JPH05210769A - Ic card reader/writer - Google Patents

Abstract

PURPOSE:To allow this IC card reader/writer to correspond to both of an IC card based upon ISO standards and an IC card having the same standards as the ISO standards only in its appearance shape and contact part by providing the IC card reader/writer with an ISO standard signal forming part and an other card signal forming part. CONSTITUTION:The card reader/writer 11 has a contact part 12 based upon the ISO standards. The ISO standard signal forming part 17 forms a clock signal, a reset signal and a memory writing voltage necessary for an IC card based upon the ISO standards. The other card signal forming part 18 forms signals (e.g. a memory control signal and a memory writing signal) necessary for another IC card excluded from the ISO standards. A data processing part 16 judges the sort of a set IC card 13 based upon card data inputted from the card 13. A signal switching circuit 15 is controlled so as to be switched in accordance with the judged result to select either one of two signals outputted from the signal forming parts 17, 18.

Description

Detailed Description of the Invention [Industrial applications]

The present invention relates to an IC card reader / writer, and more particularly to an IC card reader / writer suitable for reading / writing an IC card with contacts (external terminals).

[0002]

2. Description of the Related Art FIG. 3 is a block diagram of a conventional IC card reader / writer and an ISO (International Organization for Standardization) standard IC card which is a read / write target. In the figure,
The card reader / writer 31 includes a controller 33 that controls the IC card 32 and a contact portion 3 of the IC card 32.
4 has a contact portion 35 for contacting the data transfer unit 4 and transferring data. The controller 33 sets the operating power supply VCC of the IC card 32, the data memory write power supply VPP, the CPU clock CLK and the reset signal RST to ISO7816.
Control according to the control method specified in -3.

The IC card 32 is a card conforming to the ISO 7816 standard, and the CPU 3 for controlling its operation.
6. A program memory 37 storing operation programs and a data memory 38 storing application data.

Card reader / writer 31 and IC card 32
The interface and control with the IC card 3 are performed based on the ISO 7816 standard, and the IC card 3 is controlled by controlling the operating power supply VCC (C1), the reset signal RST (C2) and the clock CLK (C3) from the card reader / writer 31.
2 becomes operable, and the contents of the data memory 38 in the IC card 32 can be accessed.

That is, in the IC chip 32 having a one-chip structure in which the CPU 36, the program memory 37, and the data memory 38 are contained in one chip, external wiring between the CPU 36 and the data memory 38 is unnecessary, and the contents of the data memory 38 are stored. Since the reading and writing can be performed by the control described above, there is no fear that the contents of the data memory 38 will be tapped, and the confidentiality thereof is excellent.

[0006]

However, although the IC card 32 having the above-described structure has high security against forgery or the like in the above-mentioned point, it has a high manufacturing cost because the CPU 36 is built in the chip, which hinders its popularization. It was.
Therefore, the advent of an inexpensive IC card that is highly popular is desired.

As this low-cost IC card, it is conceivable that only the external shape of the card and the contact portion are compliant with the ISO standard, the data memory 38 is provided, and the data is serially transferred. However, since the IC card having such a configuration cannot be controlled based on the ISO7816 standard, a dedicated card reader / writer is required.

The external shape of this IC card is ISO
Since it is completely the same as a standard IC card, there is no distinction in appearance, and since a dedicated card reader / writer is required as described above, when considering mixed operation with an ISO standard IC card, There is a problem of identification of the IC card and a problem that two types of card reader / writers are required for each IC card.

The present invention has been made in view of the above points, and provides an IC card reader / writer which is compatible with both an ISO standard IC card and an IC card having the same external shape and contact part as the ISO standard. The purpose is to

[0010]

An IC card reader / writer according to the present invention comprises an IC card insertion / attachment contact portion conforming to the ISO standard, and a first signal generating portion for generating a signal required for the ISO standard IC card. , A contact is made by switching between a second signal generation unit that generates a signal necessary for an IC card whose appearance shape and contact unit are the same as the ISO standard, and two systems of signals output from the first and second signal generation units. And a data processing unit that controls switching of the signal switching circuit based on card data input from the IC card via the contact unit.

