JP5838713B2 - IC chip, UIM, processing method in IC chip, IC chip processing program, and portable terminal - Google Patents

Description

  The present invention relates to a processing technique in an IC chip having a plurality of interfaces.

  IC cards are roughly classified into a type to which a contact type IC (Integrated Circuit) chip is applied and a type to which a non-contact type IC chip is applied. An IC card to which a contact type IC is applied is used for a credit card, a cash card or the like, and is connected to an IC chip via a contact interface such as an IC card reader / writer device (an IC card is inserted into the device). Data is being read and written. The non-contact type IC card is used for some ID cards (for example, entry / exit management cards) and traffic cards (for example, Suica (registered trademark)), and is a reader / writer device for non-contact type IC cards. The data is read from and written to the IC chip via.

  In recent years, in Japan, a non-contact communication coil (antenna) for communicating with a mobile phone with a non-contact IC chip reader / writer device, etc., and a microcomputer for processing non-contact communication protocols and non-contact applications In addition to line connection and packet connection, various services using a non-contact interface are provided. This mobile phone is equipped with a UIM (User Identity Module) which is a dedicated microcomputer for executing a contact application and a dedicated microcomputer for executing a non-contact application. Therefore, the mobile phone can simultaneously execute (function) the contact application and the contact application. Specifically, for example, the mobile phone simultaneously performs the incoming process to the mobile phone realized by executing the contact application and the gate passing process (entrance / exit management process) realized by executing the non-contact application. Is possible.

  On the other hand, mainly in Europe, UIM has existing non-contact communication coils provided in mobile terminals equipped with UIM, and non-contact communication protocols and microcomputers mainly responsible for processing non-contact applications. A method for managing a contactless application in addition to a contact application in the UIM by connecting to an interface different from the interface has been studied, and standardization of related technologies is being promoted. In this method, both the contact application and the non-contact application are stored in the UIM and share the hardware resources (CPU, storage device, various peripheral circuits) of the UIM (that is, processing in 1 Chip is executed). However, since these applications are integrated and stored in a removable UIM, there are advantages such as easy management and migration of applications (hereinafter referred to as NFC (Near Field Communication) method). ).

  As mentioned earlier, the NFC method has advantages such as cost reduction effect and easy management and migration of applications by storing application for contact and non-contact in UIM. Because it is necessary to accept application processing requests asynchronously from contact / non-contact depending on the usage status of the user, etc., contention of processing requests cannot be avoided with 1 Chip.

  For such a situation, in Patent Document 1, in the case of an IC card having a plurality of interfaces, when command reception occurs at another interface during execution of a command received from one interface, command processing being executed is performed. A method has been proposed in which a command received asynchronously on a plurality of interfaces is received without being missed by interrupting and performing command reception processing.

  Patent Document 2 discloses a technique for physically or logically separating the storage area of an IC card according to the execution state (introduction status) of a contact application and a non-contact application.

JP 2008-090800 A Japanese Patent No. 4231148

  By the way, the nonvolatile memory writing process, which is one of the processes performed inside the IC card such as the command process described above, takes a time of several msec until the process is completed. Are known. Further, there is a physical restriction that other information (data) stored in the nonvolatile memory cannot be read and written while the writing process is being performed on the nonvolatile memory.

  Specifically, as illustrated in FIG. 4, while the nonvolatile memory writing process is being performed as the process of the application A, the nonvolatile memory writing process cannot be performed as the process of the application B, and the memory It will be in the writing end waiting state. When the writing process of the nonvolatile memory by the application A is completed, the reading or writing process of the nonvolatile memory by the application B is started.

In the method described in Patent Document 1, when command reception occurs in another interface, the command processing being executed first is interrupted, but the command being executed first is, for example, AUTHENTICATE ( ETSI TS 102 221 11.1.16, JIS X 6306) When the update of the nonvolatile memory based on the command is executed, the update is interrupted while the nonvolatile memory is being updated. If the command of the processing content referring to the data stored in the nonvolatile memory is received from the contact interface side during the interruption, the data cannot be referred to and the command is executed. I couldn't.

