JP2003331240A - Ic card and its control method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an IC card having a plurality of function units capable of preventing collision of signals to a host, and maintaining high responsiveness to the host of all the function units or a specific function unit, and its control method. <P>SOLUTION: In this IC card, an arrangement part is provided between each input/output part and the host. The arrangement part distributes commands from the host to processable function units, arranges processing results of respective function units, and returns them to the host. In addition, respective input/ output parts are connected, and thereby the input/output parts adjust mutually, and return the processing result of the processable function unit to the host. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an IC card and its control method.

[0002]

2. Description of the Related Art In a conventional system, a plurality of different functional modules are connected to different input / output units of a host. In a system in which such an IC card is connected to a host, the number of usable IC cards is limited to the number of input / output units of the host or less. Therefore, many functional modules cannot be used at once. In addition, if a host is provided with a large number of input / output units, it will hinder the miniaturization of the host. Therefore, by connecting the input / output buses of a plurality of functional modules in parallel, an IC card was created in which a plurality of functional modules can be used simultaneously by using one input / output unit of the host.

A conventional IC card will be described with reference to FIG. FIG. 12 is a block diagram of a conventional master / slave type IC card system. Reference numeral 101 is a host (master), and 1211 is an IC card. Host 101
It has an input / output unit 102. Also, the IC card 1211
Has functional units 113 and 114 (slaves). The functional unit 113 includes an input / output unit 121 and a control unit 12.
2. The functional operation unit 123 is included. Similarly, functional unit 1
Reference numeral 14 is an input / output unit 124, a control unit 125, and a functional operation unit 12.
Have six. A command addressed to one IC card is transmitted to all the functional units mounted on the IC card. In such a case, for example, the types of commands received for each functional unit are limited and assigned. When a command other than the command to which the functional unit is assigned is input, the command is judged to be a command addressed to another functional unit and does not respond. This maintains the communication order between the host and the plurality of functional units.

Next, the data flow of the conventional IC card will be described. Commands from the host 101 to the plurality of functional units 113 and 114 are input to the IC card 1211 from the input / output unit 102 of the host 101. The command input to the IC card 1211 is transmitted to both the functional units 113 and 114. In the functional unit, the command is first input to the input / output units 121 and 124.
The input / output units 121 and 124 determine, based on information such as a command number included in the input command, whether or not the input command can be processed by the functional unit (the same applies to the conventional example and all embodiments). ).

The command is, for example, a command that cannot be processed, and I
If the C card is in the second mode, the input / output unit 12
1, 124 immediately return a response. When the command is, for example, a command for setting the input / output unit, the input / output units 121 and 124
Returns a response immediately. The command is, for example, the functional operation unit 1
In the case of setting commands of 23 and 126, the input / output unit 121,
124 transmits the command to the control units 122 and 125. The control units 122 and 125 set the functional operation unit according to the command,
A response is returned via the input / output units 121 and 124.
The command is, for example, the functional operation unit 123, 126 (for example, RAM
And ), The input / output units 121 and 124 transmit the commands to the functional operation units 123 and 126 via the control units 122 and 125. The functional operation units 123 and 126 return responses (including data read from the RAM) via the control units 122 and 125 and the input / output units 121 and 124. Finally host 101
Receives the response output from the IC card 1211.

If one command is sent to a plurality of functional units and the functional units synchronously send back the same response (for example, "ACK") (for example, synchronous transmission), the host has a plurality of commands. The response transmitted from the functional unit can be read. What is the first mode?
If you receive a command that cannot be processed, no error information is returned,
This is a mode for storing information that a command that cannot be processed is received. The second mode is a mode in which an error is returned as soon as a command that cannot be processed is received.

However, when a plurality of functional units respond to one command and the contents of the responses are different from each other, the responses from the plurality of functional units interfere with each other and the host cannot read those responses. . For example, one IC
When a command that can be processed by only one of the plurality of functional units on the card is input (a functional unit that cannot process the command also responds to the command).
The functional unit that can process the command returns "ACK", and the other functional units return "NAK". Host is 2
The response cannot be read because a signal including two responses (ACK and NAK) is input (for example, an AND signal of two responses). Further, even if a command that can be processed by all the functional units is input, the processing result may be different, which causes confusion in the host.

[0008]

In the conventional IC card, for example, one command is transmitted from the host to a plurality of functional units, and the plurality of functional units return a plurality of different processing results in response to the command and the host returns. Sometimes caused confusion. SUMMARY OF THE INVENTION It is an object of the present invention to solve the above problems and provide an IC card that returns one correct processing result to a host without signal collision and a control method thereof. It is an object of the present invention to provide an IC card that transmits information transmitted from the outside to each functional unit by an optimal method according to a plurality of modes having different response methods, and a control method thereof.

[0009]

In order to solve the above problems, the present invention has the following constitution. According to a first aspect of the present invention, a plurality of functional units each having an input / output unit, a control unit for inputting / outputting information through the input / output unit, and a functional operation unit that operates under the control of the control unit, and externally Input the transmitted information, distribute the information to the input / output unit of the functional unit according to the destination or contents, and transmit the information, input the information transmitted from the input / output unit of the functional unit, and externally An arbitration unit that outputs that information,
It is an IC card characterized by having.

The invention according to claim 2 has a first function, which has an input / output unit, a control unit for inputting / outputting information through the input / output unit, and a functional operation unit controlled and operated by the control unit. If the information transmitted from the outside is addressed to the first functional unit, the input / output unit of the first functional unit has a plurality of functional units including units. A first input / output unit for transmitting information to the control unit of the functional unit and transmitting information to the outside, and if the information transmitted from the outside is information addressed to a functional unit other than the first functional unit, A first arbitration unit that transmits information to the second input / output unit and transmits information input by the second input / output unit to the outside, and the information transmitted from the first arbitration unit to the first arbitration unit. Functional units other than And a second input / output unit that transmits information to the input / output unit and receives information transmitted from the input / output unit of a functional unit other than the first functional unit. Is.

According to a third aspect of the present invention, three or more functional units including a first functional unit, the second input / output unit, and a plurality of functional units other than the first functional unit are included in the input unit. A second arbitration unit arranged between the output unit and the second arbitration unit, wherein the second arbitration unit receives the information transmitted from the second input / output unit according to the destination or content thereof. Of the functional units other than the functional unit, the information is transmitted to the input / output units of the functional units other than the first functional unit, and the information transmitted from the input / output units of the functional units other than the first functional unit is input to the second functional unit. The IC card according to claim 2, wherein the IC card is transmitted to an input / output unit.

According to a fourth aspect of the present invention, information input from the outside to the plurality of functional units can be processed by one of the functional units and cannot be processed by another of the functional units. If there is,
4. The arbitration unit, the first arbitration unit, or the second arbitration unit transmits the information only to the functional unit that can process the information. The IC card according to the claims.

According to a fifth aspect of the present invention, each of the functional units has a plurality of states and a state management unit for managing the states, and at least one piece of information is one of the functional units. The processing is possible in one state and not possible in the other states of the functional unit, and the arbitration unit, the first arbitration unit, or the second arbitration unit.
The arbitration unit can process the information, which is externally input and addressed to the plurality of functional units, to one of the functional units based on the state information transmitted from the state management unit of each of the functional units. And the information cannot be processed by the other functional units, the information is transmitted only to the functional unit that can process the information. The IC card according to the claims.

According to a sixth aspect of the present invention, the functional unit has a first mode in which response information is output when the information cannot be processed and a second mode in which response information is not output. The arbitration unit, the first arbitration unit, or the second arbitration unit uses different methods for different information transmitted from the outside depending on whether the functional unit is in the first mode or the second mode. The IC card according to any one of claims 1 to 5, wherein the IC card is transmitted to the functional unit by the above method.

