JP3881683B2 - Compound IC card - Google Patents

Description

  The present invention relates to a composite IC card having a contact type and a non-contact type interface, and in particular, the reliability as a composite IC card is sufficiently ensured by preventing malfunction even when driven from either interface. The present invention relates to a composite IC card having a contact type and a non-contact type interface that is ensured in the above.

  Conventionally, an IC card having a contact type and a non-contact type interface as shown in Patent Document 1 is known.

  That is, the composite IC card disclosed in Patent Document 1 includes a memory and a CPU, an IC that generates a signal in response to an input from the outside, and an electrical contact for contacting and responding to an external device. This is a card provided with a mechanism and an antenna mechanism for responding by communication without contact with an external device.

  And this IC card can write and change the contents of the memory by an external device connected to the electrical contact mechanism. When responding by communication without contact with the external device, the specific information in the memory is modulated. And output from the antenna mechanism.

Patent Document 2 discloses a composite IC card having a built-in battery that is charged by a voltage supplied from a terminal device.
Japanese Examined Patent Publication No. 4-16831 JP 9-326021 A

  However, the problems to be solved in the above-described composite IC card are as follows.

  That is, in the composite IC card as described above, when it is driven via a non-contact antenna while being connected to an external device via an electrical contact mechanism and driven, or a non-contact type No measures are taken to prevent malfunction when driven from an external device via an electrical contact mechanism while being driven by an external device via an antenna, and the reliability as a composite IC card is not That is not enough.

  Therefore, the present invention has been made in consideration of the above circumstances, and in a composite IC card having a contact type and a non-contact type interface, it can be operated as a composite IC card by preventing malfunction even when driven from either interface. It is an object of the present invention to provide a composite IC card having a contact-type and non-contact-type interface that sufficiently secures reliability.

  The composite IC card according to the present invention has a contact interface and a non-contact interface, and has a control circuit selectively connected to the contact interface and the non-contact interface. It is intended for those that are selectively driven through an expression interface.

And a selective connection means for connecting to the control circuit by either one of the contact type interface and the non-contact type interface, a storage means for storing which of the contact type interface and the non-contact type interface is used, and a composite IC card During communication with the terminal device, a predetermined drive voltage is supplied to the control circuit from the contact type interface and a predetermined drive voltage is not supplied to the control circuit from the non-contact type interface, or non-contact Monitoring whether the predetermined driving voltage is supplied from the contact type interface to the control circuit and the predetermined driving voltage is not supplied from the contact type interface to the control circuit, and the monitoring result is stored in the storage means. Control to stop communication with the terminal device when the connection status changes It is obtained so as to include a stage.

  According to the above-described invention, it is possible to prevent malfunction even when driven from either a contact type or non-contact type interface, and it is possible to sufficiently ensure the reliability as a composite IC card.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

(First embodiment)
First, a first embodiment according to the present invention will be described with reference to FIGS.

  FIG. 1 shows a configuration of a wireless card system using a wireless combination card (hereinafter simply referred to as a wireless combination card) as a data storage medium applied as a composite IC card according to the present invention.

  As shown in FIG. 1, the wireless card system is a portable data storage medium having a wireless card reader / writer 200 as a data processing device and a portable communication function of both a contact type communication function and a wireless communication function. And the wireless combination card 300 of FIG.

  The wireless card reader / writer 200 performs reading to the wireless combination card 300, transmission of a write (storage) command, processing of read data, transmission of write data, etc. As shown in FIG. Mainly includes a modulation circuit 204, a transmission driver 203, a transmission antenna 201, a reception antenna 202, a reception amplifier 205, a demodulation circuit 206, an operation unit 209 such as a keyboard, a display unit 208, and a battery that supplies operation power to each unit. And the interface 211 connected to an external device (not shown).

  The wireless combination card 300 decodes commands from the wireless card reader / writer 200, writes data (stores), transmits data, and the like. As shown in FIG. A parallel tuning circuit (reception means) 301 including a tuning capacitor (not shown) and a tuning capacitor (not shown), a power generation unit (power generation means) 302, a demodulation circuit (demodulation means) 303, a control logic circuit (CPU) 305, a modulation circuit (Modulation means) 304, a non-volatile memory 306 including an EEPROM as a storage means, a clock generation circuit (clock generation means) 307, and the like.

