area of the memory 32 designated by the received command is readable / writable, and if it is not readable / writable, that is, the received data read command or data is received. When the write command designates the third area and the fourth area which are not permitted in S130, the process returns to S220.

On the other hand, when it is determined in S270 that the storage area of the memory 32 designated by the received command is readable and writable, that is, the designated storage area is the first area or the second area. In case S
In step 280, it is determined whether the received command is a data read command. If it is determined that the command is a data read command, the process proceeds to step S290.

Then, in S290, the data specified by the command is read from the storage area of the memory 32 specified by the received data read command, and in the subsequent S300, the read data is output from the first output port Dout1. Output. Then, the read data is transmitted to the interrogator 6, as indicated by J8 in FIG. Then, after executing the process of S300, S2
Return to 20.

On the other hand, if it is determined in S280 that the received command is not a data read command, that is, if it is determined that it is a data write command, S
Move to 310. Then, in S310, the data transmitted together with the command is written in the storage area of the memory 32 designated by the received data write command, and then the process proceeds to S290. S3
When the process shifts from S10 to S290, in S290,
The data written in S310 is read, and the subsequent S300
Then, the read data is transmitted. As a result, as shown in J11 of FIG. 7, the IC card 2
The verification data will be transmitted from the interrogator 6 to the interrogator 6.

On the other hand, if it is determined in S250 that the command received this time is the sleep command shown in J12 of FIG. 7, the process proceeds to S320 and the CPU
The operation of 30 is ended. Then, this completes the execution of the remote processing. That is, in this remote processing, first, the employee number as ID data is transmitted to the interrogator 6 (S230), and when the data read command from the interrogator 6 is received (S280: YES), the command is designated by the command. The data specified by the command is read from the storage area of the memory 32 (S2
90), the read data is transmitted to the interrogator 6 (S300). When a data write command from the interrogator 6 is received (S280: N
O), the data sent together with the command is written in the storage area of the memory 32 designated by the command (S310). Then, when the sleep command is received from the interrogator 6, the communication operation is ended (S320).

By executing such processing, communication with the interrogator 6 shown in FIG. 7 is realized. However, when this remote processing is executed, the above-described S13 is performed in advance.
Memory 32 that can access data by processing 0
Storage area is limited to only the first area and the second area that store low security level data. Therefore, temporarily, from the interrogator 6 side,
When a command requesting access to the area and the fourth area is transmitted, access to the memory 32 is prohibited (S270: NO).

Next, the IC card processing (S160) as the second response control means is executed as shown in FIG. That is, when the execution of this IC card process is started,
First, in S410, the data access right is set to a low level. That is, in this S410, the above-mentioned S130 is performed.
Similar to the process of (1), of the storage areas of the memory 32, the readable / writable storage areas are set only to the first area and the second area. In the following description, from the state in which only the first area and the second area of the memory 32 are set to be readable and writable as described above, it is set that the third and fourth areas are also set to be readable and writable. Security release ”.

Then, in subsequent S420, the above-mentioned ATR is read from the memory 32, and the read ATR is output from the second output port Dout2. Then, as shown in FIG.
The ATR is transmitted to the reader / writer 8 as indicated by J25. Although not shown in FIG. 6, the AT
R is stored in advance in the first area or the second area of the memory 32.

Then, in subsequent S430, it is determined whether or not a command from the reader / writer 8 is received, and the process waits until it is determined that the command is received. And this S
If it is determined in 430 that the command has been received, S44
8, the type of the command received this time is judged and it is judged that the command is the data read command shown in J26 and J34 of FIG. 8, or J3 of FIG.
When it is determined that the command is the data write command shown in 9, the process proceeds to S450.

In S450, it is determined whether the storage area of the memory 32 designated by the received command is readable / writable. If it is determined that the storage area is not readable / writable, the process returns to S430. On the other hand, when it is determined in S450 that the storage area of the memory 32 designated by the received command is readable / writable, S46
The process proceeds to 0 to determine whether the received command is a data read command. If it is determined to be a data read command, the process proceeds to S470.

