JP2005284900A - Ic card device with communication function - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To achieve a non-contact communication function by using a contact IC card. <P>SOLUTION: A main circuit of a mobile phone is connected to a terminal 7a for external connection, and an antenna for non-contact communication is connected to an antenna terminal 18. A switching circuit 10 switches a contact IC card to the side of the main circuit and the side of a contact IC card control circuit 11. When no waves are received by the antenna, the contact IC card 4 is connected to the side of the main circuit, and the contact IC card 4 can be controlled from the main circuit side and can be used as a contact type IC card. When a carrier wave is received by the antenna, the switching circuit 10 switches the contact IC card 4 to the side of the contact IC card control circuit 11, and it is possible to perform non-contact communication through a transmission/reception circuit 12, an RF detection/modulation circuit 14, etc. by using the contact IC card 4. Thus the contact IC card 4 can be used as a non-contact IC card. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an IC card device with a communication function for controlling an IC card mounted on a terminal such as a mobile phone.

  The non-contact IC card has an advantage that data recorded therein can not be easily read. For this reason, for example, a system for recording and using electronic money information has appeared on the non-contact IC card. Yes. As an example, a system that uses the function of a non-contact IC card in a mobile phone has been proposed (see, for example, Patent Document 1).

This uses a non-contact communication function of a non-contact IC card to make a terminal such as a mobile phone function as a non-contact IC card. When a new IC card function is mounted on such a terminal, an IC card having a non-contact communication function is mounted.
JP 2003-36427 A

  By the way, some conventional mobile phones are equipped with an IC card (contact IC card) having a contact communication function, and such contact IC cards have security information such as a telephone number for ensuring security. It has been stored. For this reason, in order to provide such a mobile phone with a non-contact communication function, it is necessary to mount a non-contact IC card in addition to the contact IC card, and information can be written and stored and read out. There is a problem that a plurality of IC cards having essentially the same function as possible must be mounted, and a mechanism for that purpose is required, resulting in an increase in the cost of the mobile phone.

  An object of the present invention is to provide an IC card device with a communication function that can solve such a problem and can realize a non-contact communication function using a contact IC card.

  In order to achieve the above object, the present invention is an IC card device that carries a contact communication between a main circuit and a contact IC card by mounting a contact IC card and controlling the contact IC card from the main circuit. Switching for switching between a contactless communication antenna for contactless communication, a processing means for processing a received signal of the contactless communication antenna, and a connection of the contact IC card to the main circuit and a connection to the processing means When the non-contact communication is performed by the non-contact communication antenna, the switching unit selects the processing unit and connects the processing unit to the contact IC card.

  A power generation unit configured to generate a power supply voltage based on a received signal from the non-contact antenna; and a detection unit configured to detect that the power generation unit generates a power supply voltage. When the generation of the voltage is detected, the connection to the contact IC card is switched to the processing means side.

  Further, when the power supply voltage is supplied from the main circuit, the power supply voltage is supplied to the contact IC card. When the power supply voltage is not supplied from the main circuit and the power supply voltage is supplied from the power supply generation means, the power supply voltage is supplied. Power supply switching means for supplying to the contact IC card is provided.

  Furthermore, the protocol differs between contact communication and non-contact communication, and the processing procedure in the contact IC card is changed according to the switching by the switching means between the main circuit connected to the contact IC card and the processing means. According to the procedure.

  Further, the processing means has a control means for controlling the contact IC card. When the contact IC card is connected to the main circuit by the switching means, the contact IC card is controlled by the main circuit, and the contact IC card is controlled by the switching means. Is connected to the processing means, it is controlled by the control means.

  Furthermore, a power generation unit that generates a power supply voltage based on a received signal from the non-contact antenna and a detection unit that detects that the power generation unit generates a power supply voltage are provided, and the processing unit controls the switching unit. The switching control means controls the switching means to switch the connection to the contact IC card to the processing means side when detecting the generation of the power supply voltage by the power generation means.

  In addition, the present invention includes a power generation unit that generates a power supply voltage based on a received signal from a non-contact antenna, a detection unit that detects that the power generation unit generates a power supply voltage, and the processing unit includes: A switching control means is provided for controlling the switching means, and the switching control means controls the switching means to switch the connection to the contact IC card to the processing means side when detecting the generation of the power supply voltage by the power generation means. .

  Further, when the power supply voltage is supplied from the main circuit, the power supply voltage is supplied to the contact IC card. When the power supply voltage is not supplied from the main circuit and the power supply voltage is supplied from the power supply generation means, the power supply voltage is supplied. Power supply switching means for supplying to the contact IC card is provided.

  Further, the contact communication and the non-contact communication have different protocols, and the processing means converts the received signal based on the non-contact communication protocol of the non-contact communication antenna into a signal based on the contact communication protocol to convert the contact IC into a contact IC. It has protocol conversion means for supplying a signal to the card, converting the signal into a non-contact communication protocol by a contact communication protocol from the contact IC card, and transmitting the signal from the non-contact communication antenna.

  Further, when the contact IC card is connected to the main circuit side by the switching means, a clock for the contact IC card is generated based on the clock supplied from the main circuit, and the contact IC card is moved to the processing means side by the switching means. When connected, a clock for a contact IC card is generated based on a signal received by a non-contact communication antenna.

  Further, the switching means can be prohibited from changing the connection state between the contact IC card and the main circuit to the connection state between the contact IC card and the processing means by a command from the main circuit to the switching means.

  According to the present invention, by mounting a contact IC card on a mobile terminal, the mobile terminal can be used as a contact IC card, or can be used as a non-contact IC card. It is possible to obtain both contact type and non-contact type IC card functions only by using a contact IC card.

  According to the present invention, contact communication and non-contact communication can be performed using an IC card compliant with a conventionally used protocol.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a block diagram showing a first embodiment of an IC card device with a communication function according to the present invention, wherein 1 is a mobile phone, 2 is a main circuit of the mobile phone, 3 is a companion chip, 4 is a contact IC card, Reference numeral 5 is a non-contact communication antenna, 6 is a tuning capacitor, 7 is a main circuit terminal, and 8 is an IC card terminal.

  In the figure, the mobile phone 1 is equipped with a contact IC card 4 and a companion chip 3 to which a non-contact communication antenna 5 is connected. A tuning capacitor 5 for adjusting the resonance frequency is connected to the non-contact communication antenna 5 in parallel. The companion chip 3 is provided with a main circuit terminal 7 and an IC card terminal 8, and the main circuit terminal 7 allows the main circuit 2 of the mobile phone 1 to be connected to the companion chip 3. A contact IC card 4 mounted on the mobile phone 1 is connected to the combination chip 3.