  In addition, as a technique described in Patent Document 2, it is generally at the stage of manufacturing an IC card that the division mode of the storage area of the IC card can be determined. In this manufacturing stage, it is difficult to predict the execution state of the contact application and the non-contact application to determine the above-described division mode. Depending on the execution state, the divided storage area has insufficient storage capacity, and sufficient processing is performed. It is possible to assume a case that cannot be executed.

  Therefore, the present invention has been made in view of the above problems, and an IC chip, a processing method in an IC chip, a processing program for an IC chip, a portable terminal, and the like that process a command for executing a service at high speed and reliably are provided. The purpose is to provide.

In order to solve the above problem, the invention according to claim 1 has a plurality of interfaces, and receives data via the interfaces, and uses predetermined data stored in the first storage unit in a nonvolatile manner. An IC chip for processing a command for executing a service, a second storage unit used as a work area for processing data read from the first storage unit based on the command, and a power source When a command is received from any of the connection, reset signal, or the plurality of interfaces, data used for processing the command stored in the first storage unit is written into the second storage unit a data writing unit, wherein the data writing means, when the data used in the processing of the command to the second storage unit is written, the data is The identification information storage means for storing the identification information indicating that it has been written in the second storage unit and the type of the command in association with each other, and the command from any of the plurality of interfaces When receiving the identification information stored in the identification information storage means and stored in association with the type of the received command, the identification information by the determination means If a search is performed, a command for executing a predetermined service is processed using data used for processing the command stored in the second storage unit in association with the searched identification information. And a processing means .

  According to the present invention, since the same data as the data stored in the nonvolatile memory can be processed regardless of the access state to the nonvolatile memory, the command for executing the service can be processed quickly and reliably. .

According to a second aspect of the invention, an IC chip according to claim 1, when the identification information by the previous SL determining means is not searched, the processing of the command stored in the first storage unit It is characterized by comprising second data writing means for writing data to be used to the second storage unit.

The invention described in claim 3 is a UIM (User Identity Module) on which the IC chip according to claim 1 or 2 is mounted .

The invention described in claim 4 is a portable terminal equipped with the UIM described in claim 3 .

The invention according to claim 5 has a plurality of interfaces, and processes a command for executing a predetermined service using data stored in the first storage unit in a nonvolatile manner, which is received via the interfaces. A processing method in an IC chip including a second storage unit used as a work area for processing data read from the first storage unit based on the command, including a power connection, a reset signal, Or a data writing step of writing data used for processing the command stored in the first storage unit to the second storage unit when a command is received from any of the plurality of interfaces. When data used for processing the command is written in the second storage unit by the data writing step, the data is stored in the second storage unit. An identification information storage step of storing the identification information indicating that the information is written in the storage unit and the type of the command in association with each other in the second storage unit, and a command received from any of the plurality of interfaces The identification information stored in the identification information storage step and the identification information stored in association with the type of the received command is searched, and the identification information is searched by the determination step. A processing step of processing a command for executing a predetermined service using data used for processing of the command stored in the second storage unit in association with the searched identification information; It is characterized by having.

The invention according to claim 6 has a plurality of interfaces, and processes a command for executing a predetermined service using data stored in a nonvolatile manner in the first storage unit, which is received via the interfaces. A computer included in an IC chip including a second storage unit used as a work area for processing data read from the first storage unit based on the command is selected from any of the plurality of interfaces. from when a command is received, the first data used for stored process the command in the storage unit, the second writing data writing means in the storage unit, by the data writing means, the When data used for processing the command is written in the second storage unit, it indicates that the data has been written in the second storage unit An identification information storage unit that associates different information with the type of the command and stores the information in the second storage unit, and a command received from any of the plurality of interfaces, is stored by the identification information storage unit When the identification information is retrieved by the determination means, and when the identification information is retrieved by the determination means, the identification information that is stored in association with the type of the received command is included in the retrieved identification information. It is made to function as a processing means for processing a command for executing a predetermined service by using data used for processing the command stored in the second storage unit in association with the command .