  The wireless combination card 300 is used when a contact-type communication function described later is executed. As shown in FIG. 2, an outer surface serving as an electrical contact mechanism for contacting and responding to an external device. Are provided with eight electrical contacts C1 to C8.

  Hereinafter, the wireless card reader / writer 200 and the wireless combination card 300 will be described in more detail.

  First, reading of data from the wireless card reader / writer 200 to the wireless combination card 300 will be described.

  The control unit 207 of the wireless card reader / writer 200 generates a read command and sends it to the modulation circuit 204.

  The modulation circuit 204 modulates the command by an arbitrary modulation method and sends it to the driver 203 for transmission.

  The driver 203 amplifies the modulated signal to an intensity sufficient to radiate, and supplies the amplified signal to the transmission antenna 201.

  The signal supplied to the transmitting antenna 201 is radiated to the space and received by the parallel tuning circuit 301 of the wireless combination card 300.

  This received signal is demodulated by the demodulation circuit 303 and sent to the control logic circuit 305, where command analysis is performed.

  As a result, when it is decoded that the content of the command is read, the control logic circuit 305 reads predetermined data from the nonvolatile memory 306 in which card data is stored and sends it to the modulation circuit 304.

  The modulation circuit 304 modulates the card data and supplies it to the parallel tuning circuit 301.

  The signal supplied to the parallel tuning circuit 301 is radiated to the space and received by the receiving antenna 202 of the wireless card reader / writer 200.

  This received signal is sent to the receiving amplifier 205.

  The amplifier 205 amplifies the received signal and then sends it to the demodulation circuit 206 where it is demodulated.

  The demodulated signal is sent to the control unit 207 where predetermined data processing is performed.

  Note that data can be displayed on the display unit 208 as needed, and data can be input on the operation unit 209.

  Next, writing of data to the wireless combination card 300 in the wireless card reader / writer 200 will be described.

  The control unit 207 of the wireless card reader / writer 200 generates a write command and write data and sends it to the modulation circuit 204.

  The modulation circuit 204 modulates the command and data with an arbitrary modulation method and sends the modulated command and data to the transmission driver 203.

  The driver 203 amplifies the modulated signal to an intensity sufficient to radiate, and supplies the amplified signal to the transmission antenna 201.

  The signal supplied to the transmitting antenna 201 is radiated to the space and received by the parallel tuning circuit 301 of the wireless combination card 300.

  This received signal is demodulated by the demodulation circuit 303 and sent to the control logic circuit 305, where command analysis is performed.

  As a result, when it is decoded that the content of the command is writing, the control logic circuit 305 writes the write data sent after the write command to a predetermined address in the nonvolatile memory 306.

  The power generation unit 302 in the wireless combination card 300 generates power to be consumed in the wireless combination card 300 by branching and rectifying the received signal from the parallel tuning circuit 301.

  The clock generation circuit 307 in the wireless combination card 300 generates a clock necessary for operating each circuit based on the received signal from the parallel tuning circuit 301.

  The clock generated by the clock generation circuit 307 is output to the demodulation circuit 303, the modulation circuit 304, and the control logic circuit 305.

  As described above, the wireless card reader / writer 200 needs to place the transmitting antenna 201 and the receiving antenna 202 close to each other at a position opposite to the parallel tuning circuit 301 of the wireless combination card 300.

  A strong signal is radiated from the transmitting antenna 201 to the wireless combination card 300.

  The receiving system is highly sensitive because it needs to receive a weak signal from the wireless combination card 300.

  Next, a detailed configuration of the wireless combination card 300 will be described with reference to FIGS.

  As shown in FIGS. 2 and 3, the wireless combination card 300 has contact terminals C1 (VCC), C2 (RST), C3 (CLK), and C4 (reserved terminals for the future: on the card surface). RFU), C5 (GND), C6 (VPP: unused), C7 (I / O), C8 (reserved terminal for the future: RFU) are arranged as the contact interface 401.

  A one-chip microprocessor 310 as shown in FIGS. 2 and 3 is embedded in the card of the wireless combination card 300.

  As shown in FIG. 3, the one-chip microprocessor 310 includes a control CPU (central processing unit) 405 corresponding to the control logic circuit 305, a ROM 406 for storing a control program, and a password (for example, four digits). And a data memory 407 constituted by an EEPROM in which data is recorded, an interface circuit 408 constituted by a UART, a RAM 409 for temporary storage, a cipher circuit 402, and the like.

