JPS63129490A - Processing system - Google Patents

Abstract

PURPOSE:To secure a suitable timing of instruction data transmission for each type of equipment by providing a means to output a time information until the time when the following instruction data is to be received after the transmission of an initial response data signifying a start of operation to a second electronic equipment. CONSTITUTION:A time information of the time from a time when an IC card 1 which is the second electronic equipment transmits an initial response data signifying the start of operation to a time when the card 1 receives an instruction data, is included in the initial response data. Accordingly, a card reader/ writer 2 which is a first electronic equipment can recognize the timing of the transmission of an instruction data to the IC card 1 based on an extracted time information. That is, since the card reader/writer 2 receives the time information that the IC card 1 outputs along with the initial response data, the card reader/writer 2 can recognize the difference in times from the time of receiving the initial response data to the time of the instruction data transmission due to the difference of types of the IC card 1. As a result, the card reader/ writer 2 can furnish the transmission timing of an instruction data suitable for the type of the IC card 1.

Description

Detailed Description of the Invention [Objective of the Invention] (Industrial Application Field) The present invention is directed to a half-duplex transmission system in which, for example, a card reader/writer (first electronic device) and an IC card (second electronic device) perform half-duplex transmission. The IC card is activated by the control signal from the card reader/writer, and the IC card is activated by the control signal from the card reader/writer.
After the C card is activated, it sends initial response data indicating the start of activation to the card reader/writer, then receives command data from the card reader/writer, decodes the command data, and performs the corresponding process. The present invention relates to a processing method that executes processing and then transmits the processing result as response data to a card reader/writer.

(Prior Art) A first electronic device and a second electronic device exchange data through half-duplex transmission, and a control program in the second electronic device is activated by a reset signal from the first electronic device. , and the second electronic device receives and decodes the command data from the electronic device of the male 1, executes the corresponding processing, and then transmits the processing result to the first electronic device as response data. There is a processing system. This processing system operates normally if the transmission protocol is known to the first electronic device and the second electronic device.

As an application example of such a processing system, recently, IC
A system using cards is mentioned.

Here, the transmission protocol of the IC card differs depending on the model. For this reason, the IC card informs the outside (card reader/writer) of the transmission protocol, etc., so after recognizing the reset cancellation by the reset signal, it performs an answer-to-reset (A, nswe'r to Re5).
Initial response data called ``et'' is sent. Then I
The C card becomes in a state where it has command data. In this case, the time required from sending the initial response data to entering the command data waiting state also differs depending on the model. However, since there is no way to recognize the difference in time, the external device (card reader/writer) that prompts the IC card to process the initial response data using the maximum value of the time between each model. It is necessary to set the time from receiving the command data to transmitting the command data, which has the disadvantage that it is not possible to set an appropriate timing for transmitting the command data for each IC card model.

(Problem to be Solved by the Invention) As described above, the first electronic device cannot recognize the difference in time from receiving the initial response data to sending the command data due to the difference in the model of the second electronic device. Therefore, the first electronic device has the disadvantage that it is not possible to determine an appropriate timing for transmitting command data for each model of the second electronic device.

SUMMARY OF THE INVENTION The present invention eliminates the above-mentioned drawbacks by allowing the first electronic device to recognize the difference in time from receiving the initial response data to sending the command data due to the difference in the model of the second electronic device. The purpose of the first electronic device is to provide a processing method that can achieve appropriate timing for transmitting command data for each model of the second electronic device.

[Structure of the Invention (Means for Solving Problems)] The present invention provides a first electronic device and a second electronic device that exchange data through half-duplex transmission, and control from the first electronic device. The second electronic device is activated by the signal, and after activation, the second electronic device transmits initial response data indicating the start of activation to the first electronic device, and receives command data from the first electronic device. In a processing method in which the command data is decoded by receiving the command data, the processing result corresponding to the command data is executed, and the processing result is transmitted to the first electronic device as response data, the second electronic device initiates the activation start. This means is provided with means for outputting time information until receiving the initial response data and receiving the instruction data of the method.

(Function) By the first electronic device receiving the above-mentioned temporal information outputted by the second electronic device, the time period from receiving the initial response data to sending out the command data due to the difference in the model of the second electronic device is The time difference can be recognized by the first electronic device. Therefore, the first electronic device can determine the appropriate timing for transmitting command data for each model of the second electronic device.

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

FIG. 8 shows an example of the configuration of a card handling device used as a terminal device in, for example, a home banking system or a shopping system to which the IC card according to the present invention is applied. That is, this device
The C card 1 can be connected to a control section 3 consisting of a CPU or the like via a card reader/writer 2 as a card processing device, and the control section 3 is equipped with a keyboard 4, a CRT display device 5, a printer 6, and a floppy disk device 7. It is configured by connecting.