Then, in S470, the data specified by the command is read from the storage area of the memory 32 specified by the received data read command, and in the subsequent S480, the read data is output from the second output port Dout2. Output. Then, the read data is transmitted to the reader / writer 8 as indicated by J28 and J36 in FIG. Then, after executing the process of S480, the process returns to S430.

If it is determined in S460 that the received command is not a data read command, that is, if it is a data write command, S
Move to 490. Then, in S490, the data transmitted together with the command is written in the storage area of the memory 32 designated by the received data write command, and in the subsequent S500, as shown in J41 of FIG. A write end response indicating that the writing has been completed is transmitted. Then, after executing the process of S500, the process returns to S430.

On the other hand, when it is determined in S440 that the command received this time is the security release command shown in J31 of FIG. 8, the process proceeds to S510, and the personal identification number transmitted together with the command is set. Confirm. Then, in subsequent S520, the received personal identification number from the reader / writer 8 is compared with the personal identification number, and if it is determined that they do not match, the process returns to S430 and the two match. If so, the process proceeds to S530.

Then, in step S530, the security of the memory 32 is released, and in step S540, J33 of FIG.
As shown in, after transmitting the cancellation confirmation response indicating that the security has been canceled, the process returns to S430. Meanwhile,
If it is determined in S440 that the command received this time is the sleep command shown in J42 of FIG.
Then, the process proceeds to 550 and the operation of the CPU 30 ends.
Then, this completes the execution of the IC card process.

That is, in this IC card processing, first,
After setting the storage area of the readable / writable memory 32 to only the first area and the second area (S410), the ATR indicating its own specifications is transmitted to the reader / writer 8 (S420). When a data read command from the reader / writer 8 is received (S460: Y
ES), the data designated by the command is read from the storage area of the memory 32 designated by the command (S470), and the read data is transmitted to the reader / writer 8 (S480). When a data write command is received from the writer 8 (S460: NO), the data sent with the command is written to the storage area of the memory 32 designated by the command (S460).
490), the data for the third area and the fourth area of the memory 32 is received until the security code is received from the reader / writer 8 and the security code sent together with the command coincides with the own security code. Read / write is prohibited (S450, S510
~ S530).

By executing such processing, communication with the reader / writer 8 shown in FIG. 8 is realized.
As described above, in the IC card 2 of the first embodiment, the CPU 30 executes the remote processing to perform wireless communication with the interrogator 6 via the transmission / reception antenna 18, and the CPU 30 By executing the IC card processing, the receiving electrostatic plates 24a, 24b
Also, communication is performed with the reader / writer 8 via the transmission electrostatic plates 26a and 26b.

At the time of executing the remote processing, the memory 3 is responded to in response to the data read command from the interrogator 6.
2 to read data, and the read data is transmitted from the transmitting / receiving antenna 18, and I
When the C card process is executed, data is read from the memory 32 in response to a data read command from the reader / writer 8 and the read data is transmitted from the transmission electrostatic plates 26a and 26b.

Here, in particular, in the IC card 2 of this embodiment, the storage areas of the memory 32 commonly used during communication with the interrogator 6 and the reader / writer 8 are from the first area to the fourth area. The data is divided into four areas, and data with a high security level is stored in order from the first area to the fourth area. Then, during communication with the interrogator 6 in which remote processing is executed, S130 of the overall processing (FIG. 9) is executed, so that the storage area of the memory 32 in which data can be read and written has a low security level. Is limited to only the first area and the second area.

Therefore, in the IC card 2 of the present embodiment, various data in the memory 32 can be read from the reader / writer 8 which requires mechanical contact and does not worry about data interception (radio wave interception). However, for the interrogator 6 that exchanges data by wireless communication that has the possibility of intercepting the data, a command for temporarily reading the data stored in the third and fourth areas of the memory 32 is used. Even if the data is received, the access to the memory 32 is prohibited, which prevents the transmission of data having a high security level by radio waves.

