JP2003208570A - Portable IC card reader / writer and communication method - Google Patents

Abstract

(57) [Summary] A portable IC card R / W compatible with either a contact type or a wireless type IC card R / W is provided. SOLUTION: Wireless communication is performed with a wireless IC card R / W4, and an output voltage generated by the wireless communication is compared with an output voltage of a power supply voltage to determine whether or not the wireless IC card R / W4 is in communication with the wireless IC card R / W4. Circuit 33 for determining whether or not a contact IC
A data conversion unit 20 for mutually converting data input from the card 3 by wire communication and data input by wireless communication from the wireless IC card R / W4, and converting between a wireless communication protocol and a wired communication protocol. When it is determined by the comparison result of the comparison circuit 33 that it is in the communication state, it performs wireless communication with the wireless IC card R / W4.
A processing control unit 10 that controls the data conversion unit 20 to perform wired communication only with the card 3 is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable IC card reader / writer for reading, changing, and displaying IC card data, and a communication method using the portable IC card reader / writer, and more particularly to an IC. The present invention relates to a portable IC card reader / writer and a communication method for converting card data into desired IC card reader / writer data.

[0002]

2. Description of the Related Art Conventionally, contact type IC cards and non-contact type IC cards (wireless type IC cards) are known as IC cards. The contact type IC card is electrically connected by being inserted into an IC card reader / writer for wire communication (hereinafter referred to as contact type IC card R / W), and it is possible to communicate by wire. On the other hand, the wireless IC card
Wireless communication reader / writer (hereinafter, wireless IC card R
/ W), it is possible to perform wireless communication in a contactless manner.

[0003]

However, the contact type IC card which communicates by wire cannot communicate with the wireless type IC card R / W. In addition, in a wireless IC card that performs wireless communication, a contact IC
Cannot communicate with card R / W. Therefore, there is an inconvenience that the user has to use the wireless IC card and the wired IC card properly according to the communication method of the IC card R / W.

Therefore, the present invention has been made in view of the above problem, and converts the data of the contact type IC card into the data of the wireless type IC card R / W, and the communication data of the wireless type IC card is converted into the contact type IC card. By converting into communication data of R / W, even if there is only one of the contact type IC card and the wireless type IC card, the contact type IC card R / W
Another object of the present invention is to provide a portable IC card reader / writer (hereinafter referred to as a portable IC card R / W) and a communication method capable of supporting both the wireless IC card R / W.

[0005]

The first feature of the present invention is to:
Wireless communication is performed with the wireless IC card R / W, the output voltage generated by the wireless communication is compared with the output voltage of the power supply voltage, and it is determined whether or not the wireless IC card R / W is in communication. The data input from the comparison circuit and the contact type IC card by wire communication and the data input from the wireless IC card R / W by wireless communication are mutually converted.
If it is determined that the communication state is in the communication state based on the determination result of the data conversion unit that performs the conversion between the wireless communication protocol and the wired communication protocol, the comparison circuit, the wireless IC card R / W
If it is determined that the portable IC card R / W includes a processing control unit that controls the data conversion unit so as to perform wired communication only with the contact type IC card when wireless communication is performed with Is.

Further, the data conversion unit is a first parallel conversion circuit for converting predetermined serial data of the contact type IC card input through the interface into parallel data, and a wireless type IC card input through the antenna. R
/ W demodulating circuit for demodulating predetermined serial data, a second parallel converting circuit for converting the demodulated predetermined serial data into parallel data, and parallel data converted by the first and second parallel converting circuit circuits. On the other hand, a protocol conversion circuit for converting a wireless communication protocol and a wired communication protocol, a first serial conversion circuit for converting parallel data converted to the wired communication protocol into serial data, and a wireless communication protocol. A second serial conversion circuit for converting the parallel data into serial data, and a modulation circuit for modulating the serial data input from the second serial conversion circuit are provided.

According to the portable IC card R / W according to the first aspect of the present invention, the communication data of the contact type IC card can be converted into the communication data of the wireless IC card R / W.
Both the contact type IC card R / W and the wireless type IC card R / W can be supported.