According to a seventh aspect of the invention, when information addressed to a plurality of the functional units is input from the outside, the information is transmitted to each of the functional units, and the arbitration unit and the first arbitration unit. Alternatively, the second arbitration unit inputs the response information from each of the functional units instead of the function, and the response information in the case where the information input from the outside can be processed in the response information, The response information when the information input from the outside is unprocessable is included, and only the response information when the information input from the outside is processable is output. The IC card according to any one of claims 6.

According to an eighth aspect of the present invention, at least one line is shared with the input / output section of another functional unit to input / output information to / from the outside through the input / output section and the input / output section. An input / output unit of the second functional unit, which has a second functional unit and a third functional unit, each of which has a control unit that inputs and outputs information, and a functional operation unit that operates under the control of the control unit. (Hereinafter referred to as “third input / output section”) and the input / output section of the third functional unit (hereinafter referred to as “fourth input / output section”) are the same as the third input / output section. The information that the processable information has been input is transmitted from the third input / output unit to the fourth input / output unit, and the information that the fourth input / output unit has input the processable information is the fourth information. Is connected to the third input / output section from the input / output section of When the fourth input / output unit inputs the information that the third input / output unit has input the processable information through the line, the fourth input / output unit outputs response information to the information. If the third input / output unit receives the information that the fourth input / output unit has input the processable information through the line, the third input / output unit receives the information. The IC card is characterized by not outputting response information.

According to a ninth aspect of the present invention, at least one line is shared with the input / output section of another functional unit to input / output information from / to the outside through the input / output section and the input / output section. An input / output unit of the second functional unit, which has a second functional unit and a third functional unit, each of which has a control unit that inputs and outputs information, and a functional operation unit that operates under the control of the control unit. (Hereinafter referred to as “third input / output section”) and the input / output section of the third functional unit (hereinafter referred to as “fourth input / output section”) are the same as the third input / output section. The information that the processable information has been input is transmitted from the third input / output unit to the fourth input / output unit, and the information that the fourth input / output unit has input the processable information is the fourth information. Is connected to the third input / output section from the input / output section of Information that the third input / output unit has input information that can be processed by the line is input by the fourth input / output unit and the fourth input / output unit determines that the information cannot be processed. In this case, the fourth input / output unit does not output the response information in response to the information, and the information that the fourth input / output unit can process the information is input through the line to the third input / output unit. If the third input / output unit determines that the information cannot be processed by the third input / output unit, the third input / output unit does not output response information in response to the information. It is an IC card that does.

According to a tenth aspect of the present invention, a plurality of functional units and information transmitted from the outside are input, and the information is distributed to the input / output unit of the functional unit and transmitted according to the destination or contents thereof. And an arbitration unit that inputs information transmitted from the input / output unit of the functional unit and outputs the information to the outside, wherein the plurality of functional units include an input / output unit and information through the input / output unit. A method for controlling an IC card, comprising: a control unit for inputting and outputting the information; and a functional operation unit that is controlled and operated by the control unit, wherein the arbitration unit receives information transmitted from the outside as a destination or content thereof. According to the processing result, the arbitration unit selects the information transmitted from the functional unit according to the processing result and outputs it to the outside. A control method of an IC card and having a flop, a.

According to an eleventh aspect of the present invention, three or more functional units including the first functional unit, a second input / output unit, and input / output units of a plurality of functional units other than the first functional unit. A second arbitration unit disposed between the input / output unit and the control unit for inputting / outputting information through the input / output unit; and the control unit controlled by the control unit. And a functional operation unit that operates,
A method of controlling an IC card, wherein the input / output unit of the first functional unit receives the information transmitted from the outside in accordance with the destination or content of the information, and the control unit of the first functional unit or the second unit. First allocating step of allocating to the arbitration unit of the first functional unit, and the second arbitration unit of the first functional unit according to the destination or content of the information transmitted from the input / output unit of the first functional unit. A second distributing step of distributing to a plurality of functional units other than the above, and a method of controlling the IC card.

According to a twelfth aspect of the present invention, a plurality of functional units and information transmitted from the outside are input, the information is transmitted to the input / output unit of each functional unit, and the input / output of the functional unit is input. An arbitration unit that inputs information transmitted from the unit and outputs the information to the outside, wherein the plurality of functional units include an input / output unit and a control unit that inputs / outputs information through the input / output unit. A method of controlling an IC card, comprising: a functional operation unit that is controlled and operated by the control unit, wherein the arbitration unit externally inputs information in response information transmitted from the functional unit. If the response information when the externally input information can be processed and the response information when the externally input information cannot be processed are included, only the response information when the externally input information can be processed is selected. A control method for an IC card characterized by having a selection step of outputting.

The present invention has an effect of realizing an IC card and a control method therefor in which communication is not confused even when a command from a host is transmitted to a plurality of functional units. INDUSTRIAL APPLICABILITY The present invention has an effect of realizing an IC card and a control method thereof in which communication is not confused even when a plurality of functional units return different processing results in response to one command from the host. The present invention provides an IC card and its IC that do not disrupt communication even when a command is transmitted from a host to a plurality of functional units with almost no delay in the command or response to the functional unit that requires fast response. It has the effect of realizing the control method. INDUSTRIAL APPLICABILITY The present invention has an effect that it is possible to realize an IC card and a control method thereof for transmitting information transmitted from the outside to each functional unit by an optimum method according to a plurality of modes having different response methods.

[0022]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments specifically showing the best mode for carrying out the present invention will be described with reference to the drawings.

<< Embodiment 1 >> An IC card (an IC card having a plurality of functions) according to Embodiment 1 of the present invention will be described with reference to FIGS. First, the IC of Example 1
The structure of the card will be described. 1 is a block diagram showing the configuration of an IC card according to a first embodiment of the present invention. In FIG. 1, 101 is a host (a computer in the first embodiment), and 111 is an IC card. Host 1
01 has an input / output unit 102. In addition, IC card 11
1 has an arbitration unit 112 and functional units 113 and 114. The arbitration unit 112 has an address storage unit 131. The functional unit 113 includes an input / output unit 121, a control unit 122 that inputs and outputs information through the input / output unit 121, and a functional operation unit 123 that is controlled and operated by the control unit 122. Similarly, the functional unit 114 includes the input / output unit 124 and the control unit 12.
5. The functional operation unit 126 is included.

In the first embodiment, the functional unit 113 is Blue
The tooth (registered trademark) module (wireless communication module) and the functional unit 114 are memory modules.
Communication protocol between the arbitration unit 112 and the input / output unit 102 of the host 101, the arbitration unit 112 and each functional unit 11
The communication protocol with the input / output units 121 and 124 of the reference numerals 3 and 114 is the same (the same in both hardware and software). The manufacturer is an IC card having only the functional unit 113, the functional unit 1
To efficiently design and commercialize an IC card having only 14, an IC card having functional units 113 and 114, and an IC card in which these functional units are combined with other functional units having the same protocol. Can be done. The difference from the conventional example is that an arbitration unit 112 is added before the input / output units of a plurality of functional units.

Next, the data flow of the IC card of the first embodiment will be described. Commands from the host 101 addressed to the plurality of functional units 113 and 114 are transmitted from the input / output unit 102 of the host 101 to the IC card 111. The command input to the IC card 111 is first input to the arbitration unit 112. The arbitration unit 112 determines which functional unit the command is addressed to from the information such as the command number included in the input command, and transmits the command to the destination functional unit. If the command is for multiple functional units,
If multiple functional units can process according to the command, it can process the command if the functional units that can process and those that cannot process are mixed. Transmit only to functional units.