[0011]

[Function] Based on the card data input from the IC card, the attributes of the card (for example, in the case of an ISO standard IC card, a reset response (Answer-to-Reset) signal)
Is identified and a necessary signal is supplied to the IC card according to the identification result. As a result, different types of IC cards can be processed by the same card reader / writer without requiring the operator handling the IC cards to determine the card type and without preparing an expensive card reader / writer for each IC card. .

[0012]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a circuit diagram showing an embodiment of the present invention. In the figure, a card reader / writer 11 has a contact portion 12 conforming to the ISO standard, and a contact portion 14 of an IC card 13 is in contact with this contact portion 12. The card reader / writer 11 supplies the IC card 13 with an I / O signal (C7), operating power supplies Vcc (C1) and GND (C5) as common signals. Further, each of the contacts C2, C3, C5 is connected to the signal switching circuit 15.

The I / O signal from the IC card 13 is supplied to the data processing section 16. The data processing unit 16 determines the type of the IC card 13 based on the input I / O signal and, at the same time, transfers data to and from the IC card 13. The ISO standard signal generator 17 generates a clock signal CLK, a reset signal RST, and a memory write voltage VPP necessary for an ISO standard IC card. The other card signal generation unit 18 generates a signal (for example, a memory control signal, a memory write voltage) necessary for another IC card having the same external shape and contact portion as the ISO standard.

The ISO standard signal generator 17 and the other card signal generator 18 are independent of each other, and the signals of these two systems are supplied to the signal switching circuit 15. The data processing unit 16 is I
The type of the IC card that is set is discriminated based on the card data input from the C card 13, and the signal switching circuit 15 is switched and controlled according to the discrimination result. Signal generator 1
One of the signals of the two systems of 8 is selected.

Next, the processing procedure executed by the processor of the data processing unit 16 in the card reader / writer 11 having the above-mentioned configuration will be described with reference to the flowchart of FIG. First, the processor of the data processing unit 16 switches the signal switching circuit 15 to the ISO standard signal generation unit 17 side (step S1) before starting the processing of the IC card 13, and then the reset signal RST to the IC card 13.
Is supplied to reset the card (step S2). Upon receiving the reset signal RST, the IC card 13 returns a reset response (Answer-to-Reset).

Subsequently, the processor of the data processing unit 16 determines whether or not the reset response from the IC card 13 is correct (step S3), and if it is correct, the subsequent processing is performed as an ISO standard IC card (step S3). S
4). If it is determined that the reset response from the IC card 13 is not correct, the signal switching circuit 15 is switched to the other card signal generation unit 18 side (step S5), and then the data of the memory area in another predetermined card is changed. The card ID indicating the card identification is read in (step S6).

Then, it is judged whether or not the read card ID is correct data (step S7), and when it is judged that the data is correct, the following process is performed as a card other than the ISO standard (step S8). If it is determined to be incorrect, processing such as discharging the set IC card is performed (step S9), and the processing ends.

[0018]

As described in detail above, according to the present invention, the card type is identified based on the card data input from the IC card, and a necessary signal is supplied to the IC card according to the type. Therefore, the IC card of the ISO standard and the external shape and the shape thereof are not required to be determined by the operator who handles the IC card, and without preparing an expensive card reader / writer for each card. Only the contact part can process the same IC card as the ISO standard with the same card reader / writer.

[Brief description of drawings]

FIG. 1 is a circuit diagram showing an embodiment of the present invention.

FIG. 2 is a flowchart showing a processing procedure according to the present invention.

FIG. 3 is a configuration diagram showing a conventional example.

[Explanation of symbols]

 11 Card Reader / Writer 12, 14 Contact Section 13 IC Card 15 Signal Switching Circuit 16 Data Processing Section 17 ISO Standard Signal Generation Section 18 Other Card Signal Generation Section

Claims (1)

[Claims] 1. An IC card insertion / contacting part conforming to the ISO standard, a first signal generating part for generating a signal required for the IC card conforming to the ISO standard, and an external shape and a contact part are the same as those of the ISO standard.
A second signal generating section for generating a necessary signal for the C card; a signal switching circuit for switching between two systems of signals output from the first and second signal generating sections and supplying the signal to the contact section; An IC card reader / writer, comprising: a data processing unit that controls switching of the signal switching circuit based on card data input from an IC card via a contact unit.