Therefore, according to the IC card 2 of the present embodiment, it is possible to completely prevent the interception of data having a high security level, and in turn, the transmitting / receiving antenna 1
Ease of use by wireless communication (non-contact type) using 8 and high security by contact communication (contact type) using the receiving electrostatic plates 24a, 24b and the transmitting electrostatic plates 26a, 26b. It can be realized regardless of the simple configuration in which 32 is shared.

On the other hand, in the IC card 2 of the first embodiment, the first operating voltage RS supplied by the radio wave from the interrogator 6 and the second operating voltage RS supplied from the reader / writer 8 side.
Is used as the operating voltage Vcc of the CPU 30, and the operating voltage Vcc is CP.
The rise detector 50 of the power controller 36 outputs the reset signal RST to the CPU 30 when the operation threshold value Vth of the U30 or more is reached. Further, the comparator 52 of the power control unit 36 causes the first operating voltage R
S is compared with the second operating voltage IS, and when the first operating voltage RS is higher, the select signal SEL is output to the CPU 30 at a high level for instructing the wireless communication mode, and conversely the second operating voltage is output. When the voltage IS is larger, C
The select signal SEL is output to the PU 30 at a low level instructing the contact communication mode.

Therefore, according to the IC card 2 of the first embodiment, when the radio wave from the interrogator 6 is received, the CPU 30 executes the wireless communication mode processing (S120 to S140),
When inserted in the reader / writer 8, the CPU 30 executes the contact communication mode processing (S150, S160), and the operating voltages RS and IS are supplied from the interrogator 6 side and the reader / writer 8 side, respectively. Despite the above configuration, one CPU 30 can be surely caused to execute either one of the processing in the wireless communication mode and the processing in the contact communication mode, and by extension, in the IC card 2 concerned. The device configuration can be further simplified.

By the way, the IC card 2 of the first embodiment described above.
Then, the first operating voltage RS and the second operating voltage IS are compared in magnitude by the comparator 52, and the wireless communication mode and the contact communication mode are switched according to the comparison result. Therefore, for example, the IC card 2 is inserted into the reader / writer 8 while receiving the radio wave from the interrogator 6, or receives the radio wave from the interrogator 6 while being inserted into the reader / writer 8. In such a very special case, the first operating voltage RS and the second operating voltage IS
And both become large values, and the CPU 30 may not be able to execute optimal processing.

Then, as a second embodiment, an IC card which can solve such a problem will be described with reference to FIG. Note that FIG. 12 is an explanatory diagram for explaining the power control unit provided in the IC card of the second embodiment. The IC card of the second embodiment is the same as the IC card 2 of the first embodiment described above except for the configuration of the power control unit 36 provided inside the custom IC 12, and is otherwise the same.

That is, as shown in FIG. 12A, the power control unit 66 provided in the IC card of the second embodiment is different from the power control unit 36 of the first embodiment in that the rising edge detector 5 is used.
0, the comparator 52, and the resistor 54, instead of two voltage detectors 68, 70 and two rising detectors 72,
74, an AND gate 76, an inverter 78, and an OR gate 80.

Here, the voltage detector 68 detects the first operating voltage RS, and the voltage value thereof is equal to the operating threshold value Vth of the CPU 30 by the voltage drop at the diodes 46 and 48 (for example, 0.8V). ) A predetermined set value (Vth +
When Vd) or higher, a high level signal is output. In addition, the voltage detector 70 uses the second operating voltage IS
Is detected, and when the voltage value becomes equal to or higher than the set value (Vth + Vd), a high level signal is output.

Then, the power control unit 66 of the second embodiment.
In, the output signal of the voltage detector 68 and the signal obtained by inverting the output signal of the voltage detector 70 by the inverter 78 are input to the AND gate 76, and the output signal of the AND gate 76 is sent to the CPU 30 and the select signal SEL. Is output as.

Further, when the output signal of the AND gate 76 (that is, the select signal SEL) rises from the low level to the high level, the rise detector 72 outputs a pulse signal of a predetermined width, and the voltage detector 70 outputs the pulse signal. When the output signal rises from the low level to the high level, the rising edge detector 74 outputs a pulse signal of a predetermined width, and the output signal of the rising edge detector 72 and the output signal of the rising edge detector 74 are separated from each other. , OR gate 80 outputs a logical sum signal to the CPU 30 as a reset signal RST.