The invention according to claim 7 has a plurality of interfaces, and contacts that process a command for executing a predetermined service using data stored in the first storage unit in a nonvolatile manner, received via the interfaces. In a portable terminal comprising a type IC chip and a controller capable of communicating with the IC chip via the first interface, the contact type IC chip is read from the first storage unit based on the command When a command is received from a second storage unit used as a work area for processing data and a power connection, a reset signal, or any of the plurality of interfaces, the command is stored in the first storage unit. the data used in the processing of the command, and a data writing means for writing in the second storage unit, the data writing means When data used for processing the command is written in the second storage unit, identification information indicating that the data is written in the second storage unit and the type of the command Identification information storage means for storing the information in the second storage unit in association with each other and identification information stored by the identification information storage means when a command is received from any of the plurality of interfaces, A determination unit that searches for the identification information stored in association with the type of the received command; and when the identification information is searched for by the determination unit, the identification information is correlated with the searched identification information. and processing means for processing a command to execute a predetermined service using the data used for the two said command stored in the storage unit of the processing, you comprising: a.

  As described above, according to the present invention, the same data as the data stored in the nonvolatile memory can be processed regardless of the access state of the nonvolatile memory. Can be processed.

It is a block diagram which shows the example of a schematic structure of the portable terminal which concerns on this embodiment. It is a block diagram which shows the example of a schematic structure of UIM13. 4 is a flowchart showing the operation of the mobile terminal 1. It is a conceptual diagram which shows the example of a process of the data memorize | stored in the conventional non-volatile memory.

[1. Overview of mobile terminal configuration and functions]
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The embodiment described below is an embodiment when the present invention is applied to a mobile terminal.

  First, with reference to FIG. 1, the configuration and functional overview of the mobile terminal according to the present embodiment will be described.

  FIG. 1 is a block diagram illustrating a schematic configuration example of a mobile terminal according to the present embodiment. As illustrated in FIG. 1, the mobile terminal 1 includes a controller 11, a CLF 12, a UIM 13, and the like that perform functions of the mobile terminal 1. Note that the mobile terminal 1 accesses a predetermined server by specifying, for example, operation keys, a display, a speaker, and a mobile communication unit (a general communication control function based on a W-CDMA or CDMA2000 communication method, URL). Mobile phone, PDA, and the like having a browser function for receiving predetermined information and a mailer function, etc.). In addition, since these functions in the portable terminal 1 are well-known, detailed description is abbreviate | omitted.

Although not shown, the controller 11 is a CPU (Central Processing Unit), a nonvolatile memory (such as a flash memory) that stores various programs and data, a RAM that temporarily stores data, and an I / O that serves as an interface with the UIM 13. It has a port. The controller 11 can communicate with the UIM 13 via an interface. And the controller 11 performs various processes according to the communication process (communication performed via a mobile communication network or the internet) of the portable terminal 1, and the operation instruction from the user of the portable terminal 1 via the operation key. In the course of such processing, the controller 11 performs, for example, communication processing (including incoming call processing) performed with the base station 3, services related to communication processing such as Web access and mail transmission / reception, other encryption processing and authentication. A command (signal) for executing a service such as processing (an example of a predetermined service of the present application) is transmitted to the UIM 13 via an interface (including a contact I / O port described later).

  In the present embodiment, a service (such as a service related to the communication process) that is executed based on command transmission / reception between the controller 11 and the UIM 13 is referred to as a contact service. A command for executing a contact service (for example, a data read command) is referred to as a contact command (see FIG. 1A). Note that transmission / reception of a contact command necessary for executing the contact service may be performed not only once but a plurality of times.