A second feature of the present invention is to perform wired communication with the contact type IC card R / W, compare the output voltage supplied from the contact type IC card R / W with the output voltage of the power supply voltage,
A comparison circuit for determining whether or not the IC card R / W is in communication with the contact IC card R / W, and data input by wire communication from the contact IC card R / W and data input by wireless communication from the wireless IC card. When it is determined that the communication state is in the communication state based on the determination result of the data conversion unit and the comparison circuit that perform mutual conversion and conversion between the wireless communication protocol and the wired communication protocol, the contact type IC card R / W and the wired If communication is performed and it is determined that communication is not in progress,
A portable IC card R / equipped with a processing control unit that controls the data conversion unit to perform wireless communication only with the wireless IC card
That is W.

Further, the data conversion unit is a first parallel conversion circuit for converting predetermined serial data of the contact type IC card R / W inputted through the interface into parallel data, and a radio inputted through the antenna. Demodulation circuit for demodulating predetermined serial data of the IC card, second parallel conversion circuit for converting the demodulated predetermined serial data into parallel data, and parallel data converted by the first and second parallel conversion circuit circuits A protocol conversion circuit for converting between a wireless communication protocol and a wired communication protocol, a first serial conversion circuit for converting parallel data converted into the wired communication protocol into serial data, and converted into a wireless communication protocol. A second serial conversion circuit for converting parallel data to serial data, Characterized in that it comprises a modulation circuit for modulating the serial data input from the real conversion circuit.

According to the portable IC card R / W according to the second aspect of the present invention, the communication data of the wireless IC card can be converted into the communication data of the contact IC card R / W.
Both the contact type IC card R / W and the wireless type IC card R / W can be supported.

A third feature of the present invention is to convert predetermined serial data input from a contact type IC card or a contact type IC card R / W via an interface into parallel data, and convert the converted parallel data. Wireless communication protocol conversion step, wireless communication protocol conversion parallel data conversion step into serial data conversion step, modulated serial data modulation step, modulated serial data via an antenna wireless IC The communication method includes a step of transmitting to the card R / W or the wireless IC card. According to the communication method of the third aspect of the present invention, a contact IC
The communication data of the card or the contact type IC card R / W can be converted into the communication data of the wireless IC card R / W or the wireless IC card and can be mutually transmitted and received.

A fourth feature of the present invention is that the step of demodulating predetermined serial data received from the wireless IC card R / W or the wireless IC card through the antenna, the demodulated serial data into parallel data. A step of converting, a step of converting the converted parallel data into a wired communication protocol, a step of converting the parallel data converted into the wired communication protocol into serial data, and a contact type IC through the interface of the converted serial data. The communication method includes a step of transmitting to a card or a contact type IC card R / W.

According to the communication method of the fourth aspect of the present invention, the communication data of the wireless IC card R / W or the wireless IC card is converted into the communication data of the wireless IC card R / W or the wireless IC card. It becomes possible to convert into communication data and mutually transmit and receive.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the drawings. In the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals.
However, it should be noted that the drawings are schematic and the ratios of the respective dimensions are different from the actual ones. Therefore, specific dimensions and the like should be determined in consideration of the following description. Further, it is needless to say that the drawings include portions having different dimensional relationships and ratios.

(First Embodiment) A portable IC card R / W1 according to the first embodiment shown in FIG.
The communication data of the C card 3 and the communication data of the wireless IC card R / W 4 are mutually converted. Portable IC
The card R / W1 has a constant thickness, and the thickness is about 7 mm to 10 mm, although it is limited by the thickness of the battery, liquid crystal display device, etc. to be mounted. As shown in FIG. 1, the portable type I
The C card R / W1 includes a wireless communication unit 8 and a contact type IC for wirelessly communicating with the wireless IC card R / W4.
Data held on the card 3 and wireless IC card R
A display unit 7 such as a liquid crystal screen for displaying data received from / W4 and a battery 32 such as a battery for driving the portable IC card R / W1 are mounted. The portable IC card R / W1 is electrically connected to the contact type IC card 3 by directly contacting the contact type IC card 3 and performs serial communication with the contact type IC card 3. The wireless communication unit 8 may be configured to be removable from the main body of the portable IC card R / W1.