A second device having such a power control unit 66
In the IC card of the embodiment, as shown in FIG. 12 (B), of the first operating voltage RS and the second operating voltage IS, only the first operating voltage RS is the set value (Vth + V).
d) and above, the AND gate 76 to the CPU 30
To the CPU 30. At the same time, the rising detector 72 outputs the reset signal RST having a predetermined width to the CPU 30 via the OR gate 80. Therefore, when the IC card receives a radio wave from the interrogator 6 in a state where the IC card is not inserted in the reader / writer 8, the CPU 30 executes the process in the wireless communication mode.

The first operating voltage RS (voltage detector 6
8) and the second operating voltage IS exceeds the set value (Vth + Vd), the AND gate 7
6 to CPU 30, select signal SEL of low level
Is output, and at the same time, the rising detector 74 outputs a reset signal RST having a predetermined width to the CPU 30 via the OR gate 80. Therefore, regardless of whether or not the radio wave from the interrogator 6 is received, if the IC card is inserted into the reader / writer 8, the CPU 30 will execute the processing in the contact communication mode.

In FIG. 12B, M1 is CP
U30 represents a period in which the wireless communication mode process is executed, and M2 represents a period in which the contact communication mode process is executed by the CPU 30. That is, the second
In the IC card of the embodiment, if at least one of the first operating voltage RS and the second operating voltage IS becomes the set value (Vth + Vd) or more, the CPU 30 is supplied with the voltage of the operation threshold Vth or more. Paying attention to the fact that the first operation voltage RS is set to the above set value (Vth
+ Vd) or more, reset signal RS to CPU 30
T is output and the select signal SEL is set to the high level, and the second operating voltage IS is set to the above set value (Vth +
When Vd) or more, a reset signal RST is sent to the CPU 30.
Is output and the select signal SEL is set to low level.

Further, the power controller 6 of the second embodiment.
In No. 6, when both the first operating voltage RS and the second operating voltage IS exceed the set value (Vth + Vd), the select signal SEL is preferentially output at the low level, and the contact communication is performed. Mode processing is executed with priority.

Therefore, according to the IC card of the second embodiment, when the IC card is inserted into the reader / writer 8 while receiving the radio wave from the interrogator 6, the CP
U30 immediately starts executing the processing in the contact communication mode, and when the IC card receives the radio wave from the interrogator 6 while being inserted in the reader / writer 8, the CPU
30 does not perform the process in the wireless communication mode, but continuously executes the process in the contact communication mode.

As described above, according to the IC card of the second embodiment, even when the first operating voltage RS and the second operating voltage IS both have large values, the CPU 30 is in the wireless communication mode. Only one of the processing and the contact communication mode processing can be executed reliably.

In the IC card of the second embodiment, the contact communication mode process is executed with priority, but the wireless communication mode process may be executed with priority. Good. In the case of a system in which the first operating voltage RS and the second operating voltage IS do not exceed the operating threshold value Vth at the same time, for example, FIG.
In the power control unit 66 of (A), the AND gate 76
The output signal of the voltage detector 68 can be directly input to the rising detector 72 and can be output to the CPU 30 as the select signal SEL.

Next, regarding the IC card of the third embodiment,
This will be described with reference to FIG. Note that FIG. 13 is an explanatory diagram for explaining the power control unit provided in the IC card of the third embodiment. The IC card of the third embodiment is different from the IC card of the second embodiment described above only in the configuration of the power control unit 66 provided inside the custom IC 12, and is otherwise the same.

That is, as shown in FIG. 13A, the power control unit 82 provided in the IC card of the third embodiment is different from the power control unit 66 of the second embodiment in that the AND gate 84 is provided.
And an inverter 86 are additionally provided. The output signal of the voltage detector 70 and the signal obtained by inverting the output signal of the AND gate 76 by the inverter 86 are input to the AND gate 84, and the output signal of the AND gate 84 is input to the rising edge detector 74. At the same time, it is inverted by the inverter 78 and input to the AND gate 76.

