JPS63142493A - Portable electronic device - Google Patents

Abstract

PURPOSE:To optionally register initial response data by forming an area capable of registering the initial response data in a data memory and registering the initial response data in the area by an external application. CONSTITUTION:An IC card consists of a CPU 15, a non-volatile data memory whose stored contents can be erased, a program memory 17, and a contact part 18 to be electrically contacted with a card reader/writer. Since the area capable of registering initial response data is formed in the data memory 16, the initial response data can be registered in the area by an external application.

Description

[Detailed Description of the Invention] [Object of the Invention] (Field of Industrial Application) The present invention is applicable to, for example, a card reader/writer (external package@).
data is exchanged between the card reader and writer using half-duplex transmission, and is activated by a control signal from the card reader/writer.After activation, initial response data indicating the start of activation is output to the card reader/writer, and then the card reader/writer・It is a so-called IC card that receives command data from a writer, decodes the command data, executes the corresponding processing, and then outputs the processing results as response data to the card reader/writer. Relating to portable electronic devices.

(Prior art) Data is exchanged with a card reader/writer using half-duplex transmission, a control program is started by a reset signal from the card reader/writer, and then command data from the card reader/writer is sent and received. Receive and decipher,
An I/O device that executes the corresponding processing and then outputs the processing result to the card reader/writer as response data.
I have a C card. Such an IC card operates normally if the card reader/writer knows its transmission protocol.

By the way, the transmission protocols of IC cards generally differ depending on the model. Therefore, in order to inform the card reader/writer, which is an external device, of the transmission protocol, etc., the IC card sends an answer-to-reset after recognizing reset 1 to release by the reset signal.
Initial response data called Re5et) is output to the card reader/writer. Thereafter, the IC card enters a state in which it has command data. In this case, the initial response data is
It consists of card transmission protocol specification information and IC card-specific information, and is registered in advance in a mask ROM or the like as a fixed parameter when the IC card is manufactured.

However, in conventional IC cards, the initial response data is registered in a mask ROM or the like at the time of manufacture, so it is impossible to change the initial response data after registration. Therefore, if the contents of the initial response data are updated or added after manufacturing, there is a problem in that the IC card must be manufactured again.

(Problems to be Solved by the Invention) As mentioned above, the initial response data that is output after startup is fixedly registered in advance as a fixed parameter, so it is not possible to update or add the contents of the initial response data. There's a problem.

SUMMARY OF THE INVENTION Therefore, the present invention aims to solve the above-mentioned problems and provides a portable electronic device in which initial response data can be arbitrarily registered, thereby allowing content updates and additions to the initial response data to be carried out arbitrarily. purpose.

[Structure 1 of the Invention (Means for Solving Problems) The present invention exchanges data with an external device, is activated by a control signal from the external device, and after activation, means to start activation. Output initial response data to external device,
A portable electronic device that receives command data from an external device, decodes the command data, executes the corresponding processing, and then outputs the processing result to the external device as response data. and a registration means for selectively registering the initial response data in the nonvolatile memory.

(Function) Using the registration means, initial response data can be arbitrarily registered in the nonvolatile memory by an external application. Therefore, even after the portable electronic device is manufactured, the contents of the initial response data can be updated or added as desired.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 10 shows an example of the configuration of a card handling device used as a terminal HH in a home banking system or shopping system, to which the IC card according to the present invention is applied.

That is, this device connects the IC card 1 to a card reader.
It is configured such that it can be connected to a control section 3 consisting of a CPU or the like via a writer 2, and a keyboard 4, a CRT display device W15, a printer 6, and a floppy disk device 7 are connected to the control section 3.

The IC card 1 is held by the user, and is used to refer to a personal identification number known only to the user when purchasing products, etc., and to store necessary data. Its functional blocks are shown in Figure 9. It is comprised of parts that execute basic functions such as a read/write section 11, a password setting/password verification section 12, and an encryption/decryption section 13, and a supervisor 14 that manages these basic functions. The read/write section 11 has the function of reading, writing, or erasing data from/to the card reader/writer 2.