In the functional unit, the command is first input to the input / output units 121 and 124. The input / output unit 121,
Based on information such as a command number included in the input command, 124 determines whether or not the input command can be processed by the functional unit. When the command is, for example, a command that cannot be processed and the IC card is in the second mode, the input / output unit 1
21 and 124 immediately return a response. When the command is, for example, a command for setting the input / output unit, the input / output units 121 and 12
4 immediately returns a response. When the command is, for example, a setting command for the functional operation units 123 and 126, the input / output unit 12
1 and 124 transmit the command to the control units 122 and 125.
The control units 122 and 125 set the functional operation unit according to the command and return a response via the input / output units 121 and 124. The command is, for example, the functional operation unit 123, 126 (for example, R
AM. ) Command to read data from
The input / output units 121 and 124 issue commands to the control units 122 and 125.
And is transmitted to the functional operation units 123 and 126 via. The functional operation units 123 and 126 return responses (including data read from the RAM) via the control units 122 and 125 and the input / output units 121 and 124. Finally host 10
1 receives the response output from the IC card 111.

In the description of the specification, the meaning of "determining whether or not the input / output unit can process the command" means that the input / output unit substantially determines, and the control unit or the functional operation unit determines the command. It may be inputted to judge whether or not the command can be processed, transmit the judgment result to the input / output unit, or a combination thereof (the same applies to other embodiments). In the description of the specification, "the input / output unit transmits the processing result to the host" means that the processing result generated by the input / output unit, the processing result generated by the control unit, or the processing result generated by the functional operation unit is input. It means that the output part sends to the host.

Next, the arbitration unit 112 of the IC card of the first embodiment.
The function of will be described in detail. FIG. 2 is a flowchart of the IC card control method according to the first embodiment of the present invention. First, in step 201, the command addressed to the plurality of functional units 113 and 114 transmitted from the host is input to the arbitration unit 112. In step 202, the arbitration unit 11 determines whether the input instruction is an instruction that can be processed by the functional unit 113.
Judgment is made based on information such as a command number included in the command input by the command No. 2. If the command can be processed by the functional unit 113, the process proceeds to step 203. In step 203, it is determined whether or not the input instruction is an instruction that can be processed by the functional unit 114, based on information such as an instruction number included in the instruction input by the arbitration unit 112. If the command can be processed by the functional unit 114, the process proceeds to step 204. Step two
In 04 (when the command can be processed by both the functional units 113 and 114), the arbitration unit 112 transmits the command to both the functional units 113 and 114. Step two
In 05, each of the functional units 113 and 114 processes based on the command. In step 206, the functional unit 113
And 114 transmit the respective processing results to the arbitration unit 112. In step 207, the arbitration unit 112 transmits the processing result of the predetermined functional unit to the host 101, and this flowchart ends.

In step 203, if the input command is a command that cannot be processed by the functional unit 114, the process proceeds to step 208. In step 208 (when the command can be processed only by the functional unit 113), the arbitration unit 11
2 sends a command only to the functional unit 113. In step 209, the functional unit 113 processes according to the command. In step 210, the functional unit 113 sends the processing result to the arbitration unit 112. In step 211, the arbitration unit 1
12 transmits the processing result to the host 101, and this flowchart ends. In step 202, if the input command is a command that cannot be processed by the functional unit 113, the process proceeds to step 212. In step 212, as in step 203, the input command is the functional unit 1
Whether or not the command can be processed by 14 is determined based on information such as a command number included in the command input by the arbitration unit 112.
If the command can be processed by the functional unit 114, the process proceeds to step 213. In step 213 (when the command can be processed only by the functional unit 114), the arbitration unit 1
12 sends a command only to the functional unit 114. In step 214, the functional unit 114 processes according to the command. In step 215, the functional unit 114 transmits the processing result to the arbitration unit 112. In step 211, the arbitration unit 1
12 transmits the processing result to the host 101, and this flowchart ends.

In step 212, if the input command is a command that cannot be processed by the functional unit 114, the process proceeds to step 216. In step 216 (when the command cannot be processed by both the functional units 113 and 114),
Whether or not the mode is currently the first mode (in the embodiments, the second mode when not the first mode. In all the embodiments, the modes of all the functional units (the first mode or the second mode). ) Is always the same.)
2 judges. If it is not the first mode (if it is the second mode), the process proceeds to step 217, and the arbitration unit 112 transmits a command to a predetermined functional unit. In step 218, the functional unit processes according to the command.
In step 219, the functional unit arbitrates the processing result by the arbitration unit 11.
Send to 2. The processing result includes information (error information) that the input command cannot be processed by the functional unit. In step 211, the arbitration unit 112 transmits the processing result to the host 101, and this flowchart ends.

If the mode is the first mode in step 216, the process proceeds to step 220, in which the arbitration unit 112 stores the information that the unprocessable command is received (does not send the command to the functional units 113 and 114). This flowchart ends. The first mode is a mode in which error information is not returned even when a command that cannot be processed is received, and information that the command that cannot be processed is received is stored. Also,
The second mode is a mode in which an error is returned as soon as a command that cannot be processed is received.

In the present embodiment, in step 207 (when the commands can be processed by both the functional units 113 and 114), the arbitration unit 112 transmits the processing result of the functional unit determined in advance to the host 101. Instead, the arbitration unit 112 determines whether or not the processing results of the functional units 113 and 114 are the same, and if they are the same, sends the processing result to the host 101, and if they are different, sends error information to the host 101. It may be done. Further, in the present embodiment, in steps 204 to 206 (when the commands can be processed by both the functional units 113 and 114), the arbitration unit 112 causes the functional units 113 and 114 to operate.
To the functional unit 11 based on the command.
Both 3 and 114 process, and the functional units 113 and 114 transmit the respective processing results to the arbitration unit 112. Instead, the arbitration unit 112 transmits a command only to a predetermined functional unit, only the functional unit to which the command is transmitted processes, and only the functional unit transmits the processing result to the arbitration unit 112. Also good.

Further, in this embodiment, in steps 217 and 219 (when both the functional units 113 and 114 are unprocessable commands and the second mode is selected), the arbitration unit 112 uses the predetermined functional units. To the arbitration unit 112, only the functional unit to which the command is transmitted processes, and only the functional unit transmits the processing result to the arbitration unit 112. Instead of this, the arbitration unit 112 does not send an instruction to the functional units 113 and 114, and sends error information indicating that the processing is impossible to the host 10.
1 may be transmitted.

According to the present invention, by adding the arbitration unit corresponding to the same protocol before the input / output unit of the functional unit corresponding to the standardized protocol, the response signal to the host does not collide with a simple structure. Realized an IC card.
The present invention has realized an IC card compatible with a plurality of modes of protocols.

<Embodiment 2> An IC card of Embodiment 2 of the present invention (an IC card having a plurality of functions) will be described with reference to FIGS. First, the IC of Example 2
The structure of the card will be described. FIG. 3 is a block diagram showing the configuration of the IC card according to the second embodiment of the present invention. In FIG. 3, 101 is a host (a digital camera in the second embodiment), and 311 is an IC card. The host 101 has an input / output unit 102. In addition, IC card 3
11 is a first functional unit 313, a functional unit 314
Have. The first functional unit 313 is the input / output unit 32.
1. Control unit 3 for inputting / outputting information through the input / output unit 321
22 and a functional operation unit 323 controlled and operated by the control unit 322. The functional unit 314 is the input / output unit 32.
4, a control unit 325, and a functional operation unit 326. The input / output unit 321 includes a first input / output unit 331 and a first arbitration unit 33.
2, having a second input / output unit 333.