A third device equipped with such a power control unit 82.
In the IC card of the embodiment, for example, FIG.
As shown in, the first operating voltage RS and the second operating voltage I
When the first operating voltage RS of S becomes higher than the set value (Vth + Vd) first, the AND gate 76 outputs the high-level select signal SEL to the CPU 30, and at the same time, the rising detector 72 outputs Reset signal RS of a predetermined width is sent to the CPU 30 via the OR gate 80.
T is output. Therefore, in this case, the CPU 30 executes the process in the wireless communication mode.

Then, the first operating voltage RS is set to the set value (V
If the second operating voltage IS exceeds the set value (Vth + Vd) when the voltage is equal to or more than th + Vd), the inverter 8
Since the output signal of 6 is at the low level, the output signal of the AND gate 84 also remains at the low level, and thus the select signal SEL remains at the high level, and the reset signal RST is not output.

After that, the second operating voltage IS is set to the set value (V
If the first operating voltage RS becomes smaller than the set value (Vth + Vd) while the voltage remains above th + Vd),
At that time, for the first time
At the same time, a low-level select signal SEL is output, and a high-level output signal is output from the AND gate 84. At the same time, the rising detector 74 sends a reset signal RST to the CPU 30 via the OR gate 80.
Is output. Therefore, from this time point, the CPU 30 starts executing the process in the contact communication mode.

Note that in FIG. 13B as well, FIG.
Similar to (B), M1 represents a period during which the processing in the wireless communication mode is executed by the CPU 30, and M2 represents
The period during which the contact communication mode process is executed by the CPU 30 is shown. Then, as shown in FIG. 13A, the power control unit 82 of the third embodiment has a completely symmetrical configuration with respect to each of the first operating voltage RS and the second operating voltage IS. Therefore, contrary to the example shown in FIG. 13B, the second operating voltage IS has a set value (Vth +
Vd) or more, and then the first operating voltage RS becomes the set value (Vth + Vd) or more, first, when the second operating voltage IS becomes the set value (Vth + Vd) or more, the CPU 30 To the low-level select signal S
The EL is output and the reset signal RST is output, and then the second operating voltage IS is set to the set value (Vth + V
Only when it becomes smaller than d), the high level select signal SEL is output to the CPU 30, and the reset signal RST is output from the rising edge detector 72 to the CPU 30 via the OR gate 80.

That is, in the IC card of the third embodiment, when both the first operating voltage RS and the second operating voltage IS exceed the set value (Vth + Vd), the level of the select signal SEL is changed. , Set value (Vth + Vd) first
The output voltage is held at the level corresponding to the above operating voltage.

Therefore, according to the IC card of the third embodiment, both the first operating voltage RS and the second operating voltage IS have large values, as in the IC card of the second embodiment. Even in the case of the above, the CPU 30 can be surely caused to execute only one of the processing in the wireless communication mode and the processing in the contact communication mode, and moreover, it is possible to prevent the operation mode of the CPU 30 from being switched in the middle. .

Next, regarding the IC card of the fourth embodiment,
This will be described with reference to FIG. Incidentally, FIG. 14 shows I of the fourth embodiment.
It is an external view of a C card 88. As shown in FIG. 14, the IC card 88 of the fourth embodiment is different from the IC cards of the first to third embodiments described above in that a magnetic stripe 90 for information recording is provided on the surface of the plastic card body 10. I am trying to provide it.

Further, according to the IC card 88 of the fourth embodiment constructed as described above, it can be used in the same manner as the conventional magnetic stripe card, so that the book provided with the memory 32 from the conventional card system. It becomes possible to smoothly perform the transition to the card system of the embodiment.

By the way, the IC card of each of the above-described embodiments is provided with the power supply antenna 14 and the transmission / reception antenna 18 as a communication interface with the interrogator 6, and the power supply coil 22 as a communication interface with the reader / writer 8. , The receiving electrostatic plates 24a, 24b and the transmitting electrostatic plates 26a, 26b are provided, but it is possible to use various configurations as a communication interface for communicating with each device. it can. Therefore, an IC card having a communication interface having another configuration will be described below with reference to FIGS.