A CLF (Contactless Front End) 12 is a non-contact type IC chip that performs non-contact communication defined by the NFC standard (that is, adopts the NFC method), and stores a CPU, various programs, and data (not shown). A nonvolatile memory, a RAM that temporarily stores data, an I / O port (SWIO) that performs an interface with the UIM 13, and the like are provided. In CLF12 prescribed | regulated by this NFC specification, the communication system of FeliCa (trademark) is supported as Type-F in addition to the communication system of Type-A and Type-B. Such a CLF 12 is connected to an antenna 12a for transmitting and receiving various signals in accordance with the above communication method with the non-contact reader 2 in a non-contact field. When the user places the portable terminal 1 on the non-contact reader 2, the CLF 12 sends a command for executing a service (an example of a predetermined service of the present application) transmitted from the non-contact reader 2 to an interface (described later). (Including a non-contact I / O port).

  Examples of the services include prepaid cards and commuter passes for transportation facilities such as railways and buses, settlement services such as credit cards and electronic money, facility entrance / exit management, and the like.

  In the present embodiment, a service (such as the prepaid card described above) that is executed based on command transmission / reception between the CLF 12 and the contactless reader 2 is referred to as a contactless service. A command for executing the contactless service is referred to as a contactless command (see FIG. 1B). In addition, transmission / reception of the non-contact command necessary for executing the non-contact service may be performed not only once but a plurality of times.

  In addition, hereinafter, a simple command includes both the contact command and the non-contact command.

The UIM 13 is one of UICCs (Universal Integrated Circuit Cards), and is equipped with a contact IC chip whose functions are expanded based on a conventional SIM (Subscriber Identity Module) (ETSI TS 102 221, 613, etc.). Here, the configuration and functional overview of the UIM 13 will be described with reference to FIG. FIG. 2 is a block diagram illustrating a schematic configuration example of the UIM 13.

  As shown in FIG. 2, the UIM 13 includes an interface 21, a ROM (Read Only Memory) 22, an EEPROM 23, a RAM (Random Access Memory) 24, a CPU (Central Processing Unit) 25, and the like.

  The interface 21 functions as an example of a plurality of interfaces of the present application, and includes a contact I / O port responsible for an interface with the controller 11, a non-contact I / O port responsible for an interface with the CLF 12, and the like. . Note that SWP (Single Wire Protocol) is applied to the interface between the CLF 12 and the UIM 13.

  Various programs to be executed by the CPU 25 are stored in the ROM 22, and the CPU 25 controls the UIM 13 in an integrated manner based on this program and executes the operation indicated by the command.

  The programs stored in the ROM 22 include an operating system (hereinafter referred to as “OS”) that controls the overall operation of the UIM 13 as well as a non-contact interface application program (hereinafter referred to as a non-contact interface application program) that processes non-contact commands received from the CLF 12. And a contact interface application program for processing a contact command received from the controller 11 (hereinafter referred to as “contact application”). In the mobile terminal 1 according to the present embodiment, the contactless service is executed by the control of the contactless app, and the contact service is executed by the control of the contact app. Note that these programs stored in the ROM 22 may be stored in the EEPROM 23 described later.

  The EEPROM 23 is a kind of nonvolatile semiconductor memory, and is a PROM (Programmable Rom) that can erase data stored in a storage area and re-store it any number of times.

  Further, the EEPROM 23 functions as a first storage unit of the present application, and the data processed by the CPU 25 based on a command for executing a predetermined service under the control of the above-described apps (including contact apps and non-contact apps). (Hereinafter, simply referred to as “processing target data”) is stored.

Specifically, for example, in an application (an example of a non-contact application) that executes a prepaid card service (for example, Suica) for transportation such as railways and buses, as the processing target data, the non-contact reader 2 (PCD) and the CLF 12 (JISC) Initialized communication with JIS (JISC)
The system code of the parameter of the REQC command in X 6319) is stored.

  In addition, in a payment processing application (an example of a non-contact application) that executes a payment process, information generated at each stage of the settlement process (for example, information on a transaction amount determined in the settlement process) as processing target data And a personal identification number) are stored.

  Also, in a call processing application (an example of a contact application) that executes call processing, information corresponding to a telephone number of a caller (name, name, information registered in a so-called telephone directory of image data, etc.) as processing target data ) Is stored.