  2 is a block diagram showing a specific example of the companion chip 3 in FIG. 1, in which 7a is an external connection terminal, 7b is a non-contact power supply detection terminal, 7c is an external connection BUSY (busy) terminal, and 7d is an external connection. Switching prohibition terminal, 10 is a switching circuit, 11 is a contact IC card control circuit, 12 is a transmission / reception circuit, 13 is a data buffer, 14 is an RF (radio frequency) detection / modulation circuit, 15 is a power generation circuit, 16 is a power switching Reference numeral 17 denotes a clock generation circuit, 18 denotes an antenna terminal, and parts corresponding to those in FIG.

  In the figure, the companion chip 3 is provided with an external connection terminal 7a, a non-contact power source detection terminal 7b, an external connection BUSY terminal 7c, and an external connection switching prohibition terminal 7d. These terminals 7a to 7d are The main circuit terminal 7 in FIG. 1 is formed and connected to the main circuit 2 (FIG. 1). The antenna terminal 18 is connected to the non-contact communication antenna 5 (FIG. 1).

  In the companion chip 3, the RST (reset) terminal, the CLK (clock) terminal, and the IO (input / output) terminal of the external connection terminal 7 a are connected to the switching circuit 10, and the power supply terminal is connected to the power supply switching circuit 16. The GND (ground) terminal is grounded. The non-contact power source detection terminal 7b is connected to the power source switching circuit 7b, and the external connection BUSY terminal 7c and the external connection switching prohibition terminal 7d are connected to the switching circuit 10. The companion chip 3 is supplied with a clock, a reset pulse, and a power supply voltage from the main circuit 2 through an external connection terminal 7 a, and exchanges data with the main circuit 2.

  The switching circuit 10 is also connected to the contact IC card 4 by an IC card terminal 8. The IC card terminal 8 includes a terminal connected to the power supply terminal of the contact IC card 4, a terminal connected to the RST terminal, a terminal connected to the CLK terminal, a terminal connected to the IO terminal, and a GND. It consists of a terminal connected to the terminal and a terminal connected to the expansion IO. The IC card terminal 8 supplies a power supply voltage, a reset pulse, and a clock from the switching circuit 10 to the contact IC card 4, and data is exchanged between the switching circuit 10 and the contact IC card 4. 4 is grounded. The additional IO terminal of the contact IC card 4 is for exchanging data between the switching circuit 10 and the contact IC card 4 using a protocol different from that of the IO terminal.

  The contactless communication antenna 5 (FIG. 1) is connected to the RF detection / modulation circuit 14 by an antenna terminal 18. This RF detection / modulation circuit 14 RF-modulates data for non-contact communication and supplies it to the non-contact communication antenna 5, detects an RF signal received by the non-contact communication antenna 5, and supplies it to the transmission / reception circuit 12. To do. When the high-frequency RF signal is received by the non-contact communication antenna 5, a part of the power generation circuit 15 is supplied from the RF detection modulation circuit 14, and generates a power supply voltage based on this RF signal. The power supply voltage generated by the power supply generation circuit 15 is supplied to the contact IC card control circuit 11 and the transmission / reception circuit via the power supply switching circuit 16, and further via the switching circuit 10 and the IC card terminal 8. Can be supplied to the contact IC card 4. The power supply voltage is also supplied from the main circuit 2 (FIG. 1) via the external connection terminal 7a to the contact IC card control circuit 11 and the transmission / reception circuit via the power supply switching circuit 16 in the same manner as described above. The contact IC card 4 can be supplied via the circuit 10 and the IC card terminal 8. The power supply switching circuit 16 has a function of determining (detecting) whether the power supply voltage is supplied from the external connection 7 a or the power supply generation circuit 15, and the power supply voltage is supplied from the power supply generation circuit 15. When this is detected, information for notifying this is sent to the main circuit 2 from the non-contact power source detection terminal 7b, and the switching circuit 10 is also notified.

  The contact IC card 4 is controlled from the main circuit 2 via the external connection terminal 7a, the switching circuit 10 and the IC card terminal 8, but when the contactless communication antenna 5 performs the contactless communication, the switching circuit 10 The contact IC card control circuit 11 controls the IC card via the IC card terminal 8. When the contact IC card 4 is controlled by the main circuit 2, the additional IO terminal of the contact IC card 4 is set to “L (low level)”, and is controlled according to the communication control procedure of the contact IC card of the ISO7816 specification. When controlled by the contact IC card control circuit 11 during non-contact communication, the additional IO terminal of the contact IC card 4 is set to “H (high level)” and controlled according to the procedure of the ISO 14443 specification.

  According to this configuration, when the switching circuit 10 selects the external connection terminal 7a and the contact IC card 4 is connected to the main circuit 2, contact communication is performed between them, and the switching circuit 10 is connected to the contact IC card control circuit. When the contact 11 card is selected and the contact IC card 4 is connected to the contact IC card control circuit 11, the contactless communication antenna 5 can perform contactless communication. The contact communication and non-contact communication have different protocols. In the case of contact communication, as described above, it conforms to the ISO7816 specification defined for contact IC cards. In the case of non-contact communication, it conforms to the ISO14443 specification defined for non-contact type IC cards.

  Next, the operation of the companion chip 3 shown in FIG. 2 will be described. First, the operation when the contact IC card 4 is controlled from the main circuit 2 will be described.

  In this case, in order to activate the companion chip 3, the main circuit 2 follows the communication control procedure of the contact type IC card of the ISO7816 specification to the power supply terminal, the CLK terminal, the RST terminal and the IO terminal of the external connection terminal 7a. Supply the signal. In the companion chip 3, the switching circuit 10 switches to the contact IC card 4 side when the power switching circuit 16 notifies that the power generation circuit 15 does not supply power to the power switching circuit 16. Enables data communication with the contact IC card 4. The switching timing of the switching circuit 10 is the time when the power supply voltage is supplied to the power supply terminal of the external connection terminal 7a. When this is notified from the power supply switching circuit 16, the switching circuit 10 performs the above switching operation. Do.

  By this switching operation of the switching circuit 10, the RST terminal, the CLK terminal and the IO terminal of the external connection terminal 7a are connected to the RST terminal, the CLK terminal and the IO terminal of the IC card 4, respectively. Further, in the case of such control from the main circuit 2, the switching circuit 10 sets the additional IO terminal of the contact IC card 4 to “L” and switches the external IC terminal to the contact IC card 4 along with the switching. 7a, therefore, the fact that the main circuit 2 has been connected is notified.