In the second embodiment, the first functional unit 313
Is a Bluetooth (registered trademark) module (wireless communication module), and the functional unit 314 is a memory module. The communication protocol between the input / output unit 321 and the input / output unit 102 of the host 101 and the communication protocol between the input / output unit 321 and the input / output unit 324 of the other functional unit 314 are the same. The same components as those in the first embodiment (FIG. 1) are designated by the same reference numerals. The difference from the first embodiment is that in the first embodiment, the arbitration unit is independent of the functional unit.
The arbitration unit is included in the input / output unit of one functional unit.

Next, the data flow of the IC card of the second embodiment will be described. Commands from the host 101 to the plurality of functional units 313 and 314 are transmitted from the input / output unit 102 of the host 101 to the IC card 311. The command input to the IC card 311 is first input to the first input / output unit 331 and the first arbitration unit 332 of the input / output unit 321 of the first functional unit 313. First arbitration unit 332
Determines which functional unit the command is addressed to, based on information such as the command number included in the input command, and when the command is addressed to the functional unit 314, the command is executed via the second input / output unit 333. Input / output unit 324 of unit 314
To transmit.

First input / output unit 331 and input / output unit 324
Determines whether or not the input command can be processed by the functional unit based on information such as the command number included in the input command. The command is, for example, a command that cannot be processed, and I
If the C card is in the second mode, the input / output unit 33
1, 324 immediately return a response. If the command is, for example, a command for setting the input / output unit, the input / output units 331, 324
Returns a response immediately. The command is, for example, the functional operation unit 3
23, 326 setting command, etc., the input / output unit 331,
324 transmits the command to the control units 322 and 325. The control units 322 and 325 set the functional operation unit according to the command,
A response (for example, ACK) is returned via the input / output units 331 and 324. The command is, for example, the functional operation units 323, 32.
In the case of a command (including write data) for writing data to 6 (for example, a wireless communication output buffer),
The input / output units 331 and 324 send commands to the control units 322 and 325.
To the functional operation units 323 and 326 via the. The function operation units 323 and 326 write data in the wireless communication output buffer, and the control units 322 and 325 and the input / output unit 33.
A response (eg, ACK) is returned via 1, 324. The response from the functional unit 314 is the second
Of the IC via the input / output unit 333 and the first arbitration unit 332.
Output from the card. The first arbitration unit 332 outputs the response received from the second input / output unit 333, or the first input / output unit 331 outputs the response of the functional unit 313. The host 101 receives the response output from the IC card 311.

Next, the function of the first arbitration unit 332 of the IC card of the second embodiment will be described in detail. FIG. 4 is a flow chart of an IC card control method according to the second embodiment of the present invention. First, in step 401, the command addressed to the plurality of functional units 313 and 314 transmitted from the host is input to the first input / output unit 331 and the first arbitration unit 332. In step 402, the input command is the first functional unit 31
It is determined whether or not the command can be processed by No. 3 based on information such as a command number included in the command input by the first arbitration unit 332. If the command can be processed by the first functional unit 313, the process proceeds to step 403. In step 403, it is determined whether or not the input instruction is an instruction that can be processed by the functional unit 314, based on information such as an instruction number included in the instruction input by the first arbitration unit 332. If the command can be processed by the functional unit 314, the process proceeds to step 404. In step 404 (when the command can be processed by both the first functional unit 313 and the functional unit 314), the first arbitration unit 312 transmits the command to the functional unit 314 via the second input / output unit 333. To do. In step 405, each of the first functional unit 313 and the functional unit 314 processes according to the command. In step 406, the functional unit 314 transmits the processing result to the first arbitration unit 332 via the second input / output unit 333. Step 407
Then, the first input / output unit 331 is connected to the first functional unit 313.
Of the processing result of the first arbitration unit 33
2 does not transmit the processing result. ), The flowchart ends.

In step 403, if the input command is a command that cannot be processed by the functional unit 314, the process proceeds to step 408. In step 408 (if the command can be processed only by the functional unit 313), the first functional unit 313 processes based on the command. Step 40
7, the first input / output unit 331 is connected to the first functional unit 31.
3 is sent to the host 101 (the first arbitration unit 3
32 does not transmit the processing result. ), The flowchart ends.

In step 402, the input command is the first command.
If the command cannot be processed by the functional unit 313, the process proceeds to step 409. Step 409 is processing in the case where the command cannot be processed by the first functional unit 313, and will be described in detail with reference to FIG. FIG. 5 is a flow chart of a method of controlling an IC card according to the second embodiment of the present invention (processing when the command cannot be processed by the first functional unit 313). In step 501, similarly to step 403, it is determined whether or not the input instruction is an instruction that can be processed by the functional unit 314, based on information such as an instruction number included in the instruction input by the first arbitration unit 332. If the command can be processed by the functional unit 314, the process proceeds to step 502. In step 502 (when the command can be processed only by the functional unit 314), the first arbitration unit 332 determines whether the current mode is the first mode. If it is the first mode, the process proceeds to step 503. In step 503, the first arbitration unit 332 causes the first input / output unit 331 to reset the information that the unprocessable instruction is received. If it is not the first mode (if it is the second mode), step 5
08, the first arbitration unit 332 determines that the first input / output unit 33
Causes 1 to stop sending error information.

In step 504, the first arbitration unit 332 sends a command to the functional unit 314 via the second input / output unit 333. In step 505, the functional unit 314 processes according to the command. In step 506, the functional unit 314 transmits the processing result to the first arbitration unit 332 via the second input / output unit 333. In step 507, the first
The arbitration unit 332 transmits the processing result of the functional unit 314 to the host 101, and this flowchart ends.

If the input instruction is an instruction that cannot be processed by the functional unit 314 in step 501, the process proceeds to step 509. In step 509 (when the command cannot be processed by both the first functional unit 313 and the functional unit 314), the first arbitration unit 332 determines whether the current mode is the first mode. If it is the first mode, the process proceeds to step 510. In step 510, the first arbitration unit 33.
No. 2 stores the information that it has received an unprocessable command (does not send the command to the functional unit 314), and this flowchart ends. In step 509, if it is not the first mode (if it is the second mode), step 5
11, the first arbitration unit 332 does nothing (does not send a command to the functional unit 314). Step 51
At 2, the first input / output unit 331 transmits error information to the host 101, and this flowchart ends.

In the present embodiment, in step 407 (when the command can be processed by both the first functional unit 313 and the functional unit 314), the first input / output unit 331 outputs the processing result of the first functional unit 313. Send to host 101. Instead, the first arbitration unit 332 determines whether the processing results of the first functional unit 313 and the functional unit 314 are the same, and if they are the same, sends the processing results to the host 101, and if they are different. Error information host 1
01 (the first input / output unit 331 does not send the processing result). Further, in the present embodiment, in steps 404 to 406 (when the commands can be processed by the first functional units 313 and 314 together), the first arbitration unit 332 transmits a command to the functional unit 314, and based on the command. Both the first functional units 313 and 314 process, and the functional unit 314 sends the processing result to the first arbitration unit 332. Instead of this, the first
The arbitration unit 332 transmits the command only to a predetermined functional unit (for example, does not transmit the command to the functional unit 314. Or, for example, transmits the command to the functional unit 314 and inputs it to the first input / output unit 331. The command may be abandoned), and only the functional unit to which the command is transmitted may process, and only that functional unit may transmit the processing result to the host 101 directly or via the first arbitration unit 332.

In step 511 and step 512 of the present embodiment (when both the first functional unit 313 and the functional unit 314 cannot process the command and the second mode is selected), the first arbitration unit 332 is used. Does nothing (does not send a command to functional unit 314), and
The input / output unit 331 of sends the error information to the host 101. Instead, the first arbitration unit 332 sends the command only to the predetermined functional unit (for example, does not send the command to the functional unit 314. Or, for example, sends the command to the functional unit 314 and the first functional unit 314). Input / output section 3
Causes the command entered in 31 to be abandoned. ), Only the functional unit to which the command is transmitted may be processed, and only the functional unit may transmit the processing result to the host 101 directly or via the first arbitration unit 332.

