JP4500062B2 - Information recording medium - Google Patents

Description

  The present invention relates to an information recording medium having a contact interface and a non-contact interface, and one of which can be selected.

As a conventional information recording medium, there is an IC card incorporating an IC memory or the like. In the conventional IC card, in order to transmit / receive data, power, etc. between the external device and the IC card, the IC card has a contact method in which the external contact provided on the surface of the IC card is brought into contact with the contact of the external device. Some have both a non-contact method using a built-in antenna. Examples of such an IC card are those described in Patent Document 1 and Patent Document 2, for example.
JP 60-179891 A JP-A-7-239931

  By the way, in a conventional IC card having an external contact and an antenna, a contact-type external processing device that is an external device that transmits and receives using the external contact and a non-contact external that is an external device that transmits and receives radio waves using the antenna If the processing device is in close proximity to each other and you attempt to send and receive data with the contact-type external processing device, when the IC card enters the send / receive range of the non-contact type external processing device, The IC card has started data transmission / reception with the non-contact type external processing device. When the IC card is set in the contact-type external processing device in that state, an electric signal such as a reset signal is given to the IC card from the external contact. As a result, the IC card is interrupted in the middle of the transmission / reception operation with the non-contact type external processing device, causing a response abnormality. Then, the contact-type external processing device and the non-contact-type external processing device give the reset signal to the IC card, which causes a malfunction.

  Further, in the case of performing transmission / reception in a non-contact manner, it is conceivable that when the writing process is performed on the information recording area of the IC card, the IC card is out of the transmission / reception range of the external processing device. In this case, the rewriting process is interrupted in the middle, and the transmitted / received data may be destroyed.

  The present invention has been made under such a background. In an information recording medium and an information recording medium IC module provided with an external contact and an antenna, transmission / reception with an external device is made safer and more reliable. An object of the present invention is to provide an information recording medium that can be used.

In order to solve the above-described problems, the present invention provides a rewritable information storage area for holding data and a voltage supply from a contact-type external processing device via an external connection terminal, and transmission / reception of information a contact-type interface, a contactless interface for transmitting and receiving information with supplied voltage from the non-contact type external processing device via the antenna unit, a first voltage supplied via the contact interface Alternatively , using the second voltage supplied via the non-contact interface, the contact interface is selected when the level of the first voltage is a predetermined level, and the first voltage When the level is not the determined level, the contactless interface is selected, and identification data indicating the selection result is stored. An interface determination means for temporarily holding the stage, when the identification data in the memory means by said interface determination means is held, and executes the instructions received through the interface to which the identification data indicates, the instruction And a control means for accessing the information storage area according to the information storage medium.

In another preferred embodiment, the control means permits rewriting and reading processing for all areas in the information storage area for the command received via the contact interface, and the non-contact interface is For the command received through the rewriting and reading process, a part of the information storage area may be prohibited.

  In a preferred embodiment, the above-described information recording medium is an IC card.

  As described above, according to the information storage medium of the present invention, the rewritable information storage area for holding data, the command processing means for executing the command received from the external processing device, and the contact type communication means are provided. A contact-type external processing device having a contact-type interface for transmitting / receiving information and / or transmitting energy via an external connection terminal, and a non-contact-type external processing device having a non-contact type communication means and information via an antenna unit. In the information recording medium comprising a non-contact interface for transmitting / receiving and / or transmitting energy, the level of the voltage received from the external connection terminal and the level of the voltage received from the antenna unit of the non-contact interface Compare and select one of the interfaces according to the comparison result to show the selected interface. An interface determination unit for holding information, and the instruction processing unit continues receiving the command through the interface indicated by the held selection result after the selection result is held by the interface determination unit; Since the received command is executed, even if the non-contact type external processing device approaches the information storage medium while the information storage medium is transmitting / receiving to / from the contact type external processing device, the contact type external processing device To provide an information recording medium that can prevent the transmission / reception with the external device from being affected by the radio waves of the non-contact type external processing device, and can make the transmission / reception with the external device safer and more reliable. Can do.

  Further, according to the present invention, in response to a command received from the antenna unit by the memory control unit, the data rewriting process to the information storage area is prohibited, so that the information recording medium moves and the non-contact external processing device When it goes out of the transmission / reception range by radio waves, it is possible to prevent destruction of recorded data due to interruption of the writing process in the middle, and it is possible to provide a safer and more reliable information recording medium.