  Thereafter, the CLK terminal, the IO terminal, and the RST terminal of the contact IC card 4 are processed according to the procedure according to the ISO7816 specification. In IC card 4, since the additional IO terminal is in the “L” state, it detects that activation processing according to the ISO7816 specification has started, and in response to this, performs ATR (Anser to Reset) according to the ISO7816 specification. Send out and start processing as a contact IC card.

  When acquiring the ATR from the IC card 4, the switching circuit 10 outputs the ATR from the external connection terminal 7a to the main circuit 2. Upon receiving this ATR, the main circuit 2 outputs command data according to the ISO7816 specification to the IO terminal of the external connection terminal 7a of the companion chip 3. This command data is supplied to the IC card 4 from the IO terminal via the switching circuit 10. The IC card 4 processes the command data input from the IO terminal and outputs the response data from the IO terminal as response data according to the ISO7816 specification. This response data is returned to the main circuit 2 via the switching circuit 10 and the IO terminal of the external connection terminal 7a.

  In this way, when the main circuit 2 finishes the necessary processing, the main circuit 2 performs the deactivation processing for cutting off the power supply according to the procedure according to the ISO7816 specification. Accordingly, the RST terminal, the CLK terminal, and the IO terminal of the IC card terminal 8 are similarly deactivated through the switching circuit 10. When the IC card 4 detects this deactivation process, the operation ends. At the same time, the companion chip 3 also stops operating.

  As described above, the contact IC card 4 is controlled from the main circuit 2. When this control operation is viewed from the main circuit 2, the companion chip 3 is as if an IC card (that is, a contact IC) according to the normal ISO7816 specification. Card).

  The main circuit 2 can cause the IC card 4 to execute a predetermined process via the companion chip 3 as necessary. For example, as shown in FIG. 3A, when acquiring a message from the data management server 101 connected to the cell phone network 100 for the mobile phone 1 to make a call with another mobile phone, the desired in the acquired message The data written in the contact IC card 4 can be read out according to an instruction from the data management server 101.

  In such a case, when the main circuit 2 extracts desired data from the message acquired from the data management server 101, and writes this data to the companion chip 3 according to the procedure according to the ISO7816 specifications, A control operation is performed, and this data is written to the contact IC card 4. When a data read command is included in the message sent from the data management server 101, the main circuit 2 extracts this data read command and sends it to the contact IC card 4 via the companion chip 3. The contact IC card 4 sends data corresponding to the command to the main circuit 2 via the companion chip 3, and the main circuit 2 sends the captured data to the data management server 101 via the mobile phone network 100.

  This operation is also performed in accordance with the ISO7816 specification, and the additional IO terminal of the contact IC card 4 is also held at “L”.

  The above operation simply reads and writes data, but the data management server 101 and the contact IC card 4 have an encryption function, a decryption function, a signature generation function, and a signature verification function, respectively. It goes without saying that encryption processing such as mutual authentication, encryption communication, and encryption key exchange may be performed by using.

  Next, a description will be given of the control operation when the carrier wave conforming to the ISO14443 specification is received by the non-contact antenna terminal 5 when the operation of the companion chip 3 is stopped by the deactivation process.

  When the carrier radio wave is received at the non-contact antenna terminal 5, the received RF signal is supplied to the RF detection / modulation circuit 14. The RF detection / modulation circuit 14 detects this RF signal, but this RF signal is also supplied to the power generation circuit 15 to be detected and stabilized to generate a power supply voltage having a necessary voltage value. . This power supply voltage is supplied to the power supply switching circuit 16. At this time, since the operation of the companion chip 3 is stopped by the deactivation processing, the power supply voltage is not supplied from the main circuit 2 to the power supply switching circuit 16 via the power supply terminal of the external connection terminal 7a. In such a case, the power supply switching circuit 16 supplies the power supply voltage supplied from the power supply generation circuit 15 to each part of the companion chip 3 such as the switching circuit 10, the contact IC card control circuit 11, and the transmission / reception circuit 12, and the like. At substantially the same time, the non-contact power source detection terminal 7b is set to “H” to notify the main circuit 2 that the power source voltage is supplied from the power source generation circuit 15, and the same notification is also given to the switching circuit 10. .

  The RF detection / modulation circuit 14 also supplies the received RF signal to the clock generation circuit 17. At this time, since no clock is input from the CLK terminal of the external connection terminal 7a, the clock generation circuit 211 generates an operation clock according to the ISO14443 specification from the supplied RF signal, and controls the switching circuit 10 and the contact IC card. This is supplied to each part of the companion chip 3 such as the circuit 11 and the transmission / reception circuit 12.

  When the switching circuit 10 receives a notification that the power supply voltage is supplied from the power generation circuit 15 from the power switching circuit 16, the switching circuit 10 switches to connect the contact IC card control circuit 11 to the contact IC card 4. Thereby, reset control, clock control, and power supply control of the contact IC card 4 from the contact IC card control circuit 11 are possible. At substantially the same time, the switching circuit 10 sets the external connection BUSY terminal 7c to “H” to notify the main circuit 2 that the contact IC card 4 is being used for non-contact communication.

  The contact IC card control circuit 11 is connected to the contact IC card 4 by the switching circuit 10, performs power control on the switching circuit 10, and supplies the power supply voltage supplied from the power switching circuit 16 from the IO terminal to the contact IC. Supply to card 4. At this time, the switching circuit 10 sets the additional IO terminal of the contact IC card 4 to “H”. Thereafter, the contact IC card control circuit 11 performs reset control and clock control, performs activation processing according to the procedure according to the ISO14443 specification, supplies a clock to the contact IC card 4, and controls its RST terminal.

  The contact IC card 4 starts to operate according to this activation process, but since its additional IO terminal is “H”, as a response, it is not an ATR defined in the ISO7816 specification, but 1 byte that tells the start of operation. Only data “Ox3B” is output and activated. The switching circuit 10 passes this data “Ox3B” to the contact IC card control circuit 11. The contact IC card control circuit 11 recognizes that the contact IC card 4 is correctly activated based on the data “Ox3B”.