The IC card of the first embodiment has no arbitration unit.
Compared to the C card, the response speed is slower by the processing time of the arbitration unit. In the second embodiment, the host and the functional unit 3
Since communication with the host 14 goes through the first arbitration unit 332, transmission time may be longer than that in the conventional example, but communication between the host and the first functional unit 313 is performed by the first arbitration unit 3.
Since it is performed without passing through 32, it has a response speed equivalent to that of the conventional IC card. In the IC card of the second embodiment, the first functional unit that requires the fastest response speed is
It is preferable to use the functional unit 313 of FIG. Alternatively, it is preferable that the first functional unit 313 is the functional unit that is requested to respond most frequently. In this embodiment, by adding the first arbitration unit and the second input / output unit to one input / output unit of the IC card, one of the plurality of functional units (first functional unit) is the host. We have realized an IC card with a simple structure that maintains high responsiveness to.

<< Third Embodiment >> An IC card according to a third embodiment of the present invention (an IC card having a plurality of functions) will be described with reference to FIG. First, the configuration of the IC card of the third embodiment will be described. FIG. 6 is a block diagram showing the configuration of an IC card according to the third embodiment of the present invention. In FIG. 6, 101 is a host (a mobile phone in the third embodiment), and 611 is an IC card. The host 101 has an input / output unit 102. The IC card 611 is the first
Functional unit 313, functional units 314 and 61
5, and has a second arbitration unit 634. The first functional unit 313 has an input / output unit 321, a control unit 322 for inputting / outputting information via the input / output unit 321, and a functional operation unit 323 controlled and operated by the control unit 322. The functional unit 314 includes an input / output unit 324, a control unit 325, a functional operation unit 3
Has 26. Similarly, the functional unit 615 is the input / output unit 6
27, a control unit 628, and a functional operation unit 629. The input / output unit 321 includes a first input / output unit 331 and a first arbitration unit 33.
2, having a second input / output unit 333.

In the third embodiment, the first functional unit 313
Is a Bluetooth (registered trademark) module (wireless communication module), and the functional units 314 and 615 are memory modules. The same components as those in the second embodiment (FIG. 4) are designated by the same reference numerals. In the third embodiment, another functional unit is added to the IC card of the second embodiment. First
Since there are a plurality of functional units other than the functional unit 313 of No. 2, the second arbitration unit 634 is provided before the input / output units of these functional units. Second arbitration unit 634
Has the same function as the arbitration unit 112 of the first embodiment. As a result, the IC card of the third embodiment can obtain the same effects as the IC cards of the first and second embodiments.

<Embodiment 4> An IC card (an IC card having a plurality of functions) according to Embodiment 4 of the present invention will be described with reference to FIGS. Introduction IC of Example 4
The structure of the card will be described. FIG. 7 is a block diagram showing the configuration of an IC card according to the fourth embodiment of the present invention. In FIG. 7, 101 is a host (a set top box in the fourth embodiment), and 711 is an IC card.
The host 101 has an input / output unit 102. Further, the IC card 711 has a second functional unit 713 and a third functional unit 714. The second functional unit 713 has a third input / output unit 721, a control unit 722 for inputting / outputting information through the input / output unit 721, and a functional operation unit 723 controlled and operated by the control unit 722. The third functional unit 714 has a fourth input / output unit 724, a control unit 725, and a functional operation unit 726.

In the fourth embodiment, the second functional unit 713
Is a Bluetooth (registered trademark) module (wireless communication module), and the third functional unit 714 is a memory module. The same components as those in the first embodiment (FIG. 1) are designated by the same reference numerals. The difference from the first embodiment is that the selection of commands and the like performed in the arbitration unit in the first embodiment is realized by exchanging information between the input / output units of the respective functional units.

Next, the data flow of the IC card of the fourth embodiment will be described. Commands from the host 101 addressed to the plurality of functional units 713 and 714 are transmitted from the input / output unit 102 of the host 101 to the IC card 711. The command input to the IC card 711 is first input to the third input / output unit 721 of the second functional unit 713 and the fourth input / output unit 724 of the third functional unit 714. The third input / output unit 721 and the fourth input / output unit 724 use two lines (information indicating whether or not the second functional unit 713 can process the command is output from the third input / output unit 721 to the third input / output unit 721). No. 4 input / output unit 724 and information about whether the third functional unit 714 can process the command, the fourth input / output unit 72.
4 to the third input / output unit 721).

The command uses the information transmitted through the above two lines to use the third input / output unit 721 and the fourth input / output unit 7
They are mutually adjusted at 24 (the adjusting method will be described later (FIG. 8)).
The input / output units 721 and 724 determine whether or not the input instruction can be processed by the functional unit based on the information such as the instruction number included in the input instruction. When the command is, for example, a command that cannot be processed and the IC card is in the second mode, the input / output units 721 and 724 immediately return a response. When the command is, for example, a command for setting the input / output unit, the input / output units 721 and 724 immediately return a response. When the instruction is, for example, an information request instruction of the setting state of the functional operation units 723 and 726, the input / output units 721 and 724 transmit the instruction to the control units 722 and 725. The control units 722 and 725 return responses (including information on the setting state of the functional operation unit) via the input / output units 721 and 724. In the case where the command is, for example, a command for reading data from the functional operation units 723 and 726 (for example, an input buffer for wireless communication),
The input / output units 721 and 724 issue commands to the control units 722 and 725.
To the functional operation units 723 and 726 via the. The functional operation units 723 and 726 return a response (including data read from the input buffer of wireless communication) via the control units 722 and 725 and the input / output units 721 and 724.
The above responses are mutually adjusted by the third input / output unit 721 and the fourth input / output unit 724 (the adjusting method will be described later).
Output. Finally, the host 101 receives the response output from the IC card 711.

When there are three or more functional units,
For example, two adjacent functional units are connected by two lines each to connect all functional units (Excluding the functional units at both ends, one functional unit is connected to the left and right functional units by two lines each. ). When the IC card inputs a command, the input / output unit of one functional unit outputs the left and right lines if it judges that the input command can be processed by the information such as the command number included in the input command. Information (for example, low level) indicating that processing is possible is output from the circuit. If the input / output unit determines that the input command cannot be processed and inputs the information (for example, high level) that cannot be processed from the left (or right) line, the right (or left) line is input. Outputs information (for example, high level) that processing is impossible. If the input / output unit determines that the input command cannot be processed and inputs information (for example, low level) that it can process from the left (or right) line, it processes from the right (or left) line. It outputs information that it is possible (for example, low level). With the above method, if any functional unit can be processed, the information can be transmitted to all functional units. Even when the number of functional units is three or more, the same functions and effects as in the fourth embodiment can be obtained.

Next, the adjusting function of the input / output unit of the IC card of the fourth embodiment will be described in detail. FIG. 8 is a flowchart of the IC card control method according to the fourth embodiment of the present invention. First, in step 801, the command addressed to the plurality of functional units 713 and 714 transmitted from the host is input to the third input / output unit 721 and the fourth input / output unit 724. In step 802, the input command is the second functional unit 71.
It is determined whether or not the command can be processed by No. 3, based on information such as a command number included in the command input by the third input / output unit 721. If the command can be processed by the functional unit 713,
Proceed to step 803. In step 803, the third input / output unit 721 determines that the input command is the second functional unit 71.
The information that the command can be processed in 3 is transmitted to the fourth input / output unit 724 (a low level signal is transmitted through the transmission line). The fourth input / output unit 7 that has received this information
24 does not respond to this command. In step 804, the second functional unit 713 processes according to the command. In step 805, the third input / output unit 721 of the second functional unit 713 transmits the processing result of the second functional unit 713 to the host 101, and this flowchart ends.