  In such contact-type data exchange using the wireless combination card 300, a voltage is supplied from the contact terminal C1 to the VCC (normally 5V) terminal from the terminal device in which the card 300 is inserted, and the contact terminal C3. , C2, and C5, signals are input to the CLK (clock) terminal, RST (reset) terminal, and GND (ground potential) terminal, and at the same time, the contact terminal C7 and the I / O port are connected to perform data communication.

  Each of the above parts is composed of an IC chip and is provided on one substrate.

  The terminals are connected to each other by wiring, and each terminal and the substrate on which the IC chip is mounted are integrated and handled as an IC module. Embedded in the card so that each terminal is exposed.

  Further, a parallel tuning circuit 301 is provided in the card 300 for exchanging data in a non-contact manner.

  In other words, the parallel tuning circuit 301 receives a two-phase phase modulated wave signal (first two-phase phase modulated wave signal) from the transmitting antenna 201 of the wireless card reader / writer 200, and has a carrier frequency of 2 at f0 / 2. Transmission is also performed using a phase-phase modulated wave signal (second two-phase phase-modulated wave signal), and is configured by a loop antenna coil 301a and a tuning 301b capacitor.

  In this parallel tuning circuit 301, the loop antenna coil 301a transmits at the same time as reception at the carrier frequency of f0 / 2. However, it is necessary to efficiently secure power for generating power from the received radio wave. For this reason, it is tuned to the carrier frequency f0 of the received two-phase modulated signal.

  The carrier frequency for the transmission may be 1 / integer instead of ½ the carrier frequency of the received two-phase modulated signal.

  The loop-shaped antenna coil 301a is merely for transmitting and receiving signals. These coils may be provided for both transmission and reception, but may be separately provided for transmission and reception. Good.

  The one-chip microprocessor 310 incorporates a non-contact interface circuit 400 for exchanging data via the parallel tuning circuit 301 for exchanging data in a non-contact manner.

  The non-contact interface circuit 400 includes a power generation unit 302 and a parallel tuning circuit 301 that generate power to be supplied to the entire circuit in the wireless combination card 300 based on the two-phase phase modulated wave signal from the parallel tuning circuit 301. Digital for causing the CPU 405 in the one-chip microprocessor 310 to read the analog signal received via the clock generation circuit (clock generation means) 307 that generates an operation clock from the analog signal received via the parallel tuning circuit 301 A demodulating circuit (demodulating means) 303 for converting the signal into a signal, and a modulating circuit (modulating means) for modulating the oscillation circuit output with a signal sent from the CPU 405 and transmitting it from the loop antenna (transmitting) coil 301a of the parallel tuning circuit 301 304, by a clock generation circuit (clock generation means) 307 It is constituted by a reset signal generating circuit 308 for generating a reset signal based on the generated clock.

  In the wireless combination card 300, a switch (SW1) 309 for turning on / off the conduction between the non-contact interface 400 and the loop antenna coil 301a of the parallel tuning circuit 301 is provided.

  This switch (SW1) 309 is normally ON (connected) in the initial state, but when the Vcc voltage is applied from the contact terminal C1 of the contact interface 401 to the VCC (normally 5V) terminal. The switch (SW1) 309 is turned off by the CPU 405.

  Further, in the first embodiment, in addition to the switch (SW1) 309, each of the contact terminals C1 (VCC), C2 (RST), C3 (CLK), and C7 (I / O) is supported. Then, switches (SW2, SW3, SW4, SW5) 312 to 315 are provided.

  One input terminal of each of these switches (SW2, SW3, SW4, SW5) 312 to 315 corresponds to each of the contact terminals C1 (VCC), C2 (RST), C3 (CLK), and C7 (I / O). Connected.

  The other input terminal of the switch (SW2) 312 is connected to the power generation unit 302 so that the Vcc voltage generated by the power generation unit 302 of the non-contact interface 400 is input.

  Here, one of the input terminals of the switch (SW2) 312 is selected to be enabled by the output of the selection circuit (sel) 320 controlled by the CPU 405.

  Note that the other input terminal of the switch (SW2) 312 is selected by the CPU 405 so that the Vcc voltage generated by the power generation unit 302 is input in the initial state.