First, FIG. 15 is a block diagram showing the internal structure of the IC card 90 of the fifth embodiment. As shown in FIG. 15, this IC card 90 is different from the IC card 2 of the first embodiment in that the power supply antenna 14 and the transmission / reception antenna 1 are used.
The difference is that one antenna 92 for both power supply and transmission is provided instead of eight.

That is, in the IC card 90 of the fifth embodiment,
Power is supplied from the interrogator 6 by one antenna 92, and data is transmitted / received to / from the interrogator 6. In FIG. 15, 93 is a resistor for preventing the first operating voltage RS from changing when transmitting the transmission data from the first output port Dout1 of the CPU 30, that is, at the time of transmitting the data.

Next, FIG. 16 is a block diagram showing the internal structure of the IC card 94 of the sixth embodiment. As shown in FIG. 16, this IC card 94 is different from the IC card 90 of the fifth embodiment in that it has a power supply / transmission / reception coil 96 instead of the power supply / transmission / reception antenna 92. ,
It is different from the oscillator 38 in that it includes a clock amplifier 98 for shaping the sine wave voltage generated in the coil 96 and outputting it as the first clock signal CK1.

That is, the IC card 94 of the sixth embodiment carries out communication with the interrogator 6 in an electromagnetic induction system (electromagnetic coupling system) using medium to short wave radio waves, and one coil As in the case of the power supply coil 22, the power is supplied from the interrogator 6 by the 96, and data is transmitted / received to / from the interrogator 6.

Next, FIG. 17 is a block diagram showing the internal structure of the IC card 100 of the seventh embodiment. As shown in FIG. 17, this IC card 100 is the IC of the sixth embodiment.
Receiving electrostatic plates 24a, 24b for the card 94
And the transmission electrostatic plates 26a and 26b are not provided, and instead of the input / output unit 44, the demodulator 102a that demodulates the signal received by the power supply coil 22 and the transmission data output from the CPU 30 are modulated. The input / output unit 102 includes a modulator 102b that outputs the power to the power supply coil 22.

That is, the IC card 100 of the seventh embodiment is
Communication is performed with the reader / writer 8 by an electromagnetic induction method using the power supply coil 22 instead of the electrostatic plate. And one power supply coil 2
2 receives power from the reader / writer 8 and transmits / receives data to / from the reader / writer 8.

Next, FIG. 18 is a block diagram showing the internal structure of the IC card 104 of the eighth embodiment. As shown in FIG. 18, this IC card 104 is the IC of the seventh embodiment.
For the card 100, the power supply coil 22 and the input / output unit 1
02, instead of the reader / writer 8
5 terminals 106a-10 electrically contacting the terminals on the side
6e. The terminals 106a and 106b are power supply terminals for receiving the second operating voltage IS, the terminal 106c is a clock terminal for receiving the second clock signal CK2, and the terminal 106d is for receiving data. The terminal 106e is a receiving terminal for transmitting data, and the terminal 106e is a transmitting terminal for transmitting data. That is, in the IC card 104 of the eighth embodiment, the reader / writer 8 is provided with the terminal 106.
a to 106e, which is configured to receive power and transmit / receive data.

Then, the IC cards 90, 94, 100 of the fifth to eighth embodiments constructed as shown in FIGS.
Even with 104, the same effect as that of the IC card 2 of the first embodiment can be obtained. Next, the IC card of the ninth embodiment will be described with reference to FIG. Note that FIG. 19 is a block diagram showing the internal structure of the IC card 108 of the ninth embodiment.

As shown in FIG. 19, the IC card 108 of the ninth embodiment is the IC card 2 of the first embodiment shown in FIG.
To the rechargeable battery 110, the diode 46,
A charging circuit 112 for charging the battery 110 with the operating voltage Vcc of the CPU 30 output from the battery 48;
And a diode 114 for supplying the output voltage of the above to the inside of the custom IC 12 are additionally provided.