In step 802, the input command is the second command.
If the command cannot be processed by the functional unit 713, the processing proceeds to step 806. In step 806, the fourth input / output unit 724 determines that the input command is the second functional unit 713.
The information that the command cannot be processed is received from the third input / output unit 721 (a high level signal is received through the transmission line). In step 807, it is determined whether or not the input instruction is an instruction that can be processed by the third functional unit 714, based on information such as an instruction number included in the instruction input by the fourth input / output unit 724. If the command can be processed by the third functional unit 714, the process proceeds to step 808. In step 808 (the third functional unit 71
4), the fourth input / output unit 724 determines that the input instruction is the third functional unit 714.
The information indicating that the command can be processed in (3) is transmitted to the third input / output unit 721 (a low level signal is transmitted through the transmission line). Third input / output unit 72 that received this information
1 (the second functional unit 713 cannot process the command) does not respond to this command. Step 809
Then, the third functional unit 714 processes according to the command.
In step 810, the fourth input / output unit 724 of the third functional unit 714 transmits the processing result of the third functional unit 714 to the host 101, and this flowchart ends.

In step 807, the input command is the third command.
In the case of an instruction that cannot be processed by the functional unit 714, the processing proceeds to step 811. In step 811, (when both the second functional unit 713 and the third functional unit 714 cannot process the instruction), the third input / output unit 721
The fourth input / output unit 72 based on the information that the input command is a command that cannot be processed by the third functional unit 714.
4 (the high level signal is received through the transmission line). Therefore, the third input / output unit 721 can know that both the functional units 713 and 714 cannot process the command. In step 812, the third input / output unit 721 determines whether the current mode is the first mode. If it is the first mode, the process proceeds to step 813. In step 813, the third input / output unit 721 stores the information that the unprocessable instruction is received (the third input / output unit 72).
Both the first and fourth input / output units 724 are the host 101.
Do not send a reply to. ), The flowchart ends. In step 812, if it is not the first mode (second
If the mode is set to (NO), the process proceeds to step 814, where the third input / output unit 721 notifies the host 101 of error information (for example, NA
K) (the fourth input / output unit 724 does not send a response to the host 101), and this flowchart ends.

In the present embodiment, in steps 804 and 805, even if the command can be processed by the third functional unit 714, only the second functional unit 713 processes it and sends the processing result to the host 101. To do. Instead of this, whether or not the command can be processed by the third functional unit 714 is determined by information such as a command number included in the command input by the fourth input / output unit. If it is a command that can be processed, processing is performed by both the second functional unit 713 and the third functional unit 714, and it is determined whether the respective processing results are the same. If they are the same, the processing result is sent to the host 101, and if they are different, the error information is sent to the host 1.
01 may be transmitted. Further, in the present embodiment, in step 814 (the second functional unit 713,
If the third functional unit 714 cannot process both commands and is in the second mode), the third input / output unit 72
1 transmits error information to the host 101 (the fourth input / output unit 724 does not transmit a response to the host 101). Alternatively, both the second functional unit 713 and the third functional unit 714 may send the error information to the host 101. When the third input / output unit 721 and the fourth input / output unit 724 transmit the same signal (for example, NAK) by the synchronous method, the host can read the signals output by the two functional units at the same time. In this embodiment, the input / output units of the IC card are connected to each other, and the input / output circuits are controlled to each other, so that all functional units maintain a responsiveness to the host. Realized the IC card of.

In another embodiment, the third input / output unit 7
21 and the fourth input / output unit 724 are connected by a single line connected to a power supply by a resistor, and the third input / output unit 721 and the fourth input / output unit 724 are an input circuit and an open collector type. It has an output circuit (a so-called wired OR configuration). Third input / output unit 721 and fourth input / output unit 72
When each of the Nos. 4 and 4 judges that the input command can be processed, the open collector type output circuit is turned on (if any one of the open collector type output circuits is turned on, the potential of the line becomes low level), and the input is made. If it judges that the command cannot be processed, the open collector type output circuit is turned off.
Set to F (if both are OFF, the potential of the line becomes high level).

Thus, if the third input / output unit 721 and the fourth input / output unit 724 can be processed by the functional unit, the functional operation units 723 and 726 process the result and output the processing result, and the function thereof is output. If it cannot be processed by the unit and can be processed by other functional units (it can be judged from the relevant line being low level), the response result is not output and it cannot be processed by any of the functional units. If (the line can be judged from the high level)
The response result (eg NAK) is output. When the two functional units can both process the command, interference can be prevented by determining the priority order of returning a response to the host. If there are more than three functional units,
If any of the functional units can be processed, the information can be transmitted to all the functional units by the same method as the embodiment.

<Embodiment 5> An IC card of Embodiment 5 of the present invention (an IC card having a plurality of functions) will be described with reference to FIGS. First, I of Example 5
The configuration of the C card will be described. FIG. 9 is a block diagram showing the configuration of an IC card according to the fifth embodiment of the present invention. Figure 9
In the figure, 101 is a host (a voice recorder in the fifth embodiment), and 911 is an IC card. The host 101 has an input / output unit 102. Also, IC card 9
Reference numeral 11 has an arbitration unit 912, a functional unit 913, and a functional unit 914. The functional unit 913 is an input / output unit 92.
1. Control unit 9 for inputting / outputting information through the input / output unit 921
22, a functional operation unit 923 controlled and operated by the control unit 922, and a state management unit 931. Functional unit 9
14 is an input / output unit 924, a control unit 925, and a functional operation unit 92.
6. It has a state management unit 932.

In the fifth embodiment, the functional unit 913 is Blue
The tooth (registered trademark) module (wireless communication module) and the functional unit 914 are memory modules.
The communication protocol between the arbitration unit 912 and the input / output unit 102 of the host 101, the arbitration unit 912, and each functional unit 91.
The communication protocol between the I / O units 921 and 924 of the Nos. 3 and 914 is the same. The same components as those in the first embodiment (FIG. 1) are designated by the same reference numerals. The difference from the first embodiment is that state management units 931 and 932 are added.
In the fifth embodiment, each functional unit has a plurality of states, and each functional unit can process one command (for example, a selection command for selecting the functional unit) in a certain condition (for example, a non-selected condition). Yes, it cannot be processed in another state (for example, a state already selected).

Next, the data flow of the IC card of the fifth embodiment will be described. Commands from the host 101 addressed to the plurality of functional units 913 and 914 are transmitted from the input / output unit 102 of the host 101 to the IC card 911. The command input to the IC card 911 is first input to the arbitration unit 912. The arbitration unit 912 includes state management units 931 and 93.
On the basis of the state of each functional unit transmitted from 2, the information such as the command number included in the input command determines which functional unit can process the command, and the command is transmitted to the processable functional unit.

In the functional unit, the command is first input to the input / output units 921 and 924. Input / output unit 921,
Based on information such as a command number included in the input command, 924 determines whether the input command can be processed by the functional unit. If the command is, for example, a command that cannot be processed, and the IC card is in the second mode, the input / output unit 9
21, 924 immediately returns a response. When the command is, for example, a command for setting the input / output unit, the input / output units 921 and 92
4 immediately returns a response. If the command is, for example, a setting command for the functional operation units 923 and 926, the input / output unit 92
1, 924 transmits the command to the control units 922 and 925.
The control units 922 and 925 set the functional operation unit and return a response via the input / output units 921 and 924. When the command is, for example, a command for reading data from the functional operation units 923 and 926 (for example, RAM), the input / output units 921 and 924 send the commands to the functional operation units 923 and 926 via the control units 922 and 925. To transmit. Functional operation unit 9
23 and 926 are control units 922 and 925 and an input / output unit 92.
A response (including data read from the RAM) is returned via 1, 924. The arbitration unit 912 arbitrates and outputs the received response. Finally host 101
Receives the response output from the IC card 911.