  The other input terminal of the switch (SW3) 313 is connected to the reset signal generation circuit 308 so that the reset signal generated by the reset signal generation circuit 308 of the non-contact interface 400 is input.

  Here, one input terminal of the switch (SW3) 313 is selected to be enabled by the output of the selection circuit (sel) 320 controlled by the CPU 405.

  Note that the other input terminal of the switch (SW3) 313 is selected so that the reset signal generated by the reset signal generation circuit 308 is input by the CPU 405 in the initial state.

  The other input terminal of the switch (SW4) 314 is connected to the clock generation circuit 307 so that the clock signal generated by the clock generation circuit 307 of the non-contact interface 400 is input.

  Here, one of the input terminals of the switch (SW4) 314 is selected to be enabled by the output of the selection circuit (sel) 320 controlled by the CPU 405.

  Note that the other input terminal of the switch (SW4) 314 is selected so that the clock signal generated by the clock generation circuit 307 is input by the CPU 405 in the initial state.

  The other input terminal of the switch (SW5) 315 is connected to the demodulation circuit (demodulation means) 303 of the non-contact interface 400.

  One output terminal of the switch (SW5) 315 is connected to the modulation circuit (modulation means) 304 of the non-contact interface 400.

  Here, the switch (SW5) 315 is connected to the output terminal of the demodulation circuit (demodulation means) 303, the input terminal of the modulation circuit (modulation means) 304, or the contact terminal C7 according to the output of the selection circuit (sel) 320 controlled by the CPU 405. Either input terminal or output terminal is selected to be in an enable state so as to be selectively connected to (I / O).

  Note that the switch (SW5) 315 is connected to the CPU 405 by selecting the output terminal of the demodulation circuit (demodulation means) 303 and the input terminal of the modulation circuit (modulation means) 304 in the initial state.

  On the other hand, the contact terminal C1 of the contact type interface 401 and the output of the power generation unit 302 are respectively input to the terminals A and B of the CPU 405. When the wireless combination card 300 is activated and performs an initialization operation, the CPU 405 Whether it is driven by the contact type interface 401 or the non-contact type interface 400 is discriminated.

  The CPU 405 reads out a program for performing the initialization operation stored in the ROM 406 and performs the initialization operation.

  Next, the operation of the wireless combination card having such a configuration will be described with reference to the flowchart shown in FIG.

  For example, when the card 300 is inserted into the terminal device, a VCC (normally 5 V) voltage is applied from the contact terminal C1 of the contact interface 401 of the card 300 (ST1).

  Here, when the Vcc voltage is applied from the contact terminal C1 to the VCC (normally 5V) terminal, the selection circuit (sel) 320 of the card 300 causes the contact terminals C1 (VCC), C2 (RST), C3 (CLK), A selection signal “1” is output to each of the switches (SW2, SW3, SW4, SW5) 312 to 315 so as to select and connect each of C7 (I / O) (ST101).

  Thereafter, when a clock signal and a reset signal are respectively supplied from the CLK terminal C3 and the RST terminal C2 (ST2, ST2), the CPU 405 starts an initialization operation (ST102).

  During this initialization operation, the CPU 405 checks the status of the input terminals A and B, and whether the wireless combination card 300 is activated by the contact interface 401 or the non-contact interface 400 in the CPU 405. Is discriminated (ST103).

  That is, the state determination when the input terminal A is “1” and the input terminal B is “0” is activated by the non-contact interface 400.

  The state determination when the input terminal A is “0” and the input terminal B is “1” is activated by the contact interface 401.

  Then, when the input terminal A is “0”, the input terminal B is “0”, or the input terminal A is “1” and the input terminal B is “1”, an error occurs.

  If there is an error, the CPU 405 stops operating.

  In this case, it is activated by the contact type interface 401, and the CPU 405 holds the state of the input terminals A and B in a predetermined area of the RAM 409 (ST104).

  In the case of activation by the non-contact type interface 400, (1,0) is stored in a predetermined area of the RAM 409, and in the case of activation by the contact type interface 401, (0, 1) is stored in a predetermined area of the RAM 409. . As a result, storage means for storing which of the contact interface 401 and the non-contact interface 400 is connected is configured.

  Next, based on the information stored in the RAM 409, the CPU 405 determines whether the card 300 is activated by the contact interface 401, that is, whether the pattern stored in the RAM 409 is (0, 1). A determination is made (ST105).