Embodiments of the present invention will be described below with reference to the drawings.
A: Configuration of the embodiment

  FIG. 1 is a block diagram showing an information recording medium according to an embodiment of the present invention. In the figure, an information recording medium 10 is a so-called IC card. The external connection terminal 11 is an electric signal or power terminal that is electrically connected to a contact-type external processing device and becomes a path for data and the like, and is a power supply voltage supply terminal 11a, a clock frequency The terminal 11b includes a supply terminal 11b, a reset signal supply terminal 11c, a data transmission / reception terminal 11d, and a ground terminal 11e. The antenna unit 12 transmits and receives an electromagnetic wave serving as a communication medium for a non-contact type external processing device. The antenna unit 12a for supplying a power supply voltage and an operating clock frequency, a data receiving antenna unit 12b, and a data transmitting unit. It consists of an antenna part 12c. The power supply circuit 13 generates a power supply voltage and an operating frequency. The receiving circuit 14 converts the received analog data into digital data. In contrast to the reception circuit 14, the transmission circuit 15 converts digital data into analog data and outputs the analog data to the transmission antenna unit 12c.

  Here, the antenna unit 12 is not limited to a coil-shaped antenna as shown in FIG. For example, a structure in which a transformer is divided into two parts, etc. that transmit information etc. by electromagnetic coupling, a thing that transmits information etc. by microwave using a microstrip antenna, etc., a cored coil, etc. An antenna that transmits information by electromagnetic induction can be used as the antenna unit 12.

  In FIG. 1, the antenna unit 12 includes three coils. However, the present invention is not limited to this. For example, the antenna unit 12a for supplying power supply voltage and operation clock frequency, and the antenna unit for receiving data are provided. 12b and the data transmission antenna unit 12c may be integrated into one coil. In this respect as well, the structure differs depending on each transmission method, and a structure corresponding to each transmission method can be selected as the antenna unit 12.

  The PROM 16 is a storage unit that stores a program for processing a command received from an external processing device. The RAM 17 is a storage means for temporarily saving data for processing information and instructions of the information processing medium 10. The memory 18 is an information storage area for storing unique data and rewritable data regarding the information processing medium 10. The control unit 20 controls the operation of the entire information processing medium so as to execute processing for a command received from the external processing device.

  Here, the VCC level confirmation port 22 is a port for detecting the level of each power supply voltage VCC supplied from the power supply voltage supply terminal 11a and the operation clock frequency supply antenna section 12a. The VCC level confirmation port 22 includes a port 1 for detecting the level of the power supply voltage VCC supplied from the power supply voltage supply terminal 11a, and a power supply voltage VCC supplied from the operation clock frequency supply antenna section 12a. It consists of port 2 for detecting the level. The level of the power supply voltage VCC is generally about 0 volts at the low level and about 3 or 5 volts at the high level.

  The interface determination means 23 also detects the level of the power supply voltage VCC supplied from the power supply voltage supply terminal 11a detected at the VCC level confirmation port 22 and the level of the power supply voltage VCC supplied from the operation clock frequency supply antenna section 12a. And the interface with the higher level is selected and the selection result is retained. The selector means 25 causes the RAM 17 to hold identification data for the interface held by the interface determination means 23, and one of the contact-type interface 21 and the non-contact-type interface 24 based on the identification data. Only activate. The command processing means 26 processes a command block that is an instruction received from the interface selected by the selector means 25.

  Furthermore, the rewrite control means 28 controls the writing to the memory 18 generated in the command processing means 26 separately for the contact type interface and the non-contact type interface. In addition, the memory area control unit 27 determines an area that can be accessed in the case of the contact-type interface and the case of the non-contact-type interface in response to a write / read request to the memory 18 generated in the command processing unit 26. Distinguish and control.

B: Operation of Embodiment Next, the operation of the information storage medium having the above configuration will be described.
FIG. 2 is a flowchart showing the operation of the information storage medium. First, the control unit 20 detects the level of the power supply voltage VCC supplied from the contact-type external processing device via the power supply voltage supply terminal 11a at the power supply voltage level confirmation port 22 (S11). Then, the interface determination unit 23 determines whether or not the level (port 1) of the power supply voltage supply terminal 11a detected by the power supply voltage level confirmation port 22 is high (S12).