As shown in FIG. 2, the portable IC card R / W 1 according to the first embodiment is a processing control unit for controlling processing of various data and processing programs according to a communication method (contact, wireless). 10. Data conversion unit 2 for converting data of contact type IC card 3 into data for wireless type IC card
0, a serial transmission / reception I / F (interface) 21 for electrically connecting and outputting various data by contact with a contact type IC card, and a processing control unit 10 for displaying various data. Type IC card R / W1, a keypad for inputting, an operation unit 31 such as a touch panel, a plurality of circuit blocks of the portable IC card R / W1, and a battery 32 and a battery 32 that supply power.
Of the output voltage generated by the rectifier circuit 35, which compares the output voltage of the rectifier circuit 35 with the output voltage of the rectifier circuit 35 to determine whether the wireless IC card R / W4 is in communication. Half-wave rectification or full-wave rectification of a power supply radio wave signal (AC signal) received via a shunt regulator 34 that generates a constant voltage by consuming power and an antenna 40 to generate a power supply potential (DC power supply). Rectifying circuit 35, and wireless IC card R by transmitting and receiving radio waves
/ W4 to exchange data, wireless type I
It is composed of an antenna 40 that acquires electric power from the C card R / W 4.

The processing controller 10 comprises a CPU (central processing controller) 11, a ROM 12, a RAM 13, a non-volatile memory 14, and a system control circuit 15. The CPU 11 is a processing control device that executes various data and processing programs held in the ROM 12, RAM 13, and non-volatile memory 14. Also, the CPU is 1
1, a ROM 12, a RAM 13, a non-volatile memory 14, and a control means for controlling the input and output of the system control circuit 15, respectively. The ROM 12 functions as a program memory that holds a program executed by the CPU 11, and is programmed with a method for processing serial data and parallel data. RAM13 is C
The PU 11 holds data used during program execution processing, functions as a data memory used as a work area, and is used for temporary storage of data. The non-volatile memory 14 is a memory such as an EEPROM or FRAM used as a data storage memory. The system control circuit 15 includes a CPU 11,
It is connected to each circuit block of the ROM 12, the RAM 13, the non-volatile memory 14, the protocol conversion circuit 24, and the comparison circuit 33, and controls various signals.

The data conversion section 20 is a parallel conversion circuit A.
22, parallel conversion circuit B25, protocol conversion circuit 2
4, serial conversion circuit A23, serial conversion circuit B2
6, a modulation circuit 27 and a demodulation circuit 28. The parallel conversion circuit A22 is a circuit block that converts serial data input from the contact IC card 3 via the serial transmission / reception I / F 21 into parallel data. The parallel conversion circuit B25 is a circuit block that converts serial data output from the demodulation circuit 28 into parallel data. The serial conversion circuit A23 is a circuit block that is connected to the protocol conversion circuit 24 and converts parallel data into serial data. Protocol conversion circuit 24
Is a parallel conversion circuit A22, a parallel conversion circuit B2
5, serial conversion circuit A23, and serial circuit B26
Is a circuit block that is connected to a wireless communication protocol and converts between a wireless communication protocol and a wired communication protocol. Modulation circuit 27
Is a circuit block that modulates serial data according to the communication system. The demodulation circuit 28 is a circuit block that demodulates data received from the wireless IC card R / W via the antenna into serial data.

Next, the portable IC according to the first embodiment
In the card R / W1, a processing operation when communication data is input from the contact type IC card 3 to the portable IC card R / W1 and output to the wireless IC card R / W4 will be described.

(A) First, when it is detected that the contact type IC card 3 is inserted in the portable IC card R / W, the serial transmission / reception I / F 21 performs serial communication with the contact type IC card 3. The serial data is received from the contact type IC card 3. Then, the received serial data is output to the parallel conversion circuit A22.