  When activated by the contact interface 401 and the pattern of the predetermined area of the RAM 409 is (0, 1), the CPU 405 outputs a selection signal for turning off the switch (SW1) 309 (ST106).

  The switch (SW1) 309 is turned OFF by this selection signal.

  This selection signal is also supplied to the selection circuit (sel) 320, and the switches (SW2, SW3, SW4, SW5) 312 to 315 are connected to the contact terminals C1 (VCC), C2 (RST), C3 (CLK), The selection circuit (sel) 320 is controlled to maintain the selected state of each of C7 (I / O) (ST106).

  By the selection of the selection circuit (sel) 320, each of the switches (SW2, SW3, SW4, SW5) 312 to 315 becomes contact terminals C1 (VCC), C2 (RST), C3 (CLK), and C7 (I / O). Each of these is maintained in a selected state. Thereafter, a command is received from the terminal device via the I / O port, and contact-type data exchange is performed via the I / O port according to the command.

  That is, while the contact type data exchange is being performed, the switch (SW1) 309 is turned off, and each of the switches (SW2, SW3, SW4, SW5) 312 to 315 is connected to the contact terminal C1 ( VCC), C2 (RST), C3 (CLK), and C7 (I / O) are selected, so that the data is exchanged by the contact method or driven by the contact method. During this time, even if the receiving antenna coil 301a of the parallel tuning circuit 301 receives any radio wave, the wireless combination card 300 does not malfunction, and the contact type drive or the contact type data exchange is ensured. The

  On the other hand, when activated by the non-contact type interface 400, the switch (SW1) 309 is normally ON (connected), so that radio waves are received by the receiving antenna coil 301a of the parallel tuning circuit 301 (ST201). The power generation unit 302, clock generation circuit (clock generation unit) 307, demodulation circuit (demodulation unit) 303, modulation circuit (modulation unit) 304, and reset signal generation circuit operate (ST202).

  When a voltage is applied from the power generation unit 302, the selection circuit (sel) 320 outputs a selection signal “0” (ST202).

  Each of the switches (SW2, SW3, SW4, SW5) 312 to 315 in the initial state includes a power generation unit 302, a clock generation circuit (clock generation unit) 307, a demodulation circuit (demodulation unit) 303, a modulation circuit (modulation unit) 304, Each of the reset signal generation circuits 308 is selected and connected, and the selection signal “0” does not change the state of each switch (SW2, SW3, SW4, SW5) 312 to 315.

  Thereafter, a clock signal and a reset signal are supplied from the clock generation circuit (clock generation means) 307 and the reset signal generation circuit 308, respectively, so that the CPU 405 starts an initialization operation (ST102).

  During this initialization operation, the CPU 405 checks the state of the input terminals A and B, and whether the wireless combination card 300 is activated by the contact interface 401 or the non-contact interface 400 in the CPU 405. Is discriminated (ST103).

  In this case, the CPU 405 is activated by the non-contact interface 400, and the CPU 405 stores the state of the input terminals A and B as (1, 0) in a predetermined area of the RAM 409 (ST103).

  Next, the CPU 405 determines from the information stored in the RAM 409 whether the card 300 is activated by the contact-type interface 401 or the non-contact-type interface 400 (ST105, ST107).

  When activated by the non-contact interface 400 and it is determined that the pattern of the predetermined area of the RAM 409 is (1, 0) (ST106), the CPU 405 determines the selection circuit (sel) 320 and the switch (SW1) 309. The selection signal “0” is output (ST108).

  This selection signal “0” holds each switch in the initial state.

  Thereafter, each of the switches (SW2, SW3, SW4, SW5) 312 to 315 includes a power generation unit 302, a clock generation circuit (clock generation unit) 307, a demodulation circuit (demodulation unit) 303, a modulation circuit (modulation unit) 304, and a reset. Each of the signal generation circuits 308 is selected and connected, and the non-contact interface 400 is connected.

  Through the above steps ST102 to ST108, the initialization operation by the CPU 405 is completed.

  In addition, as an initialization operation, hardware check of ROM 406, RAM 409, EEPROM 407, etc. is performed.

  When the initialization operation is completed, the card 300 can exchange data with the outside.

  When the card 300 is driven by the contact-type interface 401, the external device (reader / writer) applies the signal to the contact terminal C2 after 40,000 clocks have elapsed since the clock supply to the contact terminal C3 is started. The reset signal is canceled.

