JP2012093857A - Ic chip, memory initialization method for ic chip, processing program for ic chip, and portable terminal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an IC chip capable of efficiently initializing a memory without affecting processing operation that an interface performs.SOLUTION: There is provided the IC chip which has a plurality of interfaces and operates so that the respective interfaces asynchronously communicate with other communication terminals. The IC chip includes the memory which has a common area stored with common information used for operation processing of all the interfaces and dedicated areas each stored with information used only for operation processing of each interface; first detection means of detecting a start of one interface; second detection means of detecting operation states of the respective interfaces after the detected start of the interface; and initialization means of initializing the common area or a dedicated area of at least one interface according to the operation state of the interface.

Description

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

  In recent years, portable terminals provided with a UIM (User Identity Module) equipped with a contact IC (Integrated Circuit) chip have become widespread. Such a portable terminal is further equipped with a CLF (Contact Less Front-end) as a non-contact type IC chip, and by connecting the CLF to an interface different from the existing interface provided in the UIM, In addition to the contact application that operates on the existing interface, the non-contact application that operates on another interface is managed.

  The UIM has a built-in RAM and is initialized at the time of startup or the like. This RAM stores information necessary for operating the contact application and the non-contact application.

  In recent years, the memory capacity tends to increase due to the improvement of circuit integration, etc., and it is clear that it takes time to initialize the RAM as the RAM capacity increases. It may not be in time.

  As a method for resetting a memory card having a plurality of interfaces, Patent Document 1 discloses a method for selecting and resetting each of a plurality of interfaces.

JP 2008-21317 A

  According to the memory initialization method shown in Patent Document 1 described above, although it is possible to initialize each interface separately or all by selecting one interface, the startup state of other interfaces is observed. Therefore, when multiple interfaces operate almost simultaneously and asynchronously, that is, when the settlement operation is performed by the operation of the non-contact IC chip, for example, when the contact IC chip is operating, all the contents of the RAM are If it is initialized, information used in the operation of the contact IC chip will be erased during the settlement operation, which will affect the processing operation. Should be avoided in service.

  By the way, in such a portable terminal, since a plurality of interfaces operate asynchronously, different processes may occur almost simultaneously in two interfaces, that is, a conflict may occur. There is a need to provide a region.

  Therefore, the present invention has been made in view of such problems and the like, and an IC chip that can efficiently initialize a memory without affecting each processing operation performed using a plurality of interfaces. The purpose is to provide.

  In order to solve the above-described problem, the IC chip according to claim 1 is an IC chip that includes a plurality of interfaces, and each interface operates to asynchronously communicate with other communication terminals, and includes all the interfaces. A memory having a common area for storing common information used for the operation processing of the first, a dedicated area for storing information used only for the operation processing of each interface, and a first for detecting activation of one of the interfaces Detecting means, a second detecting means for detecting an operating state of each interface after activation of the detected interface, and a common area or a dedicated area of at least one interface according to the operating state of each interface. Initializing means for initializing.

  The IC chip according to claim 2 is an IC chip that includes a plurality of interfaces, each of which operates to asynchronously communicate with other communication terminals, and is used for operation processing of all the interfaces. A memory having a common area in which information is stored, a dedicated area in which information used only for operation processing of each interface is stored, and one privilege with a long time constraint on the initial response compared to other interfaces A first detection unit that detects activation of an interface or another interface; and when activation of a privileged interface is detected by the first detection unit, after the activation of the privileged interface, operation states of all interfaces are displayed. Second detection means for detecting, and as a result of the detection, all the interfaces Initialization means for initializing all of the common area and the dedicated area when activation of the interface is not detected, and initializing only the exclusive area of the privileged interface when activation of another interface is detected. It is characterized by.

  The memory initialization method for an IC chip according to claim 7, wherein a plurality of interfaces, a common area for storing common information used for operation processing of all the interfaces, and information used only for operation processing of each interface A memory initialization method in an IC chip in which each interface operates to asynchronously communicate with other communication terminals, and includes a dedicated area in which the interface is stored. A first detection step for detecting, a second detection step for detecting an operation state of each interface after activation of the detected interface, and the common region or at least one of the interfaces according to the operation state of each interface. An initialization step for initializing a dedicated area of the interface; And said that you are.

  The IC chip processing program according to claim 8 stores a plurality of interfaces, a common area where common information used for operation processing of all the interfaces is stored, and information used only for operation processing of each interface. And a memory included in the IC chip, each interface operating to communicate with other communication terminals asynchronously, and detecting a start of the one interface. A detection means, a second detection means for detecting an operation state of each interface after activation of the detected interface, and a common area or at least one dedicated area of the interface according to the operation state of each interface; It is characterized by functioning as initialization means for initialization.