(B) The parallel conversion circuit A22 converts the serial data input from the contact type IC card 3 via the serial transmission / reception I / F 21 into parallel data and outputs the parallel data to the protocol conversion circuit 24. Here, the parallel data is generally 8-bit unit data.

(C) The protocol conversion circuit 24 converts the contact communication protocol into a wireless communication protocol,
The parallel data to be transmitted to the wireless IC card R / W4 is output to the serial conversion circuit A23. Where C
The PU 11 is capable of interpreting the received data held in the protocol conversion circuit 24 via the system control circuit 15 and making changes or the like to the received data.

(D) The serial conversion circuit A23 converts the parallel data output from the protocol conversion circuit 24 into serial data and outputs the serial data to the modulation circuit 27.

(E) The modulation circuit 27 modulates the serial data output from the serial conversion circuit A23 according to the communication system. For example, when performing phase modulation, phase modulation is performed at the data change point of serial data (0 → 1 or 1 → 0). The modulated serial data is transmitted to the wireless IC card R / W4 via the antenna 40.

Next, the portable IC according to the first embodiment
In the card R / W1, communication data is input from the wireless IC card R / W4 to the portable IC card R / W1,
The processing operation when output to the contact type IC card 3 will be described.

(B) First, when a radio wave is received from the wireless IC card R / W 4 via the antenna 40, the rectifier circuit 35 rectifies the received radio wave to generate a power supply potential and outputs it to the comparison circuit 33. To do.

(B) The comparison circuit 33 compares the voltage of the battery 32 with the output voltage output from the rectifier circuit 35 to determine whether or not it is in communication with the wireless IC card R / W 4. The determination result is output to the CPU 11 via the system control circuit 15.

(C) When it is determined by the comparison result of the comparison circuit 33 that the wireless IC card R / W4 is in communication, the demodulation circuit 28 serializes the communication data received via the antenna 40. The data is demodulated and output to the parallel conversion circuit B25.

(D) The parallel conversion circuit B25 converts the serial data output from the demodulation circuit 28 into parallel data and outputs the parallel data to the protocol conversion circuit 24.

(E) The protocol conversion circuit 24 converts a wireless communication protocol into a contact communication protocol,
The parallel data to be transmitted to the contact type IC card 3 is output to the serial conversion circuit B26. Here, CPU1
1 is capable of interpreting received data via the system control circuit 15 and making changes etc. to the data.

(F) The serial conversion circuit B26 converts the parallel data output from the protocol conversion circuit 24 into serial data, and outputs the serial data to the serial transmission / reception I / F 21.

(G) The serial transmission / reception I / F 21 transmits the serial data output from the serial conversion circuit B26 to the contact type IC card 3.

(H) On the other hand, when the comparison circuit 33 determines that the wireless IC card R / W 4 is not in communication, the CPU 11 performs wired communication only with the contact IC card 3. To control. The CPU 11 interprets the received data received from the contact type IC card 3 via the protocol conversion circuit 24, and controls the display unit 30 to display the received data.

According to the portable IC card R / W according to the first embodiment of the present invention as described above, the communication data of the contact type IC card 3 is converted into the communication data of the wireless IC card R / W4. Therefore, it is possible to support both the contact type IC card R / W6 and the wireless type IC card R / W4.

(Second Embodiment) A portable IC card R / W2 according to a second embodiment shown in FIG.
The communication data of the C card 5 and the communication data of the contact type IC card R / W 6 are mutually converted. The portable IC card R / W1 according to the first embodiment shown in FIG.
While wired communication is performed with the contact type IC card 3 and wireless communication is performed with the wireless IC card R / W4, the portable IC card R / W1 according to the second embodiment is used with the wireless IC card 5. The difference is that wireless communication is performed and wired communication is performed with the contact type IC card R / W 6.