  Thereafter, the received RF signal from the antenna terminal 18 is detected by the RF detection / modulation circuit 14 and supplied to the transmission / reception circuit 12, and the command data of the data string of the ISO14443 specification included in this reception signal is detected and the data buffer 13 is detected. Stored in When data of the data size defined by the ISO14443 specification is stored in the data buffer 212, the transmission / reception circuit 12 notifies the contact IC card control circuit 11 that the reception of command data is completed. Upon receiving this notification, the contact IC card control circuit 11 takes in the command data from the data buffer 13 via the transmission / reception circuit 12 and sends it to the contact IC card 4 via the switching circuit 10.

  In the contact IC card 4, this command data is input from the IO terminal. At this time, since the additional IO terminal is in the “H” state, the command data input from the IO terminal is received by non-contact communication. It is interpreted as data conforming to the ISO14443 specification, and necessary response data is created for this. This response data is output from the IO terminal of the contact IC card 4 and supplied to the contact IC card control circuit 11 via the switching circuit 10. The contact IC card control circuit 11 transfers the response data to the data buffer 13 and controls the transmission / reception circuit 12 to instruct a reply response process. The transmission / reception circuit 12 fetches response data from the data buffer 13 in accordance with this instruction. This response data is modulated by the RF detection / modulation circuit 14 in accordance with the ISO 14443 specification to become an RF signal, supplied from the antenna terminal 18 to the non-contact antenna 5 and transmitted as a carrier wave.

  Even after the reception of the command data at the non-contact communication antenna 5 is completed, a carrier wave consisting of only a clock is received from the non-contact communication antenna 5 until the transmission of response data to the command data is completed. This is supplied to the power generation circuit 15 and also to the clock generation circuit 17. Therefore, until the transmission of the response data is completed, a stable power supply voltage is generated by the power supply generation circuit 15 and supplied to each part of the companion chip 3, and a clock conforming to the ISO14443 specification is supplied to the clock generation circuit 17 And supplied to each part of the companion chip 3.

  When the transmission of the response data is completed, the reception of the carrier wave in accordance with the ISO14443 specification from the non-contact communication antenna 5 is also terminated, whereby the power supply voltage is not supplied from the power generation circuit 15 and the clock generation circuit 17 The generation of the clock is also terminated. As a result, both the contact IC card 4 and the companion chip 3 are deactivated to stop the operation, and the additional IO terminal of the contact IC card 4 is also set to “L”.

  The above operation is that the companion chip 3 looks as if it is a non-contact IC card according to the normal ISO14443 specification when viewed from the command data transmission side.

  By the way, as shown in FIG. 3B, the terminal control device 104 provided with the non-contact IC card reader / writer 103 can be used as the command data transmission side. In the above operation, the terminal control device 104 transmits a carrier wave 105 carrying command data from the non-contact IC card reader / writer 103 and returns response data to the non-contact IC card reader / writer 103 using the carrier wave 106. Therefore, the mobile phone 1 has a non-contact communication function.

  Further, the terminal control device 104 can cause the contact IC card 4 to execute processing via the companion chip 3 by controlling the non-contact IC card reader / writer 103 as necessary. For example, when the terminal control device 104 writes desired data to the companion chip 3 in accordance with the procedure according to the ISO 14443 specification, this data is written to the contact IC card 4, and the terminal control device 104 Data can also be read from the contact IC card 4 via the chip 3, whereby the terminal control device 104 can perform necessary processing on the read data.

  Although the above operation is merely for reading and writing data, the terminal control device 104 and the contact IC card 4 are provided with an encryption function, a decryption function, a signature generation function, and a signature verification function, respectively. It is also possible to perform encryption processing such as mutual authentication, encryption communication, and encryption key exchange.

  Next, the companion chip 3 is activated by the main circuit 2, and the non-contact IC card reader / writer 103 (FIG. 3) is used by the non-contact communication antenna 5 while the processing operation is being executed with the signal from the external connection terminal 7a. The operation when the carrier radio wave 105 conforming to the ISO14443 specification is received will be described.

  The RF detection / modulation circuit 14 receives the received RF signal input from the antenna terminal 18 by receiving the carrier wave 105 from the non-contact IC card reader / writer 103 (FIG. 3B) by the non-contact communication antenna 5. While detecting, it supplies also to the power supply generation circuit 15. FIG. The power supply generation circuit 15 detects this RF signal, generates a stable power supply voltage, and supplies it to the power supply switching circuit 16. At this time, since the power supply voltage is supplied from the power supply terminal of the external connection terminal 7a, the power supply switching circuit 16 does not select the power supply voltage supplied from the power supply generation circuit 15 and directly uses the power supply voltage of the external connection terminal 7a. The power supply voltage supplied from the power supply terminal is continuously supplied to each part of the companion chip 3 as it is. However, the power supply switching circuit 16 detects that the power supply voltage is supplied even if the power supply voltage from the power supply terminal of the external connection terminal 7a is continuously supplied to each part of the companion chip 3 as it is. The non-contact power supply detection terminal 7b is set to “H”, and this is notified to the main circuit 2 and also to the switching circuit 10. Therefore, the notification from the power supply switching circuit 16 is a notification as to whether or not non-contact communication is performed by the non-contact communication antenna 5.

  The RF detection / modulation circuit 14 also supplies the received RF signal to the clock generation circuit 17 to generate a clock conforming to the ISO14443 specification. This clock is supplied to each part of the companion chip 3.

  Further, the switching circuit 10 recognizes that the non-contact communication by the non-contact communication antenna 5 has started by the notification from the power switching circuit 16 that the power supply voltage from the power generation circuit 15 is supplied from the power switching circuit 16. Then, the connection of the contact IC card 4 is switched from the external connection terminal 7a, and hence from the main circuit 2 side to the contact IC card control circuit 11 side. At the same time, the switching circuit 10 sets the external connection BUSY terminal 7c to “H” to notify the main circuit 2 that the contact IC card 4 is being used for non-contact communication. The expansion IO terminal of card 4 is set to “H”. When the contact IC card 4 that is executing the processing operation with the signal from the external connection terminal 7a detects that the additional IO terminal has become “H”, the current state is recorded and held in the internal memory.

  Thereafter, the contact IC card control circuit 11 generates a warm reset defined by the ISO7816 specification using only the RST terminal of the contact IC card 4 so that the contact IC card 4 can be controlled. The contact IC card 4 starts the operation according to this warm reset, but since the additional IO terminal is “H”, it is not ATR defined in the ISO7816 specification, but 1-byte data “Ox3B” that indicates the operation start. Only "" is output and activated. The switching circuit 10 sends the 1-byte data to the contact IC card control circuit 11, and the contact IC card control circuit 11 confirms that the contact IC card 4 has been activated correctly by receiving the 1-byte data. recognize.