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 Fig. 6. 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 repeated use 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 encryption standard. 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 various functions, the IC card 1 has 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.
This is used to store initial response data indicating the start of activation of the card 1. The data memory 16 is used to store various data and is composed of, for example, an EEPROM.

The card reader/writer 2 is used to exchange function codes and data between the IC card 1 and the control section 3.

Specifically, as shown in FIG. 7, 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 section 18 of the IC card 1 set at a predetermined position. a contact section 22 that is electrically contacted, a control circuit 23 consisting of a CPU that controls the entire system, and an input/output interface for exchanging command data and response data between the control circuit 23 and the control section 3. It is composed of a circuit 24, a data memory 25 for storing data, and a decrement timer circuit 26 which, when an initial value is given, becomes rOJ after a period of time equal to that value.

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

First, the IC card 1 operates according to the flowchart shown in FIG. In other words, card reader/writer 2
When the reset signal, which is a start-up control signal, is set to a reset release state, the control element 15 outputs initial response data in the program memory 17 indicating the start of start-up within a predetermined time. This initial response data consists of transmission protocol specification information of the IC card 1 and time information from when the initial response data indicating the start of activation until it becomes ready to accept command data from the card reader/writer 2. ing. Now, after outputting the above 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, card reader/writer 2
When command data is input from the control element 15, the control element 15 executes basic functions according to the command data, outputs response data indicating the processing result to the card reader/writer 2,
Returns to the state with 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. 3, for example, and may be in the form of only a function code as shown in FIG. As shown in b), there is a form in which data is added to the function code.

The card reader/writer 2 operates according to the flowchart shown in FIG. That is, in the steady state, it is in a state of waiting for command data from the control section 3 (step S1). At this time, when command data is input from the control section 3, the control circuit 23 proceeds to step S2 and determines whether the input command data is an IC card import command. If it is an IC card import command, the control circuit 23 proceeds to step S3 and enters the IC card insertion state. At this time, if it is determined that the IC card 1 has not been inserted within the predetermined time, the control circuit 23 performs step S.
The process proceeds to step 4, where response data indicating that the IC card is not inserted is output to the control unit 3, and the process returns to the command data waiting state. If it is determined that the IC card 1 has been inserted within the predetermined time, the control circuit 23 proceeds to step 35.86, supplies power, clock, etc. to the IC card 1, and
(hereinafter, these operations are referred to as activation). Then, the control circuit 23 proceeds to step S7, and
It enters a state of waiting for initial response data, which means the start of activation from the C card 1. At this time, if the initial response data is not received within the predetermined time, the control circuit 23 proceeds to step S8,
Response data indicating a non-standard card is output to the control unit 3 and the process returns to the command data waiting state. When the initial response data is received within the predetermined time, the control circuit 23 proceeds to step S9, extracts temporal information from the received initial response data, and sets it in the decrement timer circuit 26 as an initial value.

Next, the control circuit 23 proceeds to step 810, and the control circuit 23 proceeds to step 810.
It is determined whether the instruction data from is a macro instruction. If it is not a macro instruction, the control circuit 23 executes step S1.
1, the response data to the command data is output to the control section 3, and the state returns to the command data holding state again. If it is a macro instruction, the control circuit 23 proceeds to step 812 and determines whether the macro instruction has ended (or not after the final instruction data in the macro instruction has been sent to the IC card 1).

If the macro instruction has ended, the control circuit 23 proceeds to step 81.
1, outputs response data to the macro command to the s+ control section 3, and returns to the command data waiting state. If the macro instruction has not ended, the control circuit 23 proceeds to step S13 and enters a waiting state until the decrement timer circuit 26 becomes "0". The decrement timer circuit 26
”, the control circuit 23 proceeds to step S14 and outputs the command data to be sent to the IC card 1. Then, the control circuit 23 proceeds to step S15, and the IC card 1
It enters a state of waiting for response data from. At this time, if the response data from the IC card 1 is not received within a predetermined period of time, the control circuit 23 proceeds to step 816, outputs response data indicating timeout to the control unit 3, and then outputs the command data again.
Return to the state of waiting for the evening. Upon receiving the response data from the IC card 1 within a predetermined time, the control circuit 23 performs step 810.
Return to and repeat until all macro instructions are completed.

Note that in step S2, if it is not an IC card import command, the control circuit 23 proceeds to step 817, and reads the IC card.
It is determined whether or not after card 1 has been activated. If the IC card 1 has not been activated yet, the control circuit 23 proceeds to step 818, outputs response data indicating deactivation to the control unit 3, and returns to the instruction data waiting state. If the IC card 1 has been activated, the control circuit 23 moves to step S13.