The portable IC card R / W2 has a constant thickness, and the thickness is about 7 mm to 10 mm, although it is restricted by the thickness of the battery, liquid crystal display device, etc. to be mounted. Figure 3
As shown in FIG. 3, the portable IC card R / W2 is connected to the contact type IC card R / W6 directly, and the wired communication unit 9 for performing communication and the data held in the wireless IC card 5 are stored. A display unit 7 such as a liquid crystal screen for displaying data received from the contact type IC card R / W 6 and a battery 32 such as a battery for driving the portable IC card R / W 2 are mounted. The wired communication unit 9 is a portable I
The C card R / W2 main body may be configured to be removable. The portable IC card R / W 2 is wirelessly connected to the wireless IC card 5 and performs serial communication with the wireless IC card 5.

As shown in FIG. 4, the portable IC card R / W 2 according to the second embodiment controls the processing of various data and processing programs according to the communication method (contact, wireless). 50, serial transmission / reception I / F (interface) 21 for electrically connecting to the contact type IC card R / W 6 by contact to input / output various data, and data of the wireless type IC card 5 for contact type IC card data The data conversion unit 60 for converting into the data, the display unit 7 connected to the processing control unit 50 for displaying various data, the amplifier / waveform shaping circuit 39 for amplifying and shaping the waveform of the radio wave received via the antenna 40, and the battery 32. The output voltage and the output voltage output from the power supply voltage detection circuit 38 are compared, and the contact IC
A comparator circuit 37 for determining whether or not the card R / W6 is in a communication state, connected to the comparator circuit 37, detects the voltage supplied from the contact type IC card R / W6, and outputs the detected voltage to the comparator circuit 37. The power supply voltage detection circuit 38 and the antenna 40 that exchanges data with the wireless IC card by transmitting and receiving radio waves. The internal configurations of the processing control unit 50 and the data conversion unit 60 are the same as those of the portable IC card R / W 1 according to the first embodiment shown in FIG.

Next, the portable IC according to the second embodiment
In the card R / W2, communication data is input from the contact type IC card R / W6 to the portable IC card R / W2,
The processing operation when output to the wireless IC card 5 will be described.

(A) First, when it is detected that the portable IC card R / W2 has been inserted into the contact type IC card R / W, the serial transmission / reception I / F 21 determines that the contact type IC card R / W2.
/ W6 serial communication with contact type IC card R / W
6 receives serial data. Then, the received serial data is output to the parallel conversion circuit A22.

(B) The parallel conversion circuit A22 is a contact type IC card R / W6 via the serial transmission / reception I / F 21.
The serial data input from is converted into parallel data and output to the protocol conversion circuit 24. Here, the parallel data is generally 8-bit unit data.

(C) The protocol conversion circuit 24 converts the contact communication protocol into a wireless communication protocol,
The parallel data to be transmitted to the wireless IC card 5 is output to the serial conversion circuit A23. Here, CPU1
1 can interpret the received data of the protocol conversion circuit 24 via the system control circuit 15 and can change the received data.

(D) The serial conversion circuit A23 converts the parallel data output from the protocol conversion circuit 24 into serial data and outputs the serial data to the modulation circuit 27.

(E) The modulation circuit 27 modulates the serial data output from the serial conversion circuit A23 according to the communication system. The modulated serial data is transmitted to the wireless IC card 5 via the antenna 40.

Next, the portable IC according to the second embodiment
In the card R / W2, a processing operation when communication data is input from the wireless IC card 5 to the portable IC card R / W2 and output to the contact type IC card R / W6 will be described. Compared with the processing operation of the portable IC card R / W 2 according to the first embodiment, the communication data is a wireless IC.
The difference is that the input is not from the card 5 but from the wireless IC card R / W 4.

(A) First, when a radio wave is received from the wireless IC card 5 via the antenna 40, the amplifier / waveform shaping circuit 39 amplifies the received radio wave and shapes the waveform to determine the received data. And outputs it to the demodulation circuit 28.