  Here, when the level of the port 1 is the High level, the interface determination unit 23 selects the contact type interface and holds the selection result (S13). The interface determination unit 23 stores the identification data of the selected contact type interface in the RAM 17 (S14).

Thereafter, the selector means 25 activates only the contact-type interface 21 based on the interface identification data stored in the RAM 17 (S15). Then, the command processing means 26 sends the initial data to the contact type external processing device via the contact type interface 21 (S16).
Thereafter, the command processing means 26 receives the command block via the contact interface 21 selected by the selector means 25 (S17). Then, the command processing means 26 performs processing for the received command (S18). Then, the command processing means 26 sends the processing result as a response block to the contact-type external processing device (S19).

  On the other hand, when the level of the power supply voltage VCC supplied from the power supply voltage supply terminal 11a is not the high level in step 12, the interface determination means 23 selects a non-contact type interface and holds this result (S20). . Thereafter, transmission / reception is performed via the non-contact interface 24 (S14 to S19).

  In the above-described operation, in step 12, the interface to be selected is determined based on whether or not the level of the power supply voltage VCC of the port 1 is the high level. However, the present invention is not limited to this, and the level of the power supply voltage VCC is high. If the potential of the power supply voltage supply terminal 11a and the potential of the antenna unit 12a become substantially the same state at the same time, the contact type interface may be preferentially selected. Good.

  As a result, the information storage medium can be contacted even when the information recording medium is within the transmission / reception range of the non-contact external processing device while the information storage medium is transmitting / receiving to / from the contact external processing device. Since only the expression interface 21 is in an active state and the non-contact interface 24 is in a prohibited state, transmission and reception with the contact-type external processing device is prevented from being affected by radio waves from the non-contact-type external processing device. It is possible to make transmission / reception with an external device safer and more reliable.

  Also, in this information storage medium, the contact type external processing device and the non-contact type external processing device exist in close proximity by the interface determination means preferentially selecting the contact type interface over the non-contact type interface. If you want to send / receive data to / from a contact-type external processing device, send / receive to / from the contact-type external processing device is selected even if this information storage medium is in the transmission / reception range of the non-contact type external processing device. Therefore, a desired interface can be selected with certainty, and the occurrence of malfunction due to competition between the contact-type and non-contact-type interfaces can be suppressed.

C: Modified Example FIG. 3 is a flowchart showing the operation of the information recording medium which is a modified example of the above-described embodiment. This flowchart specifically shows the command processing in step 18 in the flowchart shown in FIG.

  First, the command processing means 26 receives a command block via the interface selected by the selector means 25, and if the command includes a data rewrite process for the memory 18 (S31), the rewrite control means. 28, the identification data for the selected interface is read from the RAM 17 (S32).

  Here, the rewrite control means 28 determines whether or not the identification data indicates a non-contact type interface (S33). If the identification data indicates a non-contact type interface, rewrite processing for the memory 18 is performed. It is prohibited (S34). Then, the rewrite control means 28 sets an error response (S35) and ends the command processing.

  On the other hand, if the identification data indicates a contact type interface in step 33, the rewrite control means 28 executes a rewrite process on the memory 18 (S36). Then, the rewrite control means 28 sets a response block (S37) and ends the command processing.

  As described above, in the present embodiment, the rewrite control unit 28 permits the rewrite processing to the memory 18 when processing the command block via the contact interface 21. On the other hand, when a command block is processed via the non-contact interface 24, rewriting processing for the memory 18 is prohibited.

This is because when the information recording medium uses a contact type interface, the information storage medium is mechanically held by the contact type external processing device and is stably supplied with power. 18 is permitted to be rewritten.
On the other hand, when processing a command block via the non-contact type interface 24, the information storage medium may go out of the transmission / reception range by radio waves of the non-contact type external processing device, and the power supply is unstable. Therefore, rewriting processing for the memory 18 is prohibited.

  As a result, the present embodiment prevents destruction of recorded data due to the writing process being interrupted when the information recording medium moves and goes out of the transmission / reception range by the radio waves of the non-contact external processing device. Thus, a safer and more reliable information recording medium can be provided.

  FIG. 4 is a flowchart showing the operation of an information recording medium which is another modification. This flowchart specifically shows the command processing in step 18 in the flowchart shown in FIG.