  The portable terminal according to claim 9, a plurality of interfaces, a common area for storing common information used for operation processing of all the interfaces, and a dedicated area for storing information used only for operation processing of each interface A contact type IC chip comprising a memory having a region, a controller capable of communicating with the contact type IC chip via the first interface, and the contact type IC chip via the second interface. In a portable terminal comprising a non-contact type IC chip capable of communication, the contact type IC chip includes first detection means for detecting activation of one of the interfaces, and detection of each interface after activation of the detected interface. A second detecting means for detecting the operating state, and depending on the operating state of each interface; Characterized in that it comprises a, an initialization means for initializing a dedicated area of the common area or at least one said interface.

  According to the present invention, the region to be initialized is set and the initialization is executed so as not to affect the operation of the mobile terminal 1 according to the activation and operation state of the interface. It is possible to efficiently initialize the RAM without affecting the RAM.

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 conceptual diagram which shows the internal structure of RAM. 1 is a conceptual diagram illustrating an internal configuration of a RAM according to Embodiment 1. FIG. 3 is a table showing an example of RAM initialization processing according to Embodiment 1; FIG. 6 is a flowchart illustrating an operation processing example of a CPU according to the first embodiment. FIG. 10 is a conceptual diagram illustrating an internal configuration of a RAM according to a second embodiment. 10 is a table showing an example of RAM initialization processing according to the second embodiment.

  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. For example, a mobile phone, a PDA, or the like including operation keys, a display, a speaker, a mobile communication unit, and the like can be applied to the mobile terminal 1.

  Although not shown, the controller 11 serves as 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 a first interface with the UIM 13. An I / O port and the like are provided. The controller 11 can communicate with the UIM 13 via the first interface. And the controller 11 performs various processes according to the communication (communication performed via a mobile communication network and the internet) process of the portable terminal 1, and the operation instruction from the user of the portable terminal 1 via the operation key. In such a process, the controller 11 transmits a command signal related to, for example, an encryption process or an authentication process to the UIM 13 via the first interface. Further, the controller 11 is configured to transmit a reset signal for the first interface to the UIM 13, for example, when starting up or when a communication error occurs with the UIM 13.

  The CLF 12 is a non-contact IC chip that performs non-contact communication defined by the NFC standard. Although not shown, the CLF 12 includes a CPU, a nonvolatile memory that stores various programs and data, a RAM that temporarily stores data, and a UIM 13. An I / O port (SWIO) or the like serving as a second interface is provided. The CLF 12 is connected to an antenna 12a for transmitting and receiving various signals to and from a non-contact reader (not shown) in a non-contact field. When the user places the portable terminal 1 on a non-contact reader (not shown), a command signal related to a service request transmitted from the non-contact reader is transmitted to the UIM 13 via the second interface.

  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). The UIM 13 includes a CPU, a nonvolatile memory that stores various programs and data, a RAM that temporarily stores data, an I / O port that bears the first interface X with the controller 11, and a second interface with the CLF 12. The I / O port (C6) that carries the interface Y is provided. Note that SWP (Single Wire Protocol) is applied to the second interface Y between the CLF 12 and the UIM 13.

  Although not shown, the UIM 13 includes an I / O port (C4 or C8) that bears the third interface Z with an external storage medium such as a USB memory.

  The UIM 13 operates in accordance with various application programs in accordance with command signals transmitted from the controller 11 and the CLF 12, and performs predetermined processing.

  Further, for example, the CPU of the UIM 13 executes a reset process of the interface X by a reset signal from the controller 11. This reset processing includes, for example, UIM 13 clock setting, operation check of storage device (RAM, etc.) and peripheral circuits (random number generator, cryptographic coprocessor, etc.), initialization of storage device (RAM, etc.), stack pointer initialization And initial setting of peripheral circuits.

  The operation of the IC chip in the UIM 13 differs depending on the application (for example, for communication or electronic transaction) and the operation mode (contact or non-contact), and the basic operation based on such application and operation mode is a known technique. Detailed description will be omitted.

  By the way, like the portable terminal 1 shown in this embodiment, when a plurality of interfaces X to Z are provided and a plurality of processes operate simultaneously and asynchronously through the interfaces X to Z, they are necessary for each process. Information must be managed separately in the RAM.