  On the other hand, the received RF signal from the antenna terminal 18 is detected by the RF detection / modulation circuit 14 and then supplied to the transmission / reception circuit 12 to be received on the carrier wave and received as command data in accordance with the ISO14443 specification. Recognized as a column and stored in the data buffer 13. When data corresponding to the data size defined by the ISO14443 specification (that is, command data) is accumulated in the data buffer 212, the transmission / reception circuit 12 notifies the contact IC card control circuit 11 that the data reception is completed. Upon receiving this notification, the contact IC card control circuit 11 takes in the data accumulated from the data buffer 13 via the transmission / reception circuit 12 and supplies it to the contact IC card 4 via the switching circuit 10.

  The contact IC card 4 captures this data from its IO terminal. At this time, since the additional IO terminal is set to the “H” state, this captured data is defined as ISO 14443 specifications as data by non-contact communication. The necessary response data is created. This response data is supplied from the IO terminal of the contact IC card 4 to the contact IC card control circuit 11 via the switching circuit 10. The contact IC card control circuit 11 transfers the received response data to the data buffer 13 and instructs the transmission / reception circuit 12 to perform a reply response process. The transmission / reception circuit 12 reads the response data from the database 13 according to the instruction and supplies the response data to the RF detection / modulation circuit 14. The RF detection / modulation circuit 14 performs a modulation process on a carrier wave (in this case, no modulation) of the received RF signal by using response means according to the ISO14443 specification. The RF signal output from the RF detection / modulation circuit 14 is supplied from the antenna terminal 18 to the antenna 5. As a result, the response data is transmitted on the received carrier wave and returned to the non-contact IC card reader / writer 103 shown in FIG.

  With the above operation, when viewed from the non-contact IC card reader / writer 103, the companion chip 3 appears as if it is a non-contact IC card according to the normal ISO14443 specification.

  When the contactless IC card reader / writer 103 receives the response data from the companion chip 3 and then no longer receives the carrier wave 105, the output of the power supply voltage from the power supply generation circuit 15 to the power supply switching circuit 16 ends. Also at this time, since the power supply voltage is supplied from the power supply terminal of the external connection terminal 7a, the power supply voltage is continuously supplied from the power supply switching circuit 16 to each part of the companion chip 3. However, since the switching circuit 10 is notified from the power supply switching circuit 16 that the power supply voltage is not supplied from the power generation circuit 15, the non-contact power supply detection terminal 7 b is set to “L” and the power supply voltage is supplied from the power generation circuit 15. The main circuit 2 is notified that it has been stopped.

  Further, since the switching circuit 10 notifies the power supply switching circuit 16 that the power supply voltage is not supplied from the power generation circuit 15, the contact IC card 4 is switched from the contact IC card control circuit 11 side to the external connection terminal 7a side. The contact IC card 4 is connected to the main circuit 2. At the same time, the switching circuit 10 switches the additional IO terminal of the contact IC card 4 from “H” to “L”. Also, a clock is supplied from the main circuit 2 to the CLK terminal of the external connection terminal 7a, and this clock is supplied from the switching circuit 10 to the clock generation circuit 17 to generate a clock conforming to the ISO7816 specification. This clock is supplied to each part of the companion chip 3.

  When the contact IC card 4 detects that the additional IO terminal is switched to “L”, the state before the warm reset held in the internal memory is read and set, and the external connection terminal 7 a from the main circuit 2. The processing of the data supplied via the IO terminal and the switching circuit 10 is resumed.

  Thus, even if the contact IC card 4 receives the carrier wave 105 from the non-contact IC card reader / writer during the execution of the process under the control of the main circuit 2, the contact IC card 4 only interrupts the process. When reception of the radio wave 105 is completed, the interrupted process is resumed and continued.

  Although the operation of the first embodiment has been described above, when the companion chip 3 is activated by the control of the main circuit 2 and is operated by a signal from the external connection terminal 7a, the antenna terminal 18 performs ISO14443. When a reception RF signal by the carrier wave 105 according to the specification is input, a signal such as data or a clock input from the IO terminal or the CLK terminal of the external connection terminal 7a is not used. For this reason, the main circuit 2 monitors the external connection BUSY terminal 7c of the companion chip 3, and when it is "H", it waits for data transmission from the external connection terminal 7a and response processing. When the external connection BUSY terminal 7c becomes “L” and the main circuit 2 detects this, the interrupted processing is resumed and continued.

  When the main circuit 2 is transmitting data or receiving data via the external connection terminal 7a, if the external connection BUSY terminal 7c of the companion chip 3 becomes "H", When the reception processing is interrupted and then the external connection BUSY terminal 7c becomes "L", the interrupted processing is resumed and continued. At this time, if transmission or reception processing according to the processing protocol defined in the ISO7816 specification is not completed, the operation is performed again for transmission or reception. When the contact IC card 4 detects that the additional IO terminal has changed to “L”, the state before the warm reset stored in the memory inside the contact is read and set. At this time, the interrupted state is received. If the above processing is not completed, the buffer (not shown) holding the reception data inside the contact IC card 4 is once cleared, and then reception is started again. If it is in the middle of transmission, it goes back and starts transmission again.

  In addition, when the companion chip 3 is activated by the control of the main circuit 2 and operates with a signal from the external connection terminal 7a, an RF signal received by the carrier radio wave 105 according to the ISO14443 specification is input from the antenna terminal 18. The main circuit 2 continues to send the power supply voltage to the power supply terminal of the external connection terminal 7a. The main circuit 2 monitors the non-contact power supply detection terminal 7b of the companion chip 3 and continues to supply the power supply voltage to the power supply terminal of the external connection terminal 7a even if it becomes “H”. This power supply voltage is supplied to each part of the companion chip 3 by the power supply switching circuit 16. When the power supply voltage is not supplied from the main circuit 2 and a reception RF signal based on the carrier wave 105 conforming to the ISO14443 specification is input from the antenna terminal 18, the power generation circuit 15 The generated power supply voltage is supplied to each part of the companion chip 3. As a result, this power supply voltage is also supplied to the contact IC card 4.

  When the companion chip 3 is in a state where the operation is stopped by the deactivation process, when the reception RF signal by the carrier wave 105 conforming to the ISO14443 specification is input from the antenna terminal 18, the main color 2 is not connected to the companion chip 3. Even if it is detected that the contact power supply detection terminal 7b is “H”, when the power supply voltage is supplied to the power supply terminal of the external connection terminal 7a, the power supply switching circuit 16 supplies the power supply voltage of the power supply terminal to the companion chip. 3 is supplied to each part. As a result, this power supply voltage is also supplied to the contact IC card 4.