The password setting/password verification unit 12 has a function of storing the password set by the user and prohibiting reading of the password, as well as verifying the password after setting the password and granting permission for subsequent processing. The encryption/decryption unit 13 is
For example, it performs encryption to prevent leakage and forgery of communication data when transmitting data from the control unit 3 to another terminal device via a communication line, and decrypts encrypted data. DES (Data Encr.
This function performs data processing according to an encryption algorithm with sufficient cryptographic strength, such as yption 5tandarcN.

The supervisor 14 has the function of decoding the function code input from the card reader/writer 2 or the function code to which data is added, and selecting and executing a necessary function among the basic functions.

In order to perform these functions, the IC card 1 is equipped with a control element (for example, a CPU) as shown in FIG.
15. Nonvolatile data memory whose memory contents can be erased 1
6. Consists of a program memory 17 and a contact part 18 for obtaining electrical contact with the card reader/writer 2, of which the part within the broken line (control element 15, data memory 16, program memory 17)
is composed of one IC chip.

The program memory 17 is composed of, for example, a mask ROM, and as shown in FIG. 1
and a parameter area 172 that stores initial response data indicating the start of activation. The initial response data in the parameter area 172 is stored (registered) when the IC card 1 is manufactured, and includes, for example, transmission protocol specification information of the IC card 1 and information specific to the IC card 1.

The data memory 16 is composed of, for example, an EEPROM, and as shown in FIG. 6, includes a plurality of data areas 161 used for storing various data, and a parameter area 162 in which initial response data is stored (registered). configured. Figure 7 shows parameter area 1 of data memory 16.
62 data strings are shown. Here, data size, n byte data and BCG from specific point AAAA are shown.
It consists of code. In this embodiment, the maximum number of data that can be registered in the parameter area 162 is 32 bytes of initial response data.

Next, the operation in such a configuration will be explained.

First, initial response data registration processing by an application will be described with reference to the flowchart shown in FIG. Upon receiving the initial response data registration command data from the card reader/writer 2, the control element 15 inputs the input data (initial response data) added to the received command data.
By checking the size of its input data (
It is determined whether the initial response data) can be stored in the parameter area 162 of the data memory 16. As a result of this judgment, if the input data (initial response data) can be stored, the control element 15 stores the input data (initial response data) in the parameter area 162 of the data memory 16.
is added, and response data indicating completion of registration is output to the card reader/writer 2. Further, as a result of the above judgment, if the data cannot be stored, the control element 15 outputs response data indicating that the data size is over to the card reader/writer 2.

Next, the overall processing operation will be explained with reference to the flowchart shown in FIG. When the reset signal, which is a start-up control signal, from the card reader/writer 2 is set to a reset release state, the control element 15 initializes and checks whether initial response data is registered in the parameter area 162 of the data memory 16. to judge. As a result of this judgment, if the initial response data is registered, the control element 1
5 checks the validity of the initial response data in the parameter area 162 of the data memory 16, and if it is normal, outputs the initial response data in the parameter area 162 of the data memory 16 to the card reader/writer 2. Additionally, if the initial response data is not registered as a result of the above judgment,
Alternatively, if the initial response data is abnormal, the control element 15 transfers the initial response data in the parameter area 172 of the program memory 17 to the card reader.
Output to writer 2. Now, after outputting the initial response data, the control element 15 enters a state in which it has command data from the card reader/writer 2. At this time, when command data is input from the card reader/writer 2, the control element 15 executes the basic function according to the command data, outputs response data indicating the processing result to the card reader/writer 2, and then returns to the card reader/writer 2. Return to the steady state of waiting for command data.

Note that the command data output from the card reader/writer 2 to the IC card 1 has a format as shown in FIG. As shown in b), there is a form in which data is added to the function code.

FIG. 4 shows reading and writing of initial response data from program memory 17 and data memory 16. FIG. 4(a) shows this embodiment, and when the initial response data is registered by the application and the initial response data in the parameter area 162 of the data memory 16 is normal, the initial response data in the parameter area 162 of the data memory 16 is ""Reading2" is output. In addition, if the registration by the application has not yet been completed, or if the registration has been completed but the initial response data in the parameter area 162 of the data memory 16 is abnormal, the initial response data in the parameter area 172 of the program memory 17 is
” will be output.