  Similarly, the reset signal generation circuit 308 is configured to cancel the reset signal after a predetermined number of clocks have elapsed after the clock generation circuit 307 starts supplying the clock.

  Then, when the reset signal applied to the contact terminal C2 is released or the reset signal from the reset signal generation circuit 308 is released, the CPU 405 is selected from the contact interface 401 and the non-contact interface 400. The initial response signal (ATR) is output to the external device (reader / writer) through the other.

  When the external device (reader / writer) receives the initial response signal (ATR) from the card 300, the command can be transmitted to and received from the card 300, and the command is transmitted to the card 300.

  Card 300 receives a command via the currently selected one of contact-type interface 401 and non-contact-type interface 400 (ST110).

  When receiving the command, the CPU 405 determines the state of the input terminals A and B, and compares it with the pattern (initial state) stored in the RAM 409 (ST111).

  When it is confirmed that the states of the input terminals A and B and the pattern (initial state) stored in the RAM 409 are the same (ST112), the CPU 405 executes the received command and outputs the processing result to the outside. (ST113).

  Thereafter, similarly, commands and data are transmitted / received to / from the external device.

  If no illegal attempts or abnormalities have occurred from the outside, the state of the input terminals A and B and the pattern (initial state) stored in the RAM 409 must be the same. If it is confirmed that the states of the terminals A and B and the pattern (initial state) stored in the RAM 409 are not the same, the CPU 405 outputs an error and stops the operation (ST114).

  The signal received through the receiving antenna coil 301a of the parallel tuning circuit 301 is converted into a digital signal by the demodulating circuit (demodulating means) 303 and taken into the CPU 405 through the UART (I / O) 408 to appropriately perform signal processing. Then, it is stored in the RAM 409 or the like as necessary.

  A signal to be transmitted to the terminal side is output from the UART (I / O) 408 to the modulation circuit 304, and the output of the clock generation circuit 307 is modulated and transmitted through the antenna coil of the parallel tuning circuit 301.

  Thus, non-contact type data exchange is performed.

  In this embodiment, the CPU 405 checks the state of the input terminals A and B at the time of initialization, and the wireless combination card 300 is activated by the contact interface 401 in the CPU 405 or activated by the non-contact interface 400. It is determined whether or not the data has been stored, and the result is stored in the RAM 409.

  Then, it is possible to determine whether or not the state has changed by monitoring the state of the input terminals A and B during information exchange with the terminal device and comparing the state with the pattern held in the RAM 409.

  The CPU 405 monitors the state of the input terminals A and B. If the pattern is the same as the pattern held in the RAM 409, the CPU 405 assumes a normal state and no problem, but holds the state of the input terminals A and B in the RAM 409. If the pattern is different, it is expected that some abnormal state has occurred. Therefore, an error response is output to the terminal device, and the operation of the CPU 405 can be stopped.

  In addition, in a state where each of the switches (SW2, SW3, SW4, SW5) 312 to 315 is in an initial state, each of the contact terminals C1 (VCC), C2 (RST), C3 (CLK), and C7 (I / O) is selected. In this case, the same operation can be performed by using the inverted output signal of the selection circuit (sel) 320 as the selection signal as shown in FIG.

  Therefore, according to the first embodiment as described above, the contact-type interface 400 has the prohibition means for prohibiting the operation of the non-contact-type interface 400 while being driven through the contact-type interface 401. No malfunction occurs even if radio waves are emitted in the vicinity while information is exchanged via the interface 401.

  Further, according to the first embodiment as described above, the contactless interface 400 and the antenna coil 301a of the parallel tuning circuit 301 are configured to be disconnected from each other. Even if radio waves are radiated in the vicinity while information is being exchanged, they will not be received and will not malfunction.

  Further, according to the first embodiment as described above, the non-contact type interface 400 of the microprocessor 310 is operated by the output of the parallel tuning circuit 301, the power generation unit 302, the clock generation circuit (clock generation means) 307, It has a demodulation circuit (demodulation means) 303, a modulation circuit (modulation means) 304, a reset signal generation circuit 308, a switch 309 for turning on / off the non-contact interface 400 and the parallel tuning circuit 301, and a contact type When the Vcc voltage is applied through the interface 401, the switch 309 is turned off, so that radio waves are radiated in the surroundings while information is exchanged through the contact interface. However, the non-contact interface 400 does not operate at all and does not malfunction.