  Here, the switching prohibition terminal 7d for external connection is set to "L" by the main circuit 2 in normal operation. However, when this is set to "H", the switching circuit 10 is an external connection terminal. 7a (therefore, the main circuit 2) side is not switched to the contact IC card control circuit 11 side, and the clock supplied to the clock generation circuit 17 from the external connection terminal 7a via the switching circuit 10 is not used. The operation of switching to the clock by the received RF signal from the RF detection / modulation circuit 14 is also prohibited. With the above operation, the main circuit 2 sets the external connection switching prohibition terminal 7d to “H”, so that even if the carrier wave 105 is received by the non-contact communication antenna 5, the processing by the contact IC card 4 is performed as it is. Can be continued.

  As described above, according to the first embodiment, as shown in FIG. 3A, data is taken from the data management server 101 and written to the contact IC card 4 mounted on the mobile phone 1, or the data management server. The data of the contact IC card 4 can be read from the terminal 101, and as shown in FIG. 3B, the terminal control device 104 is connected to the mobile phone 1 by non-contact communication by the non-contact IC card reader / writer 103. Data can be written to or read from the contact IC card 4, and for example, electronic money can be obtained from a server on the mobile phone network 100 (FIG. 3A). It is possible to use it by taking it in and writing it into the contact IC card 4 and withdrawing this electronic money by the terminal control device 104.

  Further, by controlling the contact IC card 4 via the external connection terminal 7a, when the contact IC card 4 of the mobile phone 1 is used as a contact IC card, the contactless IC card reader / writer 103 When the carrier radio wave 105 is received, the contact IC card 4 is preferentially executed as a non-contact type IC card. Therefore, for example, when the mobile phone 1 is used in a system in which the contactless IC card reader / writer 103 is arranged at an entrance / exit of an area and electronic money is withdrawn at the entrance / exit, the contact of the mobile phone 1 Even if the IC card 4 is used as a contact type IC card, it can function as a non-contact type IC card automatically at the entrance / exit, so that it can pass as it is.

  Furthermore, even if the carrier wave 105 is received by the external connection switching prohibiting terminal 7d, the contact IC card 4 of the mobile phone 1 can be used as it is as a contact IC card.

  FIG. 4 is a block diagram showing the main part of a second embodiment of the IC card device with communication function according to the present invention, in which 19 is a microcomputer (microcomputer), 20 is an R / W (read / write) function, and 21 is non-display. This is a contact protocol processing function, and parts corresponding to those in FIG.

  In this figure, the second embodiment has the same overall configuration as that of FIG. 1, and its usage is the same as that of FIGS. 3 (a) and 3 (b). In the companion chip 3, FIG. Instead of the contact IC card control circuit 11, the microcomputer as a central processing unit is used. The microcomputer 19 is also supplied with a power supply voltage from the power supply switching circuit 16 and with a clock from the clock generation circuit 17. The microcomputer 19 includes an R / W function 20 that performs a control function of the contact IC card 4, a contact card communication control function, and a protocol conversion function, and a non-contact protocol processing function 21.

  In the following, in order to simplify the description, the R / W function 20 and the non-contact protocol processing function 21 are regarded as means, and description is made so that each performs control and processing operations.

  Further, the contact IC card 4 has only terminals (power supply terminal, RST terminal, IO terminal and GND terminal) according to the ISO7816 specification, and does not have an additional IO terminal like the contact IC card 4 in FIG. The terminal of the switching circuit 10 is a terminal conforming to the ISO7816 specification for controlling the contact IC card 4.

  The power supply switching circuit 16 notifies the microcomputer 19 instead of the switching circuit 10 whether the power supply voltage is supplied from the power generation circuit 15.

  Next, the operation of the second embodiment will be described.

  The procedure and operation of using the companion chip 3 and the contact IC card 4 as a contact IC card by the procedure and control conforming to the ISO7816 specification via the external connection terminal 7a from the main circuit 2 (FIG. 1) are shown in FIG. This is the same as the first embodiment described in FIG.

  Next, a description will be given of the control operation when the carrier wave according to the ISO14443 specification is received at the non-contact antenna terminal 5 (FIG. 1) when the operation of the companion chip 3 is stopped by the deactivation process.

  When the carrier radio wave is received at the non-contact antenna terminal 5, the received RF signal is supplied to the RF detection / modulation circuit 14. The RF detection / modulation circuit 14 detects this RF signal, but this RF signal is also supplied to the power generation circuit 15 to be detected and stabilized to generate a power supply voltage having a necessary voltage value. . This power supply voltage is supplied to the power supply switching circuit 16. At this time, since the operation of the companion chip 3 is stopped by the deactivation processing, the power supply voltage is not supplied from the main circuit 2 to the power supply switching circuit 16 via the power supply terminal of the external connection terminal 7a. In such a case, the power supply switching circuit 16 supplies the power supply voltage supplied from the power supply generation circuit 15 to each part of the companion chip 3 such as the switching circuit 10, the contact IC card control circuit 11, and the transmission / reception circuit 12, and the like. At substantially the same time, the non-contact power source detection terminal 7b is set to “H” to notify the main circuit 2 that the power source voltage is supplied from the power source generation circuit 15, and the same notification is also given to the switching circuit 10. .

  The RF detection / modulation circuit 14 also supplies the received RF signal to the clock generation circuit 17. At this time, since no clock is input from the CLK terminal of the external connection terminal 7a, the clock generation circuit 211 generates an operation clock according to the ISO14443 specification from the supplied RF signal, and controls the switching circuit 10 and the contact IC card. This is supplied to each part of the companion chip 3 such as the circuit 11 and the transmission / reception circuit 12.

  In this case, the power supply voltage is not supplied from the power supply generation circuit 15 and is notified from the power supply switching circuit 16, whereby the R / W function 20 of the microcomputer 19 connects the switching circuit 10 from the external connection terminal 7 a side. Switch to the microcomputer 19 side. As a result, the contact IC card 4 is connected to the microcomputer 19 so that data can be exchanged between them. Thereafter, the R / W function 20 of the microcomputer 19 executes reset control, clock control, and power supply control so that the contact IC card 4 can be controlled. At the same time, the external connection BUSY terminal 7c becomes “H” to notify the main circuit 2 that the contact IC card 4 is in use. A power supply voltage is supplied from the power supply switching circuit 16 to the contact IC card 4 through the switching circuit 10 by the power supply control of the R / W function 20. Thereafter, the R / W function 20 executes reset control and clock control, supplies a clock to the contact IC card 4 by an activation procedure according to the ISO7816 specification, and controls its RST terminal.