In this way, by including in the initial response data the time information from when the IC card 1 sends the initial response data indicating the start of activation until it receives the command data, the card reader/writer 2 The above-mentioned temporal information is extracted from the initial response data, and the timing of sending command data to the IC card 1 can be recognized based on the extracted temporal information. That is, when the card reader/writer 2 receives the above temporal information that the IC card 1 outputs together with the initial response data, the IC card 1 uses the temporal information.
The card reader/writer 2 detects differences in time between receiving initial response data and sending command data due to differences in models. can. Therefore, card reader/writer 2
By using the above-mentioned time information, it is possible to determine an appropriate timing for transmitting command data for each model of IC card 1.

In the embodiment described above, the temporal information in the initial response data is extracted and set as an initial value in the decrement timer circuit 26, and immediately before the command data is sent to the IC card 1, the decrement timer circuit 26 is activated. Although the method for confirming that rOJ has been described has been described, if the decrement timer circuit 26 becomes rOJ after setting the temporal information, a method may be adopted in which the process moves to step S10. That is, the process of step 813 may be provided between steps S9 and 810. Further, in this case, the decrement timer circuit 26 may be realized not by a hard timer but by a soft timer having a function similar to that of a hard timer.

Further, in the above embodiment, the temporal information is included and registered in the initial response data in advance, but the information other than the temporal information in the initial response data and the temporal information are registered separately. , a method may be adopted in which both are combined at the time of transmission.

Further, in the above embodiment, the first electronic device is the card reader/writer 2 and the second electronic device is the IC card 1.
The electronic device may be used as the card reader/writer 2. In short, a first electronic device and a second electronic device exchange data through half-duplex transmission, the second electronic device is activated by a control signal from the first electronic device, and the second electronic device After startup, transmits initial response data indicating the start of startup to the first electronic device, then receives command data from the first electronic device, decodes the command data, and performs the corresponding process. Any processing method that executes the processing and then transmits the processing result to the first electronic device as response data is applicable.

[Effects of the Invention] As detailed above, according to the present invention, the first electronic device can compensate for the difference in time from receiving the initial response data to sending the command data due to the difference in the model of the second electronic device. It is possible to provide a processing method that allows the first electronic device to recognize the timing of sending command data appropriately for each model of the second electronic device.

[Brief explanation of the drawing]

The figures are for explaining one embodiment of the present invention, and FIG. 1 is a flowchart explaining the operation of a card reader/writer, FIG. 2 is a flowchart explaining the operation of an IC card, and FIG. 3 is a flowchart explaining the operation of a card reader/writer.・A diagram showing the format of command data output from the writer, FIG. 4 is a diagram showing the format in the program memory of the IC card, FIG. 5 is a block diagram showing the configuration of the IC chip built into the IC card, and FIG. Figure 7 shows the functional blocks of an IC card.
FIG. 8 is a block diagram showing the configuration of the card reader/writer, and FIG. 8 is a block diagram showing the configuration of the card handling device. 1...IC card (second electronic device), 2...
...Card reader/writer (first electronic device), 1
5... Control element (CPU), 16...
Data memory, 17...Program memory, 2
3... Control circuit, 26... Decrement timer circuit. Applicant's agent Patent attorney Takehiko Suzue (b) Figure 2 Figure 304 Figure 4 = -J Figure 5 Figure 6

Claims (8)

[Claims] (1) The first electronic device and the second electronic device exchange data by half-duplex transmission, and the second electronic device is activated by a control signal from the first electronic device, and the second electronic device is activated by a control signal from the first electronic device, and
After startup, the electronic device transmits initial response data indicating the start of startup to the first electronic device, and then receives command data from the first electronic device to decode the command data and respond accordingly. In the processing method in which the processing result is transmitted as response data to the first electronic device after executing a process, the second electronic device receives the next command data after transmitting the initial response data indicating the start of the activation. A processing method characterized by comprising means for outputting temporal information up to the point in time. (2) The processing method according to claim 1, wherein the temporal information is included in initial response data indicating the start of activation. (3) The processing method according to claim 1, wherein the control signal is a reset signal. (4) The processing method according to claim 1, wherein the temporal information is registered in advance in the second electronic device. (5) The processing method according to claim 1, wherein the initial response data indicating the start of activation is registered in advance in the second electronic device. (6) The processing method according to claim 1, wherein the initial response data indicating the start of activation includes transmission protocol specification information of the second electronic device. (7) The processing method according to claim 1, wherein the second electronic device is a so-called IC card. (8) The processing method according to claim 7, wherein the first electronic device is a card processing device for reading and/or writing data to an IC card.