(Second Embodiment)
Next, a second embodiment of the present invention will be described with reference to FIG.

  In the second embodiment, the configuration of FIG. 1 and FIG. 2 described above is the same, the configuration in the wireless combination card 300 is partially different from that of FIG. 3, and the description of the same portion is omitted. .

  In the wireless combination card 300, a switch (SW1) 309a for turning on / off the conduction between the non-contact interface 400 and the antenna coil (parallel tuning circuit 301) is provided.

  This switch (SW1) 309a is normally in a 0N (connected) state, but when the Vcc voltage is applied from the contact terminal C1 of the contact interface 401 to the VCC (normally 5V) terminal, this switch (SW1) 309a (SW1) 309a is configured to be OFF.

  Further, in the second embodiment, in addition to the switch (SW1) 309a, the power generation unit 302, the clock generation circuit (clock generation unit) 307, and the demodulation circuit (demodulation unit) 303 of the non-contact interface 400. The switches (SW6, SW7, SW8, SW9, SW10) 316a to 320a are provided corresponding to the modulation circuit (modulation means) 304 and the reset signal generation circuit 308, respectively.

  These switches (SW6, SW7, SW8, SW9, SW10) 316a to 320a are normally in a 0N (connected) state, but the Vcc voltage is applied from the contact terminal C1 of the contact interface 401 to the VCC (normally 5V) terminal. When applied, these switches (SW6, SW7, SW8, SW9, SW10) 316a to 320a are turned off.

  These switches (SW 6, SW 7, SW 8, SW 9, SW 10) 316 a to 320 a prohibit input / output of signals through the non-contact interface 400.

  That is, by providing these switches (SW6, SW7, SW8, SW9, SW10) 316a to 320a, contactless data exchange is performed or contactless driving is performed. It is possible to completely inhibit the input / output of signals through the expression interface 400 and prevent malfunction.

  Further, in the second embodiment, the switches (SW2, SW3) corresponding to the contact terminals C1 (VCC), C2 (RST), C3 (CLK), and C7 (I / O) of the contact interface 401, respectively. , SW4, SW5) 312a to 315a.

  These switches (SW2, SW3, SW4, SW5) 312a to 315a are normally ON (connected) bears, but when the Vcc voltage is applied from the power generation unit 302 of the non-contact interface 400. Are configured to turn off these switches (SW2, SW3, SW4, SW5) 312a to 315a.

  These switches (SW 2, SW 3, SW 4, SW 5) 312 a to 315 a prohibit input / output of signals through the contact type interface (contact terminal) 401.

  In other words, by providing these switches (SW2, SW3, SW4, SW5) 312a to 315a, a contact type while data is exchanged in a non-contact manner or is driven in a non-contact manner. Input / output of signals through the interface 401 is completely prohibited, and malfunction can be prevented.

  Therefore, according to the second embodiment as described above, since the operation prohibiting means for prohibiting the operation of the non-contact interface 400 is provided while being driven through the contact interface 401, While information is being exchanged via the contact interface 401, no malfunction occurs even if radio waves are radiated around.

  Further, according to the present invention as described above, it is configured to include means for cutting off the conduction between the non-contact type interface 401 and the antenna coil (parallel tuning circuit) while being driven through the contact type interface 401. Therefore, while information is being exchanged via the contact-type interface 401, even if radio waves are radiated in the surroundings, they are not received and do not malfunction.

  Further, according to the present invention as described above, the non-contact interface 400 of the microprocessor includes the power generation unit 302 that operates according to the output of the parallel tuning circuit 301, the clock generation circuit (clock generation unit) 307, the demodulation circuit (demodulation unit). ) 303, a modulation circuit (modulation means) 304, and a reset signal generation circuit 308, a switch for turning ON / OFF conduction between the non-contact type interface 400 and the parallel tuning circuit 301, and via the contact type interface 401 When the Vcc voltage is applied, the switch is turned off. Even if radio waves are radiated in the surroundings while information is exchanged via the contact interface 401, the switch is turned off. The contact interface 400 does not operate at all and does not malfunction.

  Note that the present invention is not limited to the above-described embodiments as they are, and can be embodied by variously modifying the constituent elements without departing from the scope of the invention in the implementation stage. Various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the above-described embodiments. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, constituent elements according to different embodiments may be appropriately combined.