  The contact IC card 4 starts to operate according to this activation process, and in response to this, outputs a 1-byte ATR according to the ISO7816 specification and is activated. This ATR is supplied to the microcomputer 19 via the switching circuit 10, and the R / W function 20 recognizes that the contact IC card 4 has been activated correctly. The R / W function 20 and the contact IC card 4 exchange commands and responses according to the ISO7816 specification.

  In the second embodiment, a non-contact processing function of the contact IC card 4 is selected using a “select File” command conforming to the ISO7816 specification. Thereby, the contact IC card 4 can process the data received by non-contact communication.

  The RF signal input from the antenna terminal 18 when the carrier radio wave is received by the non-contact communication antenna 5 is detected by the RF detection / modulation circuit 14 and supplied to the transmission / reception circuit 12. In the transmission / reception circuit 12, command data conforming to the ISO 14443 specification is detected from the detection output of the RF detection / modulation circuit 14, recognized as a data string, and stored in the data buffer 13. When data corresponding to the data size defined in the ISO14443 specification (including command data in this case) is accumulated in the data buffer 13, the transmission / reception circuit 12 notifies the microcomputer 19 that the data reception has been completed.

  Upon receiving this notification, the non-contact protocol processing function 21 of the microcomputer 19 takes in the data received from the data buffer 13 via the transmission / reception circuit 12 and performs interpretation according to the ISO 14443 specification to extract only the command data. When this command data is extracted, based on this, the R / W function 20 detects that the command data has been received, converts the command data from ISO14443 specification to ISO7816 specification, and converts the command data. The data is sent to the IO terminal of the contact IC card 4 via the circuit 10 and the IC card terminal 8.

  The contact IC card 4 takes in this command data, processes it as data for the non-contact processing function (ISO7816 specification) that has already been selectively activated, and creates necessary response data. This response data is sent to the switching circuit 10 via the IO terminal of the IC card terminal 8, and the switching circuit 10 sends this response data to the R / W function 20 of the microcomputer 19.

  The R / W function 20 converts the response data from the ISO 7816 specification to the one conforming to the ISO 14443 specification and passes the converted data to the non-contact protocol processing function 21. The non-contact protocol processing function 21 adds data required by the ISO 14443 specification to the fetched response data and transfers it to the data buffer 13, and controls the transmission / reception circuit 12 to instruct reply response processing. In accordance with this instruction, the transmission / reception circuit 12 captures response data from the data buffer 13 and supplies it to the RF detection / modulation circuit 14. The response data is modulated by the RF detection / modulation circuit 14 so as to be carried on the carrier wave (in this case, unmodulated) of the received RF signal using response means in accordance with the ISO14443 specification, and is supplied from the antenna terminal 18 to the antenna 5 for non-contact communication. Then, it is transmitted to the non-contact IC card reader / writer 103 (FIG. 3B).

  Thereafter, when the carrier radio wave is not received by the non-contact communication antenna 5, the power generation circuit 15 for the power switching circuit 16 does not generate the power voltage. For this reason, the clock generation circuit 17 also stops generating the clock, and the contact IC card 4 is also deactivated to stop its operation.

  As in the first embodiment, the above operation is similar to the first embodiment in that the companion chip 3 appears to be an operation of a non-contact IC card according to the normal ISO14443 specification. It is the same as the case of.

  Next, when the companion chip 3 is activated and operates with a signal from the external connection terminal 7a, when an RF signal is received from the antenna terminal 18 by receiving the carrier wave 105 according to the ISO14443 specification. The RF detection / modulation circuit 14 supplies the received RF signal of the carrier wave to the power generation circuit 15. The power supply generation circuit 402 detects this RF signal and supplies the power supply switching circuit 16 with a stabilized power supply voltage having a necessary voltage value. At this time, since the power is supplied from the power supply terminal of the external connection terminal 7a, the power supply switching circuit 16 is supplied from the power supply terminal of the external connection terminal 7a, not the power supply voltage supplied from the power supply generation circuit 15. The power supply voltage is continuously supplied to each part of the companion chip 3. At substantially the same time, the power supply switching circuit 16 sets the non-contact power supply detection terminal 7b to “H” and notifies the main circuit 2 that the power supply voltage is supplied from the power supply generation circuit 15.

  The RF detection / modulation circuit 14 also supplies the RF signal input from the ante terminal 18 to the clock generation circuit 17. The clock generation circuit 17 generates a clock conforming to the ISO14443 specification from this RF signal and supplies it to each part of the companion chip 3 as in the first embodiment, but the power supply voltage is supplied from the power supply generation circuit 15. If the power supply switching circuit 16 notifies that the power is switched, the R / W function 20 of the microcomputer 19 detects this and controls the switching circuit 10 to control the R / W function 20 of the microcomputer 19 with the contact IC card. 4 to allow data to be exchanged between them, and almost simultaneously, the external connection BUSY terminal 7c is set to “H” to notify the main circuit 2 that the contact IC card 4 is in use. .

  The R / W function 20 selects the non-contact processing function of the contact IC card 4 using a “select File” command defined in the ISO7816 specification before performing the reset process. Along with this, the contact IC card 4 records and holds the state of the signal from the main circuit 2 at this time in the internal memory, and then the processing function is switched from the contact processing function to the non-contact processing function. Thus, it is possible to perform processing on data sent by non-contact communication.

  On the other hand, the RF signal input from the antenna terminal 18 by the reception of the carrier wave by the non-contact communication antenna 5 is processed by the RF detection / modulation circuit 14 and the transmission / reception circuit 12 in the same manner as described above to detect command data. The command data is supplied to the R / W function 20 via the data buffer 13 and the non-contact protocol processing function 21. The R / W function 20 converts this command data into a protocol that conforms to the ISO 14443 specification and conforms to the ISO 7816 specification, and is supplied to the contact IC card 4. In the contact IC card 4, this command data is processed in a non-contact manner, response data is generated, and is supplied to the R / W function 20 of the microcomputer 19 via the switching circuit 10 as described above, and converted into data conforming to the ISO14443 specification. Protocol conversion is performed. The response data compliant with the ISO 14443 specification is put on the RF signal received by processing by the non-contact protocol processing function 21, the transmission / reception circuit 12, and the RF detection / modulation circuit 14, and the antenna terminal 18 is used for non-contact communication. By being supplied to the antenna 5, it is transmitted to the non-contact IC card reader / writer 103 on the carrier wave.