  The RAM 24 is a memory used as a work area for the CPU 25 to control the UIM 13 in an integrated manner.

  The RAM 24 functions as a second storage unit of the present application, and is used as a work area for processing data (including data processed by the CPU 25) read from the EEPROM 23 based on a command. .

  Further, the RAM 24 stores processing target data (such as the system code of the parameter of the above-mentioned REQC command).

  As will be described in detail later, the processing target data is stored in a predetermined storage area of the RAM 24 set in advance by the CPU 25 under the control of the OS, the non-contact application, or the contact application.

  The CPU 25 controls the overall operation of the UIM 13 based on the program as described above, and functions as a data writing unit, an identification information storage unit, an identification information determination unit, and a second data writing unit of the present application. It is supposed to be.

  Specifically, the CPU 25 as the data writing means is activated after the power supply is connected, the initialization process is performed by a reset signal, or the first command is received from any of the interfaces 21 In addition, the processing target data is written in the RAM 24.

  As described above, there is a physical restriction that the CPU 25 cannot read other information (data) stored in the EEPROM 23 while the writing process is being executed on the EEPROM 23 which is a nonvolatile memory. is there.

For example, when the CPU 25 is updating data stored in the non-volatile memory based on an AUTHENTICATE (ETSI TS 102 221 11.1.16, JIS X 6306) command as an example of a contact command, When the command of the processing content that refers to the data stored in the nonvolatile memory is further received from the interface 21, the CPU 25 cannot refer to the data.

Specifically, when the CPU 25 updates the data stored in the non-volatile memory based on the AUTHENTICATE (ETSI TS 102 221 11.1.16, JIS X 6306) command, the user turns the ticket gate of the transportation facility. Is passed (a function of a prepaid card service as an example of a non-contact service), the CPU 25 receives the above-described REQC command request in the initialization communication from the non-contact reader 2 during the update of the nonvolatile memory.

  Since the CPU 25 cannot refer to the system code of the parameter required for the response to the REQC command stored in the EEPROM 23, the initialization communication with the non-contact reader 2 cannot be established. As a result, the user cannot receive the prepaid card service.

  Furthermore, in Felica that has the function of a prepaid card for transportation such as railways and buses, it ends in a short time of about several hundred msec from the reception of an initial command (initialization process) to the end of a series of processes including authentication. Therefore, high-speed processing of the IC chip is required.

  Therefore, the CPU 25 writes the processing target data in the RAM 24 in advance before the command processing is executed, so that the CPU 25 stores the data in the RAM 24 even when the writing processing is executed on the EEPROM 23. Processing can be executed using the stored processing target data. Accordingly, the command for executing the service can be processed at high speed and with certainty, so that the entire service can be executed at high speed and with certainty.

  Before this command processing is executed, for example, when the power is connected to the mobile terminal 1 (for example, the power switch of the mobile terminal 1 is turned on) and the CPU 25 is activated (power connection), a reset signal is input. When the initialization process is executed, or when a command is first received from any of the interfaces 21, this is shown.

  In other words, the data to be processed is written into the RAM 24 before the writing process is executed on the EEPROM 23 based on the command process.

  More specifically, for example, since the UIM 13 includes a clock oscillation circuit therein, the CPU 25 starts operating when a power source is connected to the portable terminal 1. Immediately after the CPU 25 starts its operation, the CPU 25 writes the processing target data into the RAM 24.

  When the reset signal is input, the CPU 25 performs initialization processing and outputs an ATR signal (ISO / IEC7816-3 or the like). When the reset signal is input, the CPU 25 stores the processing target data in the RAM 24. Write to.

  Further, when the CPU 25 is in a command waiting state and receives a command for the first time from any of the interfaces 21, the CPU 25 writes processing target data into the RAM 24.

  The CPU 25 as the identification information storage means stores identification information indicating that the processing target data has been written in the RAM 24 when the processing target data is written in the RAM 24 by the CPU 25.