Further, in this IC card 108, the diode 116 connected in the forward direction and in series to the voltage supply line from the diode 16 to the power control section 36, the oscillator 38, and the reception amplifier 40 is provided inside the custom IC 12. A switch S for opening and closing the cathode side of the diode 116 and the voltage supply line from the diode 114, and a reference power source 118 for generating a predetermined reference voltage Vk smaller than the operation threshold Vth of the CPU 30.
And operates by receiving the voltage from the diode 114, compares the reference voltage Vk from the reference power source 118 with the detection voltage from the diode 16, and when the detection voltage is larger, the switch S is turned on. A comparator 120 for short-circuiting is additionally provided. In the ninth embodiment, the cathode side voltage of the diode 116 is used as the first operating voltage RS.

In the IC card 108 of the ninth embodiment having such a configuration, the IC card 108 receives the radio wave from the interrogator 6, and the detection voltage output from the diode 16 is higher than the reference voltage Vk. When it becomes larger, the switch S is short-circuited by the comparator 120. Then, from the battery 110, the diode 114 and the switch S
Since a voltage is supplied to the cathode side of the diode 116 via the power supply, the power control unit 36, the oscillator 38, the reception amplifier 40, and the CPU 30 start operating, and thus the communication operation with the interrogator 6 is started. Is started.

Then, the IC card 108 is the interrogator 6
When the detection voltage from the diode 16 becomes lower than the reference voltage Vk because the interrogator 6 stops transmitting radio waves, the switch S is opened and the operation of the IC card 108 is stopped. To do.

On the other hand, the battery 110 is the IC card 10 concerned.
8 is inserted into the reader / writer 8 or the IC
When the card 108 approaches the interrogator 6 and receives a strong radio wave, the operating voltage V output from the diodes 46 and 48
When cc becomes large, it is charged by the charging circuit 112.

Therefore, according to the IC card 108 of the ninth embodiment, as long as the detection voltage from the diode 16 becomes higher than the reference voltage Vk, the self operation can be started. Even if the distance to the interrogator 6 is large, wireless communication can be performed.
Moreover, since the battery 110 is charged when it is inserted into the reader / writer 8, it is not necessary to replace the battery.

Each of the IC cards of the above-described first to ninth embodiments was used as a credit card as well as being used in the entrance / exit management system for the door 4, but is configured as described above. The IC card of each embodiment can be used for various purposes such as a license, commuter pass, passport, employee ID, health insurance card, pension notebook, bank card, and medical chart.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating the configuration of the present invention.

FIG. 2 is a block diagram showing the internal configuration of the IC card of the first embodiment.

FIG. 3 is an external view of the IC card of the first embodiment.

FIG. 4 is an explanatory diagram illustrating a usage state when an IC card is used in a door entrance / exit management system.

FIG. 5 is an explanatory diagram illustrating a usage state when an IC card is used as a credit card.

FIG. 6 is an explanatory diagram illustrating a storage area of a memory built in an IC card.

FIG. 7 is an explanatory diagram showing a communication procedure between an IC card and an interrogator.

FIG. 8 is an explanatory diagram showing a communication procedure between an IC card and a reader / writer.

FIG. 9 is a flowchart showing overall processing executed by the CPU of the IC card.

FIG. 10 is a flowchart showing remote processing executed in the overall processing.

FIG. 11 is a flowchart showing an IC card process executed in the overall process.

FIG. 12 is an explanatory diagram illustrating a power control unit provided in the IC card according to the second embodiment.

FIG. 13 is an explanatory diagram illustrating a power control unit provided in the IC card according to the third embodiment.

FIG. 14 is an external view of an IC card according to a fourth embodiment.

FIG. 15 is a block diagram showing an internal configuration of an IC card of a fifth embodiment.

FIG. 16 is a block diagram showing the internal structure of an IC card of a sixth embodiment.

FIG. 17 is a block diagram showing the internal structure of an IC card of a seventh embodiment.

FIG. 18 is a block diagram showing the internal structure of an IC card of an eighth embodiment.