  When viewed from the non-contact IC card reader / writer 103, the above operation appears as if the companion chip 3 is an operation of a non-contact IC card according to the normal ISO14443 specification, as in the case of the first embodiment.

  When the non-contact communication antenna 5 does not receive carrier waves according to the ISO14443 specification, the power supply voltage is not supplied from the power generation circuit 15 to the power supply switching circuit 16, but the power supply voltage input from the power supply terminal of the external connection terminal 7a. Is supplied from the power supply switching circuit 16 to each part of the companion chip 3. At this time, the non-contact power source detection terminal 7b becomes “L”, thereby notifying the main circuit 2 that the power source voltage is not supplied from the power source generating circuit 15. The clock generation circuit 17 is also controlled to supply a clock supplied from the CLK terminal of the external connection terminal 7 a via the switching circuit 10 to each part of the companion chip 3.

  Thereafter, the R / W function 20 controls the switching of the switching circuit 10 based on the notification from the power switching circuit 16 that the power supply voltage is not supplied from the power switching circuit 16 to the contact IC. The card 4 is switched to the external connection terminal 7a side, and the contact IC card 4 performs a contact process using a “Select File” command conforming to the ISO7816 specification.

  Therefore, in the contact IC card 4, the state held in the internal memory is read and set, and the signal input from the IO terminal of the external connection terminal 7a can be processed.

  In this case, in order to record the state of the contact IC card 4 in the internal memory, the state data is saved and restored by the “Selecet File” command, and the processing is switched. Since the processing time of the command is added to the processing time of the non-contact communication processing, such processing is omitted, and instead, the processing performed until the processing for the non-contact communication is canceled by reset, You may make it shorten the processing time until a non-contact communication process is started.

  As described above, in the second embodiment, in addition to the effects of the first embodiment, the IC card terminal 8 is used only as a signal line defined by ISO7816. As a result, it is possible to use a conventional IC card conforming to ISO7816.

It is a block diagram which shows 1st Embodiment of the IC card apparatus with a communication function by this invention. It is a block diagram which shows one specific example of the companion chip | tip in FIG. It is a block diagram which shows the specific example of the system using the IC card apparatus with a communication function by this invention. It is a block diagram which shows the principal part of 2nd Embodiment of the IC card apparatus with a communication function by this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Mobile phone 2 Main circuit 3 Companion chip 4 Contact IC card 5 Non-contact communication antenna 7 Main circuit terminal 7a External connection terminal 7b Non-contact power source detection terminal 7c External connection BUSY terminal 7d External connection switching prohibition terminal 8 IC Card terminal 10 Switching circuit 11 Contact IC card control circuit 12 Transmission / reception circuit 13 Data buffer 14 RF detection / modulation circuit 15 Power generation circuit 16 Power switching terminal 17 Clock generation circuit 18 Antenna terminal 19 Microcomputer 20 R / W function 21 Non-contact protocol Processing function

Claims (10)

An IC card device that carries a contact communication between the main circuit and the contact IC card by mounting the contact IC card and controlling the contact IC card from the main circuit,
A contactless communication antenna for performing contactless communication;
Processing means for processing a received signal of the non-contact communication antenna;
And switching means for switching between connection of the contact IC card to the main circuit and connection to the processing means. When non-contact communication is performed by the non-contact communication antenna, the switching means switches the processing means to An IC card device with a communication function, wherein the processing means is selected and connected to the contact IC card. In claim 1,
Power supply generating means for generating a power supply voltage based on a received signal from the non-contact antenna;
Detecting means for detecting that the power supply generating means generates a power supply voltage, and when the switching means detects the generation of the power supply voltage by the power supply generating means, the connection to the contact IC card is connected to the processing means. IC card device with communication function, characterized in that switching to the side is performed. In claim 2,
When the power supply voltage is supplied from the main circuit, the power supply voltage is supplied to the contact IC card, the power supply voltage is not supplied from the main circuit, and the power supply voltage is supplied from the power supply generation unit. An IC card device with a communication function, comprising power supply switching means for supplying the power supply voltage to the contact IC card. In claim 1, 2 or 3,
The contact communication and the non-contact communication have different protocols,
A communication function characterized in that, according to switching by the switching means between the main circuit connected to the contact IC card and the processing means, the processing procedure in the contact IC card is a procedure according to a corresponding protocol. IC card device. In claim 1, 2, 3 or 4,
The processing means has control means for controlling the contact IC card,
When the contact IC card is connected to the main circuit by the switching means, the contact IC card is controlled by the main circuit, and when the contact IC card is connected to the processing means by the switching means, An IC card device with a communication function controlled by the control means. In claim 1,
A power generation unit that generates a power supply voltage based on a reception signal from the non-contact antenna, and a detection unit that detects that the power generation unit generates a power supply voltage, and
The processing means includes switching control means for controlling the switching means,
The switching control means, when detecting the generation of the power supply voltage by the power generation means, controls the switching means to switch the connection to the contact IC card to the processing means side. Card device. In claim 6,
When the power supply voltage is supplied from the main circuit, the power supply voltage is supplied to the contact IC card, the power supply voltage is not supplied from the main circuit, and the power supply voltage is supplied from the power supply generation unit. An IC card device with a communication function, comprising power supply switching means for supplying the power supply voltage to the contact IC card. In claim 6 or 7,
The contact communication and the non-contact communication have different protocols,
The processing means converts a signal received by the non-contact communication protocol of the non-contact communication antenna into a signal according to the contact communication protocol and supplies the signal to the contact IC card, and the contact communication from the contact IC card. An IC card device with a communication function, comprising protocol conversion means for converting a signal into the non-contact communication protocol according to the protocol and transmitting the signal from the non-contact communication antenna. In any one of Claims 1-8,
When the contact IC card is connected to the main circuit side by the switching means, the clock for the contact IC card is generated based on the clock supplied from the main circuit,
When the contact IC card is connected to the processing means by the switching means, a clock for the contact IC card is generated based on a signal received by the non-contact communication antenna. IC card device. In any one of Claims 1-9,
The switching unit can be prohibited from changing the connection state between the contact IC card and the main circuit to the connection state between the contact IC card and the processing unit in response to a command from the main circuit to the switching unit. An IC card device with a communication function.

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