1 is a block diagram showing a configuration of a wireless card system using a wireless combination card (wireless combination card) as a data storage medium applied as a composite IC card according to the present invention. Eight electrical contacts C1 to C8 that are exposed on the outer surface serving as an electrical contact mechanism for the wireless combination card to contact and respond to an external device, and a one-chip micro embedded in the card FIG. 1 is a block diagram showing a configuration of a one-chip microprocessor 310 embedded in a wireless combination card 300 applied as a first embodiment of the present invention. FIG. The flowchart for demonstrating operation | movement of the wireless card system using the wireless combination card (wireless combination card) as a data storage medium applied as a compound IC card by this invention. The block diagram which shows the structure of the 1-chip microprocessor 310 embedded in the card | curd of the radio | wireless combination card 300 applied as a modification of 1st Embodiment of this invention. The block diagram which shows the structure of the 1-chip microprocessor 310 embedded in the card | curd of the radio | wireless combination card 300 applied as 2nd Embodiment of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 200 ... Wireless card reader / writer, 300 ... Wireless combination card (wireless combination card, compound IC card), 207 ... Control unit, 204 ... Modulation circuit, 203 ... Driver for transmission, 201 ... Transmission antenna, 202 ... Reception antenna, 205 ... receiving amplifier, 206 ... demodulating circuit, 209 ... operation unit, 208 ... display unit, 210 ... power supply unit, 211 ... interface, 301 ... parallel tuning circuit (receiving means), 301a ... loop antenna coil, 301b ... Tuning capacitor 302... Power generation unit (power generation unit) 303. Demodulation circuit (demodulation unit) 305 Control logic circuit (CPU) 304. Modulation circuit (modulation unit) 306 Non-volatile memory 307 Clock Generation circuit (clock generation means), C1 to C8 ... electrical contacts, 310 ... 1 chip microphone Processor, 320 ... Selection circuit (sel), 402 ... Cryptographic circuit, 405 ... CPU (Central Processing Unit), 406 ... ROM, 407 ... Data memory, 408 ... Interface circuit, 409 ... RAM, 400 ... Non-contact interface circuit 309 ... switch (SW, prohibiting means), 401 ... contact interface, 309a ... switch (SW1, prohibiting means), 312 to 315, 312a to 315a ... switch (SW2, SW3, SW4, SW5, prohibiting means), 316a ˜320a... Switch (SW6, SW7, SW8, SW9, SW10, prohibiting means).

Claims (3)

A contact interface and a non-contact interface; and a control circuit selectively connected to the contact interface and the non-contact interface; selectively via the contact interface or the non-contact interface In a composite IC card driven by
Selective connection means for connecting to the control circuit by either one of the contact interface and the non-contact interface;
Storage means for storing which of the contact type interface and the non-contact type interface is connected;
While the composite IC card is communicating with a terminal device, a predetermined drive voltage is supplied from the contact interface to the control circuit, and a predetermined drive voltage is supplied from the non-contact interface to the control circuit. Monitoring whether a predetermined drive voltage is supplied from the non-contact interface to the control circuit and a predetermined drive voltage is not supplied from the contact interface to the control circuit. And a control means for stopping communication with the terminal device when the monitoring result is changed from the connection state stored in the storage means,
A composite IC card characterized by comprising: The storage means is in a first state in which a predetermined drive voltage is supplied from the contact interface to the control circuit, and a predetermined drive voltage is not supplied from the non-contact interface to the control circuit. A signal indicating that the contact type interface is activated is stored, a predetermined drive voltage is supplied from the non-contact type interface to the control circuit, and a predetermined drive is supplied from the contact type interface to the control circuit. Storing a signal indicating activation by the non-contact interface in a second state in which no voltage is supplied ;
The control means monitors whether the state is the first state or the second state, and when the monitoring result changes from the state indicated by the signal stored in the storage means, the terminal 2. The composite IC card according to claim 1, wherein communication with the device is stopped. Wherein when the first state, while maintaining the state of connecting the contacting interface by said selective connection means to the control circuit, the inhibition state signal input and output via the noncontacting interface, the when in the second state, the non-contact interface according to the selective connection means together to maintain the state of the connection to the control circuit, the holding means for the inhibition state signal input and output via the contacting interface The composite IC card according to claim 2 , further comprising:

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