FIG. 19 is a block diagram showing the internal structure of an IC card of a ninth embodiment.

[Explanation of symbols]

2, 88, 90, 94, 100, 104, 108 ... IC
Card 6 ... Interrogator 8 ... Reader / Writer 10 ... Card main body 12 ... Custom IC 14 ... Power supply antenna 18
... transmission / reception antenna 22 ... power supply coil 24a, 24b ... reception electrostatic plate 26a, 26b ... transmission electrostatic plate 30 ... CPU
32 ... Memory 36, 66, 82 ... Power control unit 38 ... Oscillator
40 ... Receiving amplifier 42, 98 ... Clock amplifier 44, 102 ... Input / output section 50, 72, 74 ... Rise detector 52, 120 ... Comparator 68, 70 ... Voltage detector 90 ... Magnetic stripe
92 ... Antenna 96 ... Coil 106a-106e ... Terminal 110
… Battery 112… Charging circuit S… Switch

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location G06K 19/00 R

Claims (6)

[Claims] 1. A first communication interface for performing wireless communication with a first external device, and a second communication interface for performing mechanical contact with a second external device. A memory for storing response data to be output in response to a data request from each of the external devices; and a data request when the data request from the first external device is received by the first communication interface. Read response data from the memory and send the read response data to the first communication interface; and data from the second external device by the second communication interface. When the request is received, the response data corresponding to the data request is read from the memory, and the read response data is sent to the second communication interface. A second response control unit for transmitting the response, and an information storage card provided in one card, wherein the memory has a storage area for storing the response data divided into a plurality of areas in advance. Further, when the first response control means reads the response data from the memory, a storage area in the memory in which the first response control means can read the response data,
An information storage card, comprising: read limiting means for limiting only a predetermined specific storage area. 2. The information recording card according to claim 1, wherein the card is supplied with operating voltages from the first and second external devices via the first and second communication interfaces, respectively. Each operation of the first response control means, the second response control means, and the read limiting means is a first operation supplied from the first external device via the first communication interface. And a second operating voltage supplied from the second external device via the second communication interface, and is realized by processing of one CPU that operates by receiving a logical sum voltage. If the first operating voltage is larger than the second operating voltage when the logical sum voltage becomes equal to or higher than a predetermined value at which the CPU can operate, the first response is sent to the CPU. Control means and A first command signal for executing the process as the read limiting unit is output, and the first command signal is output.
Command voltage output means for outputting a second command signal for causing the CPU to execute the processing as the second response control means when the second operation voltage is higher than the operation voltage. An information storage card, comprising: the CPU configured to execute a process in response to the first command signal and the second command signal. 3. The information recording card according to claim 1, wherein the card is supplied with operating voltages from the first and second external devices via the first and second communication interfaces, respectively. Each operation of the first response control means, the second response control means, and the read limiting means is a first operation supplied from the first external device via the first communication interface. And a second operating voltage supplied from the second external device via the second communication interface, and is realized by processing of one CPU that operates by receiving a logical sum voltage. When the first operating voltage becomes equal to or higher than a predetermined set value, the CPU outputs a first command signal for causing the CPU to execute the process as the first response control unit and the read limiting unit, and the second Work of When the dynamic voltage becomes equal to or higher than a predetermined set value, a command signal output unit that outputs a second command signal for causing the CPU to execute the process as the second response control unit is provided. An information storage card, wherein the information storage card is configured to execute processing in response to the first command signal and the second command signal. 4. The information storage card according to claim 3, wherein the command signal output means, when both the first operating voltage and the second operating voltage are equal to or more than the set value, Of the first command signal and the second command signal,
An information storage card, which is configured to preferentially output any one of predetermined command signals. 5. The information storage card according to claim 3, wherein the command signal output means, when both the first operating voltage and the second operating voltage are equal to or more than the set value, Of the first command signal and the second command signal,
An information storage card, characterized in that it is configured to preferentially output the one corresponding to the operating voltage that has become equal to or higher than the preset value. 6. The information storage card according to claim 1, wherein a magnetic stripe for recording information is provided on the surface of the information storage card. Recording card.