(B) When it is detected that the main body of the portable IC card R / W2 is inserted into the contact type IC card R / W6, the power supply voltage detecting circuit 38 causes the contact type IC card R / W6.
6 detects the voltage supplied from 6 and compares the detected voltage with the comparison circuit 3
Output to 7.

(C) The comparison circuit 37 compares the voltage of the battery 32 with the output voltage output from the power supply voltage detection circuit,
It is determined whether or not it is in communication with the contact type IC card R / W 6, and the determination result is output to the CPU 11 via the system control circuit 15.

(D) When it is determined by the comparison result of the comparison circuit 33 that the contact type IC card R / W 6 is in communication, the demodulation circuit 28 serializes the communication data received via the antenna 40. The data is demodulated and output to the parallel conversion circuit B25.

(E) The parallel conversion circuit B25 converts the serial data output from the demodulation circuit 28 into parallel data and outputs the parallel data to the protocol conversion circuit 24.

(F) The protocol conversion circuit 24 converts a wireless communication protocol into a contact communication protocol,
The parallel data to be transmitted to the contact type IC card R / W6 is output to the serial conversion circuit B26. Where C
The PU 11 can interpret the received data via the system control circuit 15 and can change the data.

(G) The serial conversion circuit B26 converts the parallel data output from the protocol conversion circuit 24 into serial data, and outputs the serial data to the serial transmission / reception I / F 21.

(H) The serial transmission / reception I / F 21 transmits the serial data output from the serial conversion circuit B26 to the contact type IC card R / W6.

(B) On the other hand, when the comparison circuit 37 determines that the contact IC card R / W 6 is not in the communication state, the CPU 11 wirelessly communicates only with the wireless IC card 5. To control. The CPU 11 interprets the received data received from the wireless IC card 5 via the protocol conversion circuit 24 and controls the display unit 7 to display the received data.

According to the portable IC card R / W according to the second embodiment of the present invention as described above, the communication data of the wireless IC card 5 is converted into the communication data of the contact type IC card R / W 6. Therefore, it is possible to support both the contact type IC card R / W6 and the wireless type IC card R / W4.

[0055]

As described above, according to the portable IC card R / W and the communication method using the same according to the embodiments of the present invention, the IC card has either a wired communication function or a wireless communication function. Even if there is only one, by adding the function of the other to the portable IC card R / W, the contact type I
It can be used for both the C card R / W and the wireless IC card R / W.

[Brief description of drawings]

FIG. 1 is an external view of a portable IC card R / W1 according to a first embodiment of the present invention.

FIG. 2 is a diagram showing an internal configuration of a portable IC card R / W1 according to the first embodiment of the present invention.

FIG. 3 is an external view of a portable IC card R / W2 according to a second embodiment of the present invention.

FIG. 4 is a diagram showing an internal configuration of a portable IC card R / W2 according to a second embodiment of the present invention.

[Explanation of symbols]

1, 2 Portable IC card R / W (reader / writer) 3 Contact IC card 4 Wireless IC card R / W (reader / writer) 5 Wireless IC card 6 Contact IC card R / W (reader / writer) 7 Display 8 Wireless communication section 9 Wired communication unit 10,50 Processing control unit 11 CPU (Central Processing Unit) 12 ROM 13 RAM 14 Non-volatile memory 15 System control circuit 20,60 data converter 21 Serial transmission / reception I / F (interface) 22 Parallel conversion circuit A 23 Serial conversion circuit A 24 Protocol conversion circuit 25 Parallel conversion circuit B 26 Serial conversion circuit B 27 Modulation circuit 28 Demodulation circuit 31 Operation part 32 batteries 33, 37 comparison circuit 34 Shunt Regulator 35 Rectifier circuit 38 Power supply voltage detection circuit 39 Amplifier and waveform shaping circuit 40 antenna

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Hiroo Nakano             1st Komukai Toshiba-cho, Sachi-ku, Kawasaki-shi, Kanagawa             Ceremony Company Toshiba Microelectronics Sen             Inside F-term (reference) 2C005 MA33 NA02 TA21 TA26                 5B058 CA13 CA15 CA23 KA06