  Therefore, as shown in FIG. 2, the RAM of the present embodiment includes a common area 16 in which common information used for operation processing of all the interfaces X to Z is stored, and operation processing of each interface. Dedicated area for storing dedicated information used only for this purpose (here, the area corresponding to the interface X corresponds to the privileged I / F dedicated area 17, the area corresponding to the interface Y corresponds to the second I / F dedicated area 18, and the interface Z) The area to be used is a third I / F dedicated area 19).

  In the future, initialization by reset processing will take time due to the increase in RAM capacity. For example, depending on the type of interface, there is a short time limit for initial response to respond to a reset signal. In some cases, the initial response may not be in time.

  Therefore, the CPU of the UIM 13 of the mobile terminal 1 shown in the present embodiment defines the area to be initialized according to the activation state and the operation state of a predetermined interface, so that the initial value of the RAM can be reduced without affecting the operation. Efficient. The activation state of the interface is determined, for example, by detecting the presence or absence of power input or signal input, and the operation state is determined by detecting the presence or absence of signal exchange.

  In addition, the time from when a predetermined signal is received to when an initial response is made is defined for each interface. When a plurality of interfaces are used, the time for the initial response is different for each interface. In the present embodiment, an interface having a long initial response time and a sufficient time constraint is set as a privileged interface (hereinafter referred to as “privileged I / F”). Depending on the operating state of the interface, the dedicated area corresponding to the other interface is initialized before the other interface is activated, so there is no need to initialize when the other interface is activated. It is possible to reduce the burden of initialization processing of other interfaces with a short initial response time and severe time constraints.

  Specifically, the CPU of the UIM 13 detects the activation state of each interface X to Z, detects the operation state of each interface X to Z after activation, and initializes the RAM as described below. After initialization, the presence / absence of initialization is set using a means such as a flag indicating that initialization has been completed.

  First, the CPU of the UIM 13 sets, for example, the interface X as the above-mentioned “privileged I / F”, and after the privileged I / F is activated, detects the operating state of all the interfaces X to Z, and all the interfaces X to Z When not operating, all the areas 16 to 19 in the RAM are initialized.

  Further, the CPU of the UIM 13 is configured so that the privileged I / F does not operate after the activation, and if any other interface Y or Z is operating, the privileged interface in the RAM Then, only the dedicated area 18 or 19 of the interface Y or Z that is not operating is initialized.

  In the initialization in the RAM after the activation of the privileged I / F with sufficient time constraints as described above, when all the interfaces X to Z are not operating, areas corresponding to all the interfaces X to Z ( Including the common area.) When other interfaces are operating, only the dedicated area corresponding to the non-operating interface is initialized, thereby affecting the operation of the mobile terminal 1. Therefore, it is possible to efficiently initialize the RAM.

  In addition, after starting any interface Y or Z other than the privileged I / F, the UIM 13 CPU starts first with the common area 16 in the RAM if all the interfaces X to Z are not operating. Only the dedicated area 18 or 19 of the interface is initialized.

  Furthermore, after starting any interface Y or Z other than the privileged I / F, the UIM 13 CPU starts first in the RAM if another interface that is different from the previously started interface is operating. Only the dedicated area 18 or 19 of the interface is initialized.

  As described above, in initialization of the RAM after activation of the interfaces other than the privileged I / F, when all the interfaces X to Z are not operating, only the common area and the exclusive area of the interface activated first are initialized. If other interface different from the previously activated interface is operating, only the dedicated area of the previously activated interface is initialized without affecting the operation of the mobile terminal 1. It is possible to reliably initialize a necessary area of the RAM.

  If any of the interfaces that have been activated is operating after the activation of any of the interfaces, the initialization process is not performed at all because it affects the operation process of the mobile terminal 1.

Example 1
Next, a specific RAM initialization process example will be described. First, an example of processing in a portable terminal having an ISO 7816 interface for operating a contact IC chip and an SWP interface connected by SWP / HCI communication for operating a non-contact IC chip will be described. FIG. 3 shows a structural example in the RAM.

  As shown in FIG. 3, the RAM according to the present embodiment has a common area 21 in which common information used for operation processing of the ISO 7816 interface and the SWP interface is stored, and dedicated information used only for operation processing of the ISO 7816 interface. Are stored in an ISO 7816 interface dedicated area 22 for storing information, and a SWP interface dedicated area 23 for storing dedicated information used only for SWP interface operation processing. Each area is initialized.