  As this identification information, a predetermined value may be written at a predetermined position in the RAM 24, or a CRC (Cyclic Redundancy Check) code or the like may be generated from the processing target data. In this case, it can be determined that the processing target data has been written when the data in the RAM has a specific value or when the CRC matches the expected value calculated from the processing target data.

  When a plurality of processing data is stored in the RAM 24, the processing target data can be arbitrarily set. For example, as data to be processed, predetermined data may be set for each application (for each command to be processed) and stored in the RAM 24, or a single set of predetermined applications may be set and stored. Also good.

  When a plurality of pieces of processing data are held in the RAM 24, the identification information stores the processing target data, the type of command that causes the CPU 25 to process the processing target data, and the type of application that processes the command in association with each other. Yes. Therefore, the CPU 25 can specify the processing target data corresponding to the command received from the interface 21 by referring to the identification information. Further, the CPU 25 can also specify the processing target data corresponding to the application that processes the command by referring to the identification information.

  Further, when receiving a command from any one of the interfaces 21, the CPU 25 as a means for determining the identification information searches the identification information stored in the RAM 24 stored in association with the command or determines whether or not there is processing target data. It comes to judge. If the presence of the identification information is confirmed or it is determined that there is processing target data, the CPU 25 uses the processing target data stored in the RAM 24 in association with the identification information to perform a predetermined service. It is designed to process commands that execute.

  In addition, when the CPU 25 as the second data writing means receives a command from any of the interfaces 21, the CPU 25 refers to the RAM 24, confirms the identification information stored in association with the command, and the identification information is When it is determined that the data to be processed is not found or the processing target data does not exist based on the identification information, the processing target data is written in the RAM 24.

[2. Operation of mobile terminal 1]
Next, the operation of the mobile terminal 1 will be described with reference to FIG.

  FIG. 3 is a flowchart showing the operation of the mobile terminal 1. Note that the operation of the mobile terminal 1 shown in FIG. 3 is performed by the CPU 25 using the mobile phone 1 when the user passes the ticket gate of the transportation facility (function of a prepaid card as an example of a contactless service). This is a form in which the CPU 25 receives a command from any of the interfaces 21 such as when a non-contact command is received, or when the CPU 25 receives an AUTHENTICATE command (an example of a contact command).

  As shown in FIG. 3, when receiving a command (step S1), the CPU 25 refers to the RAM 24 and searches for identification information stored in association with the command (step S2).

  When the identification information is retrieved (step S2: YES), the CPU 25 processes a command for executing a predetermined service using the processing target data stored in the RAM 24 in association with the retrieved identification information. (Step S3).

  Therefore, the CPU 25 can process the same data as the data stored in the non-volatile memory stored in the RAM 24 regardless of the access state to the EEPROM 23, so that the command for executing the service is processed at high speed and reliably. be able to.

  On the other hand, when the identification information is not retrieved (step S2: NO), the processing target data stored in the EEPROM 23 is written into the RAM 24 (step S4). Then, the CPU 25 stores identification information indicating that the processing target data has been written in the RAM 24 (step S5).

  In addition, embodiment described above does not limit the invention concerning a claim. And not all the combinations of the configurations described in the above embodiment are indispensable means for solving the problems of the invention.

  As described above, according to the present embodiment, the CPU 25 is configured to write the processing target data stored in the EEPROM 23 to the RAM 24 when a command is received from any of the interfaces 21. Regardless of the access state, the same data as the data stored in the nonvolatile memory stored in the RAM 24 can be processed, so that the command for executing the service can be processed at high speed and with certainty.

  In the above embodiment, the case where the present application is applied to the UIM mounted on the mobile terminal 1 has been described as an example. However, it is possible to connect with other mobile terminals using a plurality of protocols (for example, USB) via the interface. The present invention can also be applied to other portable terminals that can perform communication.