  First, the command processing means 26 receives a command block via the interface selected by the selector means 25, and if the command includes data rewriting and reading processing to the memory 18 (S41), the memory It is determined whether or not the process is for the memory 18b using the area control means 27 (S42).

  If the memory area control means 27 determines that the process is for the memory 18b, it reads the identification data of the selected interface from the RAM 17 (S43). Then, it is determined whether or not the identification data indicates a non-contact type interface (S44). If the identification data indicates a non-contact type interface, rewriting and reading processing for the memory 18b is prohibited (S45). . Then, the memory area control means 27 sets an error response (S46) and ends the command processing.

  On the other hand, if it is determined in step 42 that the processing is not for the memory 18b, or if the identification data indicates a contact type interface in step 44, the memory area control means 27 executes rewriting and reading processing for the memory 18a. (S47). Then, the memory area control means 27 sets a response block (S48) and ends the command processing.

  As described above, in the present embodiment, when processing the command block via the contact-type interface 21, the memory area control means 27 holds the information storage medium mechanically held in the contact-type external processing device. Since this is clear and secure in terms of security, rewrite and read processing is permitted for the entire memory. On the other hand, when a command block is processed via the non-contact type interface 24, a plurality of other information recording media can be transmitted and received as long as they are within a transmission / reception range by radio waves of the non-contact type external processing device. Therefore, rewriting and reading processing for the memory 18b, which is a partial area of the memory 18, is prohibited.

  As a result, the present embodiment prohibits rewriting and reading processing to and from the memory using a non-contact interface for a partial area of the memory, so that it is possible to provide a more secure information recording medium.

  FIG. 5 is a back view showing an information recording medium IC module 50 which is a modified example of the structure with respect to the above-described embodiment. The information recording medium IC module 50 is a module incorporated in an IC card having an external contact serving as a contact interface and an antenna serving as a non-contact interface.

  In the information recording medium IC module 50, the IC chip 52 is connected by wire bonding 53 to a through hole 58 that electrically connects the terminal 61 on the front surface of the information recording medium IC module 50 to the back surface thereof. . In addition, a molded portion formed by molding a portion of the pattern 56 on the substrate formed for connection to the antenna portion 57 where the IC chip side and the IC chip 52 are connected by wire bonding 53 with a non-conductive protective resin. An antenna portion 57 is disposed around 59.

  As a result, according to the present embodiment, since the antenna portion 57 is arranged around the molded IC chip 52, the physical strength with respect to the information recording medium IC module 50 is increased, and the conventional manufacturing line is improved. The IC module for the information recording medium can be manufactured by using the IC card, and the manufacturing cost can be reduced to the level of a conventional IC card. The IC card is inexpensive, has high mechanical strength, and has external contacts and an antenna portion. Can be provided.

  FIG. 6 is a sectional view showing the information recording medium IC module shown in FIG. 5 and an IC card on which the information recording medium IC module is installed. In this embodiment, an adhesive layer 63 is provided in the cavity 62 of the IC card 64, and the information recording medium IC module 50 is bonded to the IC card 64.

  FIG. 7 is a back view showing an information recording medium IC module having another structure according to this embodiment. In this figure, an IC chip 52 is connected by wire bonding 53 to a pattern 56 extending from a through hole 58 that electrically connects a terminal 61 on the surface of the IC module 50 for information recording medium and the back surface of the module. . Further, the IC chip 52 is connected by wire bonding 53 on the IC chip 52 side of the pattern 56 on the substrate formed for connection to the antenna portion 57. The antenna unit 57 is connected to the connection pattern 56 of the antenna unit 57. Here, the antenna portion 57 is covered with a non-conductive coating except for the connecting portion, or the insulating coating 55 is provided on the surface of the pattern 56 where the pattern 56 and the antenna portion 57 are in contact with each other. deep. In the information recording medium IC module 50, the portion including the pattern 56 and the antenna portion 57 is molded with a non-conductive protective resin to form a mold portion 59.

  FIG. 8 is a sectional view showing the information recording medium IC module shown in FIG. 7 and an IC card on which the information recording medium IC module is installed. In this embodiment, an adhesive layer 63 is provided in the cavity 62 of the IC card 64, and the information recording medium IC module 50 is bonded to the IC card 64.

  FIG. 9 is a cross-sectional view showing an information recording medium IC module having another structure according to the present embodiment and an IC card on which the information recording medium IC module is installed. In this figure, the point that the adhesive layer 63 is provided in the cavity 62 of the IC card 64 and the information recording medium IC module 50 is bonded to the IC card 64 is the same as in the above embodiment.