  Hereinafter, an example of processing for initializing each area according to the activation state of each interface will be described with reference to FIGS. FIG. 4 is a table showing a specific example of initialization processing in the RAM, and FIG. 5 is a flowchart showing an example of CPU operation processing in the first embodiment. In this embodiment, the privileged interface is an ISO7816 interface.

  First, as shown in FIG. 5, the CPU of the UIM 13 detects the activation state (electrical connection or the like) with each interface (step S1), and ends the process when activation of each interface is not detected.

  Here, in step S2, when activation at the ISO 7816 interface is detected due to power ON or the like (step S2: Yes), connection states (eg, presence / absence of signals) in all subsequent interfaces are detected (step S3).

  If the operation of all the interfaces is not detected in step S4 (step S4: Yes), as shown in FIG. 4, all areas 21 to 23 in the RAM are initialized (step S5), and the process Exit.

  In addition, in step S6, when the operation in the ISO 7816 interface is not detected and the operation in the SWP interface is detected (step S6: Yes), only the dedicated area 22 of the ISO 7816 interface is initialized as shown in FIG. (Step S7), and the process ends.

  If an operation in the ISO 7816 interface is detected (step S8), the operation processing of the mobile terminal 1 is affected. Therefore, the initialization of the RAM is performed as shown in FIG. 4 regardless of the operation in the SWP interface. The process is terminated without performing the process.

  On the other hand, in step S2, activation of the ISO 7816 interface cannot be detected (step S2: No), that is, in step S9, when activation of the SWP interface is detected by the operation of the non-contact IC chip, in all subsequent interfaces A connection state is detected (step S10).

  If the operation of all interfaces is not detected in step S11 (step S11: Yes), only the common area 21 and the dedicated area 23 of the SWP interface are initialized as shown in FIG. 4 (step S12). The process ends.

  In step S13, if an operation in the ISO 7816 interface is detected and no operation in the SWP interface is detected (step S13: Yes), only the dedicated area 23 of the SWP interface is initialized as shown in FIG. S14), the process is terminated.

  If an operation in the SWP interface is detected (step S15), the operation processing of the mobile terminal 1 is affected. Therefore, the initialization of the RAM is performed as shown in FIG. 4 regardless of the operation in the ISO 7816 interface. The process is terminated without performing the process.

  In this way, it is possible to efficiently initialize the necessary area of the RAM without affecting the operation of the mobile terminal 1.

-Example 2-
Next, an example of processing in a mobile terminal provided with a USB interface in addition to the above-described ISO 7816 interface and SWP interface will be described. FIG. 6 shows a structural example in the RAM, and FIG. 7 is a table showing a specific example of initialization processing in the RAM.

  Although not shown, the UIM 13 has eight external terminals on the contact board, the ISO 7816 interface is assigned to C1 to C3 and C5, the SWP interface is assigned to C6, and the USB interface is assigned to C4 or C8. In the portable terminal 1 configured as described above, each interface operates asynchronously and can be operated simultaneously.

  As shown in FIG. 6, the RAM of the present embodiment has a common area 26 for storing common information used for operation processing of the ISO 7816 interface, SWP interface, and USB interface, and for operation processing of the ISO 7816 interface. ISO7816 interface dedicated area 27 in which dedicated information used only for SWP interface is stored, SWP interface dedicated area 28 in which dedicated information used only for SWP interface operation processing is stored, and USB interface operation processing only Are divided into USB interface dedicated areas 29 in which dedicated information is stored, and each area in the RAM is initialized in accordance with the activation and operating state of each interface.

  Hereinafter, a processing example for initializing each area according to the activation state of each interface will be described with reference to FIG. In this embodiment, the privileged interface is an ISO7816 interface.

  As shown in FIG. 6, the CPU of the UIM 13 initializes all the areas 26 to 29 in the RAM when the operation of all the interfaces is not detected after the ISO 7816 interface is activated.

  Further, the CPU of the UIM 13, when the operation of the ISO 7816 interface is not detected and the operation of the USB interface or / and the SWP interface is detected after the ISO 7816 interface is activated, the dedicated area 27 of the interface that has not been activated, 28 or only the dedicated area 29 is initialized.

  Further, the CPU of the UIM 13 initializes the common area 26 and the dedicated area 28 or 29 of the previously activated interface when the operation of all the interfaces is not detected after the activation of the SWP interface or the USB interface.

  If the operation of at least one of the interfaces is detected after the SWP interface or the USB interface is activated, only the dedicated area 28 or 29 of the interface activated first is initialized.