Next, the state transition of the functional units of the IC card of the fifth embodiment will be described. FIG. 10 is a flow chart of the states of the functional units of the IC card according to the fifth embodiment of the present invention. First, in step 1001, when the power is turned on, the initial state is set. In step 1002, an initialization command is input. In step 1003, the second state is set.
In step 1004, an initial setting command is input. In step 1005, the third state is set. In step 1006, the functional operation is executed. Normally, the user uses the IC card in this state. When the reset command is input in step 1007, the process returns to step 1001.

For example, in the initial state (the functional unit is not initialized), the functional unit cannot process the actual operation (read / write) command.
Further, for example, in the second state (initialization of the functional unit is not completed), the functional unit cannot process the actual operation (read / write) command. In the present invention, a state management unit is added, and the arbitration unit performs the distribution process in consideration of the states of the functional units. For example, the state management unit receives one command addressed to a plurality of (for example, two) functional units, and one functional unit can process the command, while the other one functional unit can process the command. If the instruction cannot be processed in the current state, the arbitration unit transmits the instruction only to the functional unit capable of processing, and transmits the processing result sent back from the functional unit to the host. The present embodiment is an IC card with a simple configuration in which commands are correctly distributed according to the states of functional units.

<Embodiment 6> An IC card (an IC card having a plurality of functions) according to a sixth embodiment of the present invention will be described with reference to FIGS. First, I of Example 6
The configuration of the C card will be described. First Embodiment FIG. 1 is a block diagram showing the configuration of an IC card according to a sixth embodiment of the present invention. The description is omitted because it is the same as the first embodiment (FIG. 1).

Next, the arbitration unit 112 of the IC card of the sixth embodiment.
The function of will be described in detail. FIG. 11 is a flowchart of the IC card control method according to the sixth embodiment of the present invention.
First, in step 1101, the commands sent to the plurality of functional units 113 and 114 from the host are sent to the arbitration unit 112.
Entered in. In step 1102, the arbitration unit 112 sends a command to both the functional units 113 and 114. In step 1103, each of the functional units 113 and 114 processes according to the command. In step 1104, the functional units 113 and 114 transmit their processing results to the arbitration unit 112. In step 1105, the arbitration unit 1 determines whether the processing results of the functional units 113 and 114 are the same.
12 judges. If they are the same, the process proceeds to step 1106, the arbitration unit 112 transmits the processing result to the host 101, and this flowchart ends.

If the processing result is different in step 1105, the process proceeds to step 1107. In step 1107, the response information from the functional unit 113 includes the information (ACK) that the command can be processed by the functional unit 113, and the command in the response information from the functional unit 114 is the function. The arbitration unit 11 determines whether or not information (NAK) that the unit 114 cannot process is included.
2 judges. If both are included, the process proceeds to step 1108, the arbitration unit 112 transmits the processing result of the functional unit 113 to the host 101, and this flowchart ends. In step 1107, otherwise,
Proceed to step 1109. In step 1109, the response information from the functional unit 113 includes information (NAK) that the command cannot be processed by the functional unit 113, and the command is included in the response information from the functional unit 114. The arbitration unit 112 determines whether or not the information (ACK) that can be processed by the functional unit 114 is included. If both are included, step 11
In step 10, the arbitration unit 112 transmits the processing result of the functional unit 114 to the host 101, and this flowchart ends. If it is determined in step 1109 that both are not included, the process proceeds to step 1111 and the arbitration unit 112 determines whether or not the current mode is the first mode. If it is the first mode, the process proceeds to step 1112. Step 111
In 2, the arbitration unit 112 stores the information that the unprocessable command is received (does not send the command to the functional units 113 and 114), and this flowchart ends. In step 1111, if it is not the first mode (if it is the second mode), the process proceeds to step 1113, and the arbitration unit 112.
Sends error information (information indicating that processing is impossible (NAK)) to the host 101, and this flowchart ends.

In this embodiment, an arbitration unit is added before the input / output unit of the functional unit, the arbitration unit transmits the input command to each functional unit, and the processing result (response) sent back from each functional unit. Is arbitrated and output. This allows
We have realized an IC card with a simple structure that does not cause signal collision to the host. In the sixth embodiment, the arbitration unit sends a command to all the functional units when a command is input from the host, selects an appropriate response from the responses from each functional unit to the command, and returns it to the host. . Example 2,
Regarding 3 and 5, the arbitration unit of each embodiment sends a command to all functional units when a command from the host is input, and selects an appropriate response from the responses from each functional unit to the command. Then you can send it back to the host. As a result, an IC card with a simple structure that does not cause a signal collision to the host has been realized.

[0070]

According to the present invention, it is possible to realize an IC card and its control method capable of preventing a signal (response) from colliding with a host. According to the present invention, there is an advantageous effect that an IC card for transmitting information transmitted from the outside to each functional unit by an optimal method and a control method thereof can be realized according to a plurality of modes having different response methods. . According to the present invention, it is possible to realize an IC card in which all functional units or a specific functional unit (first functional unit) can maintain high responsiveness to a host, and an effect of controlling the IC card. According to the present invention, it is possible to obtain an effect that an IC card having a simple configuration and a control method thereof can be realized in which commands are correctly distributed according to the states of functional units.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of an IC card according to first and sixth embodiments of the present invention.

FIG. 2 is a flowchart of an IC card control method according to the first embodiment of the present invention.

FIG. 3 is a block diagram showing a configuration of an IC card according to a second embodiment of the present invention.

FIG. 4 is a flowchart of an IC card control method according to a second embodiment of the present invention.

FIG. 5 is a flowchart of an IC card control method according to a second embodiment of the present invention (processing when a command cannot be processed by the first functional unit).

FIG. 6 is a block diagram showing a configuration of an IC card according to a third embodiment of the present invention.

FIG. 7 is a block diagram showing a configuration of an IC card according to a fourth embodiment of the present invention.

FIG. 8 is a flowchart of an IC card control method according to a fourth embodiment of the present invention.

FIG. 9 is a block diagram showing a configuration of an IC card according to a fifth embodiment of the present invention.

FIG. 10 is a flowchart of an IC card control method according to a fifth embodiment of the present invention.

FIG. 11 is a flowchart of an IC card control method according to a sixth embodiment of the present invention.

FIG. 12 is a block diagram showing a configuration of a conventional IC card.