  However, in this embodiment, in the information recording medium IC module 50, the antenna conductors of the antenna portion 57 are bundled, and the antenna forms a hollow cylinder or a hollow prism. Then, one surface of the antenna portion 57 having a cylindrical or prismatic shape is bonded to the back surface of the substrate 60 of the information recording medium IC module 50 by the adhesive layer 63, and the other surface of the antenna portion 57 is connected to the cavity portion of the IC card 64. The adhesive layer 63 is used for bonding. In addition, a mold part 59 in which the periphery including the IC chip 52 is molded with a non-conductive protective resin is arranged in a hollow part of a cylinder or a prism formed by the antenna part 57. When the IC module 60 for information recording medium is disposed in the cavity 62 portion of the IC card 64, the mold portion 59 has a shape such that the mold portion 59 does not contact the bottom surface of the cavity 62 of the IC card 64. .

  Thus, according to the present embodiment, the antenna portion 57 in which the conductors are bundled serves as a spring, so that mechanical stress on the IC card 64 and the information recording medium IC module 50 can be reduced.

  FIG. 10 is a rear view showing an information recording medium IC module having another structure according to this embodiment. In this figure, on the back surface of the module substrate 60, a mold part 59 is formed in which the periphery including the antenna part 65 and the IC chip 52 formed by a pattern is molded with a non-conductive protective resin.

  FIG. 11 is a sectional view showing the information recording medium IC module shown in FIG. 10 and an IC card on which the information recording medium IC module is installed. Also in this embodiment, the adhesive layer 63 is provided in the cavity 62 of the IC card 64, and the information recording medium IC module 50 is bonded to the IC card 64.

It is a block diagram which shows the structure of the information recording medium by embodiment of this invention. It is a flowchart which shows operation | movement of the selector function in the embodiment. It is a flowchart which shows operation | movement of the rewriting control function in the same embodiment. It is a flowchart which shows operation | movement of the memory area control function in the same embodiment. It is a back view of the IC module for information recording media which shows the modification about the structure in the embodiment. It is sectional drawing which shows the IC card in which the IC module for information recording media shown in FIG. 5 and the IC module for information recording media are installed. It is a back view which shows the IC module for information recording media of the other structure in the embodiment. It is sectional drawing which shows the IC card in which the IC module for information recording media shown in FIG. 7 and the IC module for information recording media are installed. It is sectional drawing which shows the IC card in which the IC module for information recording media of the other structure in the embodiment and the IC module for information recording media are installed. It is a back view which shows the IC module for information recording media of the other structure in the embodiment. It is sectional drawing which shows the IC card in which the IC module for information recording media shown in FIG. 10 and the IC module for information recording media are installed.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Information recording medium, 11 ... External connection terminal, 12 ... Antenna part, 13 ... Power supply circuit, 14 ... Reception circuit, 15 ... Transmission circuit, 16 ... PROM, 17 ... RAM, 18 ... Memory, 20 ... Control part, 22 ... VCC level confirmation port, 23 ... interface determination means, 25 ... selector means, 26 ... command processing means, 27 ... memory area control means, 28 ... rewrite control means.

Claims (3)

A rewritable information storage area for holding data;
A contact-type interface for receiving voltage from a contact-type external processing device via an external connection terminal and transmitting / receiving information; and
A non-contact interface for receiving and supplying voltage from the non-contact external processing device via the antenna unit, and for transmitting and receiving information;
When the level of the first voltage is a predetermined level using the first voltage supplied via the contact-type interface or the second voltage supplied via the non-contact-type interface. An interface that selects the contact-type interface, selects the non-contact-type interface when the level of the first voltage is not the determined level, and temporarily holds identification data indicating the selection result in a storage unit A confirmation means;
Control means for executing an instruction received via the interface indicated by the identification data and accessing the information storage area according to the instruction when identification data is held in the storage means by the interface determination means An information recording medium comprising: The information recording medium according to claim 1,
The control means permits rewriting and reading processing for all areas in the information storage area for the command received via the contact type interface, and for the command received via the non-contact type interface. Is an information recording medium for prohibiting rewriting and reading processing for a part of the information storage area. The information recording medium according to claim 1 or 2 ,
The information recording medium is an IC card.

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