  Note that, after the activation of any interface, if the operation of the interface whose activation has been detected first is detected, the operation processing of the mobile terminal 1 is affected, and therefore no initialization processing is performed.

  In this way, it is possible to efficiently initialize the necessary area of the RAM without affecting the operation of the mobile terminal 1.

  As described above, according to the above-described embodiment, the region to be initialized is set and the initialization is performed so as not to affect the operation of the mobile terminal 1 in accordance with the activation and operation state of the interface. Thus, the RAM can be efficiently initialized without affecting the operation. In particular, an interface with sufficient time constraints is set as a privileged I / F, and after activation of the privileged I / F, a dedicated area corresponding to the other interface is set in accordance with the operation state of the other interface. By configuring it so that it is initialized before the interface is activated, there is no need to initialize it when another interface is activated, for example, reducing the burden of initialization processing for other interfaces with strict time constraints. Can do.

1 mobile terminal 11 controller 12 CLF
13 UIM

Claims (9)

An IC chip having a plurality of interfaces, each interface operating asynchronously to communicate with other communication terminals,
A memory having a common area for storing common information used for operation processing of all the interfaces, and a dedicated area for storing information used only for operation processing of each interface;
First detecting means for detecting activation of one interface;
Second detection means for detecting an operating state of each interface after the detected interface is activated;
Initialization means for initializing the common area or the dedicated area of at least one interface according to the operating state of each interface;
An IC chip comprising: An IC chip having a plurality of interfaces, each interface operating asynchronously to communicate with other communication terminals,
A memory having a common area for storing common information used for operation processing of all the interfaces, and a dedicated area for storing information used only for operation processing of each interface;
One privileged interface having a long time constraint on the initial response compared to other interfaces, or first detection means for detecting activation of another interface;
Second activation means for detecting the operating state of all interfaces after activation of the privileged interface when activation of the privileged interface is detected by the first detection means;
If the activation of all interfaces is not detected as a result of the detection, all of the common area and dedicated area are initialized. If the activation of other interfaces is detected, only the privileged interface dedicated area is initialized. Initialization means to
An IC chip comprising: The second detection means includes
When activation of another interface is detected by the first detection means, after activation of the other interface, the operating state of all interfaces is detected,
The initialization means includes
As a result of the detection, when the operation of the privileged interface and the other interface activated first is not detected, only the common area and the dedicated area of the other interface activated first are initialized, and the operation of the privileged interface is detected 3. The IC chip according to claim 2, wherein, when an operation of another interface activated first is not detected, only a dedicated area of the other interface activated first is initialized. The initialization means includes
4. The IC chip according to claim 2, wherein when the operation of a privileged interface or another interface activated earlier is detected as a result of the detection, initialization processing is not performed. 5.   The IC chip according to any one of claims 1 to 4, wherein the IC chip is mounted on a UIM (User Identity Module).   The IC chip according to claim 5, wherein the UIM is attached to a mobile terminal. A memory having a plurality of interfaces, a common area for storing common information used for operation processing of all the interfaces, and a dedicated area for storing information used only for operation processing of each interface. A memory initialization method in an IC chip in which each interface operates to communicate with other communication terminals asynchronously,
A first detection step of detecting activation of one of the interfaces;
A second detection step of detecting an operating state of each interface after the detected interface is activated;
An initialization step of initializing the common area or at least one dedicated area of the interface according to the operating state of each interface;
A memory initialization method for an IC chip, comprising: A memory having a plurality of interfaces, a common area for storing common information used for operation processing of all the interfaces, and a dedicated area for storing information used only for operation processing of each interface. A computer included in an IC chip in which each interface operates to asynchronously communicate with other communication terminals,
First detecting means for detecting the activation of the one interface;
A second detecting means for detecting an operating state of each interface after the detected interface is activated; and
An IC chip processing program that functions as an initialization unit that initializes the common area or at least one dedicated area of the interface according to the operating state of each interface. A memory having a plurality of interfaces, a common area for storing common information used for operation processing of all the interfaces, and a dedicated area for storing information used only for operation processing of each interface. A contact IC chip, a controller capable of communicating with the contact IC chip via the first interface, a non-contact IC chip capable of communicating via the contact IC chip and the second interface, In a mobile terminal comprising:
The contact type IC chip is:
First detecting means for detecting activation of one of the interfaces;
Second detection means for detecting an operating state of each interface after the detected interface is activated;
Initialization means for initializing the common area or at least one dedicated area of the interface according to the operating state of each interface;
A portable terminal characterized by comprising:

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