JPH0738214B2 - Electronic device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention is for carrying out data exchange with a card reader / writer (external electronic device) by half-duplex transmission. Accordingly, the present invention relates to an electronic device such as an IC card which is activated by a control signal from the card reader / writer and sends initial response data, which means activation start after activation, to the card reader / writer.

(Prior Art) A first electronic device and a second electronic device exchange data by half-duplex transmission, and a second reset signal is released by a reset signal from the first electronic device. The second electronic device receives the command data from the first electronic device, releases the command data from the first electronic device, cancels the command data from the first electronic device, and executes a process corresponding to the command data. There is a processing system that sends to the device. In this processing system, the transmission protocol operates normally when the first electronic device and the second electronic device are known.

As an example of application of such a processing system, recently, a system using an IC card is given. Here, the transmission protocol of the IC card differs depending on the model. Therefore, in general, the IC card recognizes the release of the reset signal by the reset signal in order to inform the card reader / writer that is an external electronic device of the transmission protocol and the like, and then returns the initial response data called Answer to Reset. Is sent. The transmission timing of this initial response data is being standardized by the ISO standard recently, and if the initial response data is transmitted at this transmission timing,
The card reader / writer that received it recognizes that the IC card is communicable and starts operating.

Now, when all the initial response data is sent out as described above, the card reader / writer recognizes that the IC card is normal, so the IC card operates normally by self-diagnosis before sending all the initial response data. You have to make sure.

However, the time required for the self-diagnosis generally required is long,
Therefore, it cannot be confirmed that the IC card operates normally within the time of the sending timing, and thus the card reader / writer may recognize that the IC card is abnormal.

(Problems to be Solved by the Invention) The present invention has been made to solve the problems associated with self-diagnosis in an electronic device such as an IC card as described above, and the transmission timing of initial response data is standardized. An object of the present invention is to provide an electronic device capable of surely performing self-diagnosis even if the time required for self-diagnosis is longer than the time of the transmission timing.

[Structure of the Invention] (Means for Solving Problems) An electronic device of the present invention is an electronic device for exchanging data with an external electronic device, which is activated by a control signal from the external electronic device, and In an electronic device in which initial response data meaning start-up after activation is sent to an external electronic device, dividing means for dividing the initial response data into a plurality of initial response data, and initial response data divided by the dividing means First sending means for sending a part of the initial response data to the external electronic device within a first predetermined time from activation by the external electronic device, and a part of the initial response data by the first sending means After that, the self-diagnosis means for self-diagnosing whether or not the normal operation can be performed, and when the self-diagnosis by the self-diagnosis means determines that normal operation is possible, a part of the initial response data is Within a second predetermined time from the sending of the data, the second sending means for sending the remaining initial response data among the initial response data divided by the dividing means to the external electronic device, and the self-diagnosis means by the self-diagnosis means. When it is determined that the normal operation is impossible as a result of the diagnosis, it is provided with control means for controlling not to send the remaining initial response data.

(Operation) The initial response data is divided into a plurality of initial response data, and a part of the divided initial response data is sent to the external electronic device within a first predetermined time from the activation by the external electronic device. Then, after performing a self-diagnosis as to whether or not the normal operation can be performed, and when it is determined that the normal operation is possible, the remaining part of the initial response data remains within the second predetermined time from the sending of some initial response data. The initial response data is sent to the external electronic device, and when it is determined that the normal operation is impossible, the remaining initial response data is controlled not to be sent.

As a result, the transmission timing of the initial response data is standardized, and the self-diagnosis can be reliably performed even if the time required for the self-diagnosis is longer than the time of the transmission timing.

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

FIG. 5 shows a configuration example of a terminal device that handles an IC card according to the present invention. That is, this terminal device enables the IC card 1 to be connected to a control unit 3 including a CPU via a card reader / writer 2 as a card processing device, and the control unit 3 includes a keyboard 4, a CRT display device 5, The printer 6 and the floppy disk device 7 are connected to each other.

As shown in FIG. 3, for example, the IC card 1 makes electrical contact with a control element (for example, a CPU) 11, a nonvolatile data memory 12 whose stored contents can be erased, a program memory 13, and a card reader / writer 2. Contact part to get
It is constituted by 14, and the part within these broken lines (control element 11, data memory 12, program memory 13)
Is composed of one IC chip and is embedded in the IC card body. The program memory 13 is, for example, a mask ROM
As shown in FIG. 2, it stores a control program for the control element 11, a self-diagnosis program for performing self-diagnosis, and initial response data indicating start of activation of the IC card 1. The initial response data consists of transmission protocol specification information of the IC card 1 and the like, and is composed of a plurality of bytes of at least 2 bytes or more. Further, the data memory 12 is used for storing various data and is composed of, for example, an EEPROM.