As described above, the initial response data to be output after reset release is selectively switched.

FIG. 4(C) is an example of application of the present invention.

However, it is assumed that the transmission protocol specification information that informs the card reader/writer 2 of the transmission protocol is unchanged, and the transmission protocol specification information in the parameter area 172 of the program memory 17 is used. First, Figure 4(b)
The initial response data (not including transmission protocol specification information) from the application is registered in the parameter area 162 of the data memory 16, and the output after reset release is checked for the registration status, and if registered, the parameters in the program memory 17 are registered. Transmission protocol specification information in area 172 and parameter area 162 of data memory 16
and the initial response data (not including transmission protocol specification information) within, and output as "X5! Output 2". If it is not registered, the initial response data in the parameter area 172 of the program memory 17 is
” is output.

Next, FIG. 4(C) shows that when initial response data (not including transmission protocol specification information) is registered by an application, the initial response data is combined with the transmission protocol specification information in the parameter area 172 of the program memory 17. and the parameter area 162 of the data memory 16.
Register. The output after the reset is canceled depends on the registration state, and if it is registered, it will be output as "Read 2", and if it is not registered, it will be output as "Read 1".

In this way, we have created an area in the data memory where initial response data can be registered, and we have made it possible for an external application to register initial response data in this area. Any response data can be registered. Therefore, even after the IC card is manufactured, the contents of the initial response data can be updated or added at will.

In the above embodiment, the initial response data is stored in the data memory.
We have explained the case where an area is provided where the data can be registered and initial response data is registered in this area.For example, if a non-volatile memory for initial response data registration is provided separately from the data memory, Alternatively, the initial response data may be registered.

[Effects of the Invention] As detailed above, according to the present invention, it is possible to provide a portable electronic device in which initial response data can be arbitrarily registered, and the contents of the initial response data can be updated or added at will. .

[Brief explanation of the drawing]

The figures are for explaining one embodiment of the present invention, and FIG. 1 is a flowchart explaining initial response data registration processing by an application, FIG. 2 is a flowchart explaining the overall processing operation, and FIG. The figure shows the format of command data output from the card reader/writer, Figure 4 explains the initial response data of the program memory and reading and writing of the initial response data of the data memory, and Figure 5 shows the program memory. FIG. 6 is a diagram showing the configuration of the data memory, FIG. 7 is a diagram showing the data configuration of the parameter area of the data memory, FIG. 8 is a block diagram showing the configuration of the IC chip built into the IC card, and FIG. The diagram is I
FIG. 10 is a diagram showing the functional blocks of the C card, and is a block diagram showing the configuration of the card handling device. 1...IC card (portable electronic device), 2.
...Card reader/writer (external device), 15.
... Control element (CPU), 16 ... Data memory (nonvolatile memory), 161 ... Data area, 162 ... Parameter area, 17
...Program memory, 171 ...Program area, 172 ...Parameter area. Applicant's Representative Patent Attorney Takehiko Suzue Figure 2 Figure 5 Figure 6 Figure 7 Figure 9

Claims (4)

[Claims] (1) Exchanging data with an external device, starting with a control signal from the external device, and after starting, outputting initial response data indicating the start of starting to the external device, and then receiving commands from the external device After receiving the data and decoding the instruction data and executing the corresponding process,
A portable electronic device that outputs the processing result as response data to an external device, comprising: a non-volatile memory; and a registration means for selectively registering the initial response data in the non-volatile memory. Possible electronic devices. (2) The non-rewritable initial response data is fixedly registered in advance, and depending on the registration state of the initial response data in the non-volatile memory, the non-rewritable initial response data or 2. The portable electronic device according to claim 1, wherein the registered initial response data is selectively output to an external device. (3) The portable electronic device according to claim 1, wherein the control signal is a reset signal. (4) The portable electronic device according to claim 1, wherein the initial response data is composed of transmission protocol specification information of the portable electronic device and information specific to the portable electronic device. electronic equipment.