Claims (6)

[Claims] 1. A wireless IC card reader / writer is wirelessly communicated, and an output voltage generated by the wireless communication is compared with an output voltage of a power supply voltage to establish a communication state with the wireless IC card reader / writer. A comparison circuit for determining whether or not there is the data, the data input by wire communication from the contact type IC card and the data input by wireless communication from the wireless IC card reader / writer are mutually converted, and wireless communication is performed. A data conversion unit for converting between a protocol and a wired communication protocol, and when the result of the comparison circuit determines that the communication state is established, wireless communication is performed with the wireless IC card reader / writer to establish a communication state. If it is determined that the data conversion unit is not present, a processing control unit that controls the data conversion unit to perform wired communication only with the contact type IC card is provided. Portable IC card reader-writer according to claim. 2. The data conversion section, which is input via the antenna, and a first parallel conversion circuit which converts predetermined serial data of the contact type IC card input via the interface into parallel data. A demodulation circuit that demodulates the predetermined serial data of the wireless IC card reader / writer; a second parallel conversion circuit that converts the demodulated predetermined serial data into parallel data; and the first and second A protocol conversion circuit for converting the wireless communication protocol and the wired communication protocol to the parallel data converted by the parallel conversion circuit circuit; and a first for converting the parallel data converted to the wired communication protocol into serial data. Serial conversion circuit and parallel data converted to the wireless communication protocol. 2. The portable IC card reader according to claim 1, further comprising: a second serial conversion circuit for converting the serial data into analog data, and a modulation circuit for modulating the serial data input from the second serial conversion circuit. lighter. 3. Performing wired communication with a contact type IC card reader / writer and comparing the output voltage supplied from the contact type IC card reader / writer with the output voltage of a power supply voltage,
A comparison circuit for determining whether or not the contact type IC card reader / writer is in communication, data input by wire communication from the contact type IC card reader / writer, and wireless communication input from a wireless type IC card. The data conversion unit for converting data between each other and also for converting the wireless communication protocol and the wired communication protocol, and the contact type in the case where it is determined that the data is in the communication state based on the determination result of the comparison circuit. And a processing control unit that controls the data conversion unit so as to perform wireless communication with the IC card reader / writer and perform wireless communication only with the wireless IC card when it is determined that the IC card reader / writer is not in the communication state. Characteristic portable IC card reader / writer. 4. The contact conversion type IC card reader, which is input via the interface,
A first parallel conversion circuit for converting predetermined serial data of the writer into parallel data, a demodulation circuit for demodulating predetermined serial data of the wireless IC card input via the antenna, and the demodulated predetermined Second parallel conversion circuit for converting the serial data into parallel data, and converting the wireless communication protocol and the wired communication protocol to the parallel data converted by the first and second parallel conversion circuit circuits. A protocol conversion circuit; a first serial conversion circuit for converting parallel data converted into the wired communication protocol into serial data; and a second serial conversion circuit converting the parallel data converted into the wireless communication protocol into serial data. A serial conversion circuit and a serial data input from the second serial conversion circuit. Portable IC card reader-writer according to claim 3, characterized in that it comprises a modulation circuit for modulating the data. 5. A step of converting predetermined serial data input from a contact type IC card or a contact type IC card reader / writer via an interface into parallel data, and the converted parallel data into a wireless communication protocol. A step of converting, a step of converting the parallel data converted into the wireless communication protocol into serial data, a step of modulating the converted serial data, and a step of wirelessly modulating the modulated serial data via an antenna And a step of transmitting to an IC card reader / writer or a wireless IC card. 6. A step of demodulating predetermined serial data received from a wireless IC card reader / writer or a wireless IC card via an antenna, and a step of converting the demodulated serial data into parallel data. Converting the converted parallel data into a wired communication protocol; converting the parallel data converted into the wired communication protocol into serial data; and contacting the converted serial data via an interface. And a step of transmitting to an IC card or a contact type IC card reader / writer.