The card reader / writer 2 exchanges data between the IC card 1 and the control unit 3. Specifically, as shown in FIG. 4, a transport mechanism 21 that transports the IC card 1 inserted into a card insertion slot (not shown) to a predetermined position, and a contact portion 14 of the set IC card 1 is electrically connected to a predetermined position. Contact unit 22 that is in contact with the control unit 23, a control unit 23 including a CPU that controls the entire control, an input / output interface circuit 24 for exchanging command data and response data between the control unit 23 and the control unit 3, And a data memory 25 for storing data.

Next, the operation of such a configuration will be described with reference to the flowchart shown in FIG. The IC card 1 is released from the reset by being supplied with a power supply and a clock from the card reader / writer 2 and then supplied with a reset signal which is a control signal for activation, and the control element 11 is activated. Then, the control element 11 first sets only the first byte (first byte) of the initial response data in the program memory 13 for the first predetermined time (IC card 1 and card reader / writer 2).
Is being standardized by the ISO standard in a time period starting from the start-up time of the control element 11 defined between (1) and (2), and is sent to the card reader / writer 2 immediately thereafter. Based on the diagnostic program, self-diagnosis is performed as to whether or not the subsequent operation can be normally performed. This self-diagnosis includes, for example, checking whether or not the RAM and registers in the control element 11 operate normally.
As a result of this self-diagnosis, if it is determined that normal operation is performed,
The control element 11 uses the initial response data in the program memory 13 for all the remaining data excluding the already transmitted head byte for the second predetermined time (the above-mentioned initial period determined between the IC card 1 and the card reader / writer 2). It is sent to the card reader / writer 2 within the time standardized by the ISO standard at the time starting from the time when the first byte of the response data is sent. In this way, after sending all the initial response data,
The control element 11 waits for command data from the card reader / writer 2. At this time, when the command data is input from the card reader / writer 2, the control element 11 executes a process according to the command data, sends response data indicating the processing result to the card reader / writer 2, and then commands again. Return to the data waiting state. On the other hand, when it is determined that the normal operation is not performed as a result of the self-diagnosis, the control element 11 enters the halt state without sending the remaining initial response data.

As described above, in the IC card 1, immediately after the start-up, only the first byte of the initial response data is first sent to the card reader / writer 2, and immediately thereafter, a self-diagnosis as to whether or not the normal operation can be performed is performed. If it is determined that the card is operable, the remaining initial response data excluding the first byte is sent to the card reader / writer 2. Thereby, the sending timing of the initial response data is standardized, and the self-diagnosis in the IC card 1 can be surely performed even if the self-diagnosis time is longer than the sending timing.

[Effect of the Invention] As described in detail above, according to the present invention, the transmission timing of the initial response data is standardized, and even if the time required for the self-diagnosis is longer than the time of the transmission timing, the self-diagnosis is surely performed. An electronic device capable of performing can be provided.

[Brief description of drawings]

FIG. 1 is for explaining one embodiment of the present invention. FIG. 1 is a flow chart for explaining the operation of the IC card, and FIG.
FIG. 3 is a block diagram showing the configuration of the IC card, FIG. 3 is a block diagram showing the configuration of the IC card, and FIG. 4 is a block diagram showing the configuration of the card reader / writer.
FIG. 1 is a block diagram showing the configuration of the terminal device. 1 ... IC card, 2 ... Card reader / writer (external electronic device), 11 ... Control element (CPU), 12 ... Data memory, 13 ... Program memory, 23 ... Control section.

Claims (3)

[Claims] 1. An electronic device for exchanging data with an external electronic device, which is activated by a control signal from the external electronic device, and sends to the external electronic device initial response data meaning activation start after activation. In the electronic device, a dividing unit that divides the initial response data into a plurality of initial response data, and a part of the initial response data among the initial response data that is divided by the dividing unit is activated from the start by the external electronic device.
First sending means for sending to the external electronic device within a predetermined time, and self-diagnosing whether or not normal operation can be performed after sending some initial response data by the first sending means. As a result of the self-diagnosis by the diagnosis means and the self-diagnosis means, when it is determined that the normal operation is possible, the initial response divided by the division means within the second predetermined time from the transmission of the partial initial response data. A second sending means for sending the remaining initial response data to the external electronic device among the data, and the result of the self-diagnosis by the self-diagnosis means, when it is determined that normal operation is impossible, the remaining initial response data An electronic device, comprising: a control unit that controls not to perform transmission. 2. The electronic device according to claim 1, wherein the initial response data comprises at least 2 bytes and is divided into a plurality of initial response data comprising at least 1 byte. 3. The electronic device according to claim 1, wherein the control signal is a reset signal.