[Explanation of symbols]

101 host 102 input / output unit 111, 311, 611, 811, 911, 1311
IC cards 112, 912 Arbitration units 113, 114, 314, 615, 913, 914
Functional units 121, 124, 321, 324, 627, 921, 9
24 Input / output units 122, 125, 322, 325, 628, 722, 7
25, 922, 925 Control unit 123, 126 323, 326, 629, 723, 7
26, 923, 926 Functional operation unit 131 Address storage unit 313 First functional unit 331 First input / output unit 332 First arbitration unit 333 Second input / output unit 634 Second arbitration unit 713 Second functional unit 714 Third functional unit 721 Third input / output unit 724 Fourth input / output unit 931 and 932 State management unit

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Kazuya Iwata             1006 Kadoma, Kadoma-shi, Osaka Matsushita Electric             Sangyo Co., Ltd. (72) Inventor Satoshi Kasahara             1006 Kadoma, Kadoma-shi, Osaka Matsushita Electric             Sangyo Co., Ltd. (72) Inventor Yuuo Kato             1006 Kadoma, Kadoma-shi, Osaka Matsushita Electric             Sangyo Co., Ltd. F-term (reference) 2C005 MA27 SA05 SA06                 5B035 AA00 BB09 BB11 CA11 CA22

Claims (12)

[Claims] 1. A plurality of functional units each having an input / output unit, a control unit that inputs and outputs information through the input / output unit, and a functional operation unit that operates under the control of the control unit, and information transmitted from the outside. Input, the information is distributed to the input / output unit of the functional unit and transmitted according to the destination or content, the information transmitted from the input / output unit of the functional unit is input, and the information is output to the outside. An IC card comprising: 2. A plurality of functional units including a first functional unit, each having an input / output unit, a control unit that inputs and outputs information through the input / output unit, and a functional operation unit that operates under the control of the control unit. The input / output unit of the first functional unit, the information transmitted from the outside is the information addressed to the first functional unit, if the information is the control unit of the first functional unit. A first input / output unit for transmitting information to the outside and transmitting information to the outside; and if the information transmitted from the outside is information addressed to a functional unit other than the first functional unit, the information is transmitted to the second input / output. A first arbitration unit that transmits the information input to the second input / output unit to the outside and the information transmitted from the first arbitration unit to a functional unit other than the first functional unit. Transmission to the input / output unit of ,
An IC card, comprising: the second input / output unit for inputting information transmitted from the input / output unit of a functional unit other than the first functional unit. 3. Arranged between three or more functional units including a first functional unit, and the second input / output unit and the input / output units of a plurality of functional units other than the first functional unit. And a second arbitration unit, wherein the second arbitration unit receives the information transmitted from the second input / output unit in accordance with the destination or the contents of the plurality of units other than the first functional unit. The information is distributed to the input / output unit of the functional unit and transmitted, and the information transmitted from the input / output units of a plurality of functional units other than the first functional unit is input and transmitted to the second input / output unit. The IC card according to claim 2, wherein: 4. The arbitration unit when the information, which is input from the outside and is addressed to the plurality of functional units, can be processed by one of the functional units and cannot be processed by another of the functional units. The first arbitration unit or the second arbitration unit transmits the information only to the functional unit that can process the information. The IC card described in the item. 5. Each of the functional units has a plurality of states and a state management unit for managing the states, and at least one piece of information is one of the one of the functional units.
Processing is possible in one state and processing is not possible in another state of the functional unit, and the arbitration unit, the first arbitration unit, or the second arbitration unit is the state of each of the functional units. Based on the status information transmitted from the management unit, the information input from the outside to the plurality of functional units can be processed by one of the functional units and cannot be processed by the other functional unit. In some cases, the information is transmitted only to the functional unit that can process the information, and the IC card according to any one of claims 1 to 4. 6. The functional unit has a first mode that outputs response information and a second mode that does not output response information when information cannot be processed, and the arbitration unit and the first mode. The arbitration unit or the second arbitration unit transmits the information transmitted from the outside to the functional unit in different ways depending on whether the functional unit is in the first mode or the second mode. The IC card according to any one of claims 1 to 5, wherein: 7. When the information addressed to a plurality of the functional units is input from the outside, the information is transmitted to each of the functional units, and the arbitration unit, the first arbitration unit or the second arbitration unit Instead of the above functions, input the response information from each of the functional units, and the response information when the information input from the outside can be processed and the information input from the outside is processed in the response information. 7. If the response information in the case of being impossible is included, only the response information in the case of being able to process the information input from the outside is output, The claim in any one of claims 1 to 6 characterized by the above-mentioned. The IC card described in the item. 8. The input / output unit for inputting / outputting information to / from the outside by sharing at least one line with the input / output unit of another functional unit, and a control unit for inputting / outputting information through the input / output unit. , And a second functional unit and a third functional unit each having a functional operating unit controlled and operated by the control unit, the input / output unit of the second functional unit (hereinafter referred to as “third input unit”). The “output unit”) and the input / output unit of the third functional unit (hereinafter referred to as “fourth input / output unit”) have input information that can be processed by the third input / output unit. Is transmitted from the third input / output unit to the fourth input / output unit and information that the fourth input / output unit can process is input from the fourth input / output unit. 3 is connected to the input / output section by a line for transmission, and the third line is connected through the line. When the fourth input / output unit inputs the information that the output unit has input the processable information, the fourth input / output unit does not output the response information to the information, and the fourth input / output unit outputs the response information through the line. When the third input / output unit inputs the information that the fourth input / output unit has input the processable information, the third input / output unit does not output the response information in response to the information. IC card characterized by. 9. The input / output unit for inputting / outputting information to / from the outside by sharing at least one line with the input / output unit of another functional unit, and a control unit for inputting / outputting information through the input / output unit. , And a second functional unit and a third functional unit each having a functional operating unit controlled and operated by the control unit, the input / output unit of the second functional unit (hereinafter referred to as “third input unit”). The “output unit”) and the input / output unit of the third functional unit (hereinafter referred to as “fourth input / output unit”) have input information that can be processed by the third input / output unit. Is transmitted from the third input / output unit to the fourth input / output unit and information that the fourth input / output unit can process is input from the fourth input / output unit. 3 is connected to the input / output section by a line for transmission, and the third line is connected through the line. If the fourth input / output unit inputs the information that the output unit has input the processable information and the fourth input / output unit determines that the information cannot be processed, the fourth The input / output unit does not output response information in response to the information, and the third input / output unit inputs the information that the fourth input / output unit has processed information through the line and the third input / output unit inputs the information. When the third input / output unit determines that the information cannot be processed, the third input / output unit does not output response information in response to the information. 10. A plurality of functional units and information transmitted from the outside are input, and the information is distributed to an input / output unit of the functional unit and transmitted according to the destination or contents thereof.
An arbitration unit for inputting information transmitted from the input / output unit of the functional unit and outputting the information to the outside, wherein the plurality of functional units input / output the information through the input / output unit. A control method for an IC card, comprising: an input / output control unit; and a functional operation unit that operates under the control of the control unit, wherein the arbitration unit sets information transmitted from the outside to its destination or content. According to the processing result, the arbitration unit selects the information transmitted from the functional unit according to the processing result and outputs the information to the outside. IC card control method. 11. A third functional unit including a first functional unit, a second input / output unit, and an input / output unit of a plurality of functional units other than the first functional unit. The arbitration unit 2 includes two input / output units, a control unit that inputs and outputs information through the input / output unit, and a functional operation unit that is controlled and operated by the control unit. And a control method for the IC card, wherein the input / output unit of the first functional unit has the information transmitted from the outside according to the destination or the content of the control unit of the first functional unit. A first allocating step of allocating to the second arbitration unit, wherein the second arbitration unit allocates the information transmitted from the input / output unit of the first functional unit according to the destination or content thereof. Other than the functional unit IC card control method characterized in that it comprises a second distributing step for distributing the plurality of functional units, the. 12. A plurality of functional units and information transmitted from the outside are input, the information is transmitted to the input / output unit of each functional unit, and the information transmitted from the input / output unit of the functional unit is transmitted. An arbitration unit for inputting and outputting the information to the outside, wherein the plurality of functional units are controlled by the input / output unit, a control unit for inputting / outputting information through the input / output unit, and the control unit. A method of controlling an IC card, each of which has a function operation unit that operates according to the above, wherein the arbitration unit can process information input from the outside in response information transmitted from the function unit. If the response information and the response information when the externally input information cannot be processed are included, a selection step of selecting and outputting only the response information when the externally input information can be processed IC card control method characterized in that it comprises.