1 mobile terminal 2 contactless reader 3 base station 11 controller 12 CLF
13 UIM
21 Interface 22 ROM
23 EEPROM
24 RAM
25 CPU

Claims (7)

Has multiple interfaces,
An IC chip that processes a command to execute a predetermined service by using data stored in the first storage unit in a nonvolatile manner, received via the interface,
A second storage unit used as a work area for processing data read from the first storage unit based on the command;
When a command is received from any one of a power connection, a reset signal, and the plurality of interfaces, data used for processing the command stored in the first storage unit is written in the second storage unit. Data writing means for
When data used for processing the command is written in the second storage unit by the data writing unit, identification information indicating that the data has been written in the second storage unit And identification information storage means for storing the command type in association with the second storage unit,
Judgment to retrieve identification information stored by the identification information storage means and stored in association with the type of the received command when a command is received from any of the plurality of interfaces Means,
When identification information is retrieved by the determining means, a predetermined service is provided using data used for processing the command stored in the second storage unit in association with the retrieved identification information. Processing means for processing a command to be executed;
An IC chip comprising: The IC chip according to claim 1 ,
If that is not searched identification information by the previous SL determining means, the data used for processing of the command stored in the first storage unit, the second data writing means for writing in the second storage unit An IC chip comprising: A UIM (User Identity Module), wherein the IC chip according to claim 1 is mounted . A mobile terminal, wherein the UIM according to claim 3 is mounted . Has multiple interfaces,
A command for executing a predetermined service is processed using data stored in the first storage unit in a nonvolatile manner, which is received via the interface, and read from the first storage unit based on the command A processing method in an IC chip including a second storage unit used as a work area for processing data,
When a command is received from any one of a power connection, a reset signal, and the plurality of interfaces, data used for processing the command stored in the first storage unit is written in the second storage unit. Data writing process ,
When data used for processing the command is written in the second storage unit by the data writing step, identification information indicating that the data has been written in the second storage unit And an identification information storage step for storing the command type in association with the second storage unit,
When a command is received from any of the plurality of interfaces, a determination is made to search for the identification information stored in association with the type of the received command that is stored in the identification information storage step Process,
When the identification information is retrieved in the determination step, a predetermined service is provided using data used for processing the command stored in the second storage unit in association with the retrieved identification information. A processing step for processing a command to be executed;
A processing method characterized by comprising: Has multiple interfaces,
A command for executing a predetermined service is processed using data stored in the first storage unit in a nonvolatile manner, which is received via the interface, and read from the first storage unit based on the command A computer included in an IC chip including a second storage unit used as a work area for processing data;
A data writing means for writing data used for processing the command stored in the first storage unit to the second storage unit when a command is received from any of the plurality of interfaces;
When data used for processing the command is written in the second storage unit by the data writing unit, identification information indicating that the data has been written in the second storage unit And identification information storage means for storing the command type in association with the second storage unit,
Judgment to retrieve identification information stored by the identification information storage means and stored in association with the type of the received command when a command is received from any of the plurality of interfaces Means, and
When identification information is retrieved by the determining means, a predetermined service is provided using data used for processing the command stored in the second storage unit in association with the retrieved identification information. An IC chip processing program which functions as a processing means for processing a command to be executed . Has multiple interfaces,
A contact-type IC chip that processes a command to execute a predetermined service using data stored in the first storage unit in a nonvolatile manner received via the interface, and the IC chip and the first interface via the interface In a portable terminal equipped with a communicable controller,
The contact type IC chip is:
A second storage unit used as a work area for processing data read from the first storage unit based on the command;
When a command is received from any one of a power connection, a reset signal, and the plurality of interfaces, data used for processing the command stored in the first storage unit is written in the second storage unit. Data writing means for
When data used for processing the command is written in the second storage unit by the data writing unit, identification information indicating that the data has been written in the second storage unit And identification information storage means for storing the command type in association with the second storage unit,
Judgment to retrieve identification information stored by the identification information storage means and stored in association with the type of the received command when a command is received from any of the plurality of interfaces Means,
When identification information is retrieved by the determining means, a predetermined service is provided using data used for processing the command stored in the second storage unit in association with the retrieved identification information. Processing means for processing a command to be executed;
A portable terminal comprising:

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