JP2659713B2 - Processing unit for portable media - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Purpose of the Invention] (Industrial application field) The present invention receives data information transmitted from an external device such as a personal computer or another portable medium, and makes this data information portable. The present invention relates to a portable medium processing device that transmits data to a medium, receives data information transmitted from the portable medium, and sends the data information to the external device.

(Prior Art) As a portable medium, for example, an IC card is configured by embedding an IC chip such as a memory or a microcomputer in a plastic card of the same size as a credit card. Since this IC card has a large memory storage capacity and includes a control unit such as a microcomputer, the IC card itself functions as one small computer and requires various information, data, and the like that require a large storage capacity. Can be stored and processed. Plus, it ’s secure against fraud, and it ’s the size it ’s mobile.
Various uses as a shopping card and a health check card have been considered, and some of them have been put to practical use.

Conventionally, a processing apparatus for a portable medium which is connected to such a portable medium, supplies operating power to the portable medium, and exchanges information with the portable medium is shown in FIG. FIG. 4 shows the control operation.

As shown in FIGS. 3 and 4, the control unit 21 includes a transmission line.
It is connected via L1 and L2 to an upper device (not shown) such as a personal computer, another portable medium, or an external device such as a data processing device incorporating the portable medium processing device. Is transmitted and received by the transmission / reception unit 25 via the transmission line L1 and the inverter 27. The transmitting / receiving unit 25 has a built-in RAM, and in step 42, adjusts the waiting time of the received data information.

In step 43, the microcomputer, that is, the CPU 24 starts processing the received data based on a control sequence set in advance. Subsequently, in step 44, when it is determined that the content of the received data information is a control command for a portable medium, the process proceeds from step 44 to step 45. Steps
In 45, after confirming the presence of a portable medium by a signal from the card detection circuit, the mechanism driving circuit 33 and VCC,
The CLOCK / RST control circuit 34 is driven to control the drive of the mechanism system of the read / write unit 31 and to control the drive power supply VCC, clock signal CLOCK, reset signal RST, and the like supplied to the portable medium. Then step 4
In steps 6 and 47, transmission data is created based on a command from the CPU 24, and the created transmission data is sent to the interface circuit.
Send to portable media via 26.

Further, when receiving the data information from the portable medium via the transmission line L3, the control unit 21 processes the received data and then transmits this data information to the external device via the transmission line L2.

Further, in order to reduce the processing time and cost in the conventional portable medium processing device as described above, for example, RS-232C is used as an interface between the portable medium processing device and the high-order device, etc. And sends the data information back to the portable device via the transmission line, returns the data information to the host device via the transmission line, and further sends the data information from the portable medium to the host device. A processing device for a portable medium to be sent was also considered.

(Problems to be Solved by the Invention) However, in the above-described conventional example, when data information from an external device (not shown) is received via a data line, the data information based on the received data is transmitted to a portable medium, and The data information received from the external device via the transmission line is folded back, that is, the received signal is transmitted as it is as a transmission signal to the external device via the transmission line.

Therefore, in the external device, when the data information received via the transmission line is its own transmission data information that has been folded back and transmitted, the data processing becomes complicated in order to verify the received data. There was a disadvantage of becoming.

SUMMARY OF THE INVENTION The present invention has been made in view of the above, and has disclosed a processing apparatus for a portable medium that can eliminate the complexity of data processing due to collation of its own folded and transmitted data information and can further reduce the data processing time. To provide.

[Structure of the Invention] (Means for Solving the Problems) In order to achieve the above object, means provided by the present invention is connected to both a portable medium and an external device, and includes a portable medium and an external device. A portable transmission / reception device that transmits and receives data to and from a first transmission line connected to the external device for receiving data transmitted from the external device; and a first transmission line connected to the external device and connected to the external device. A second transmission line for transmitting data to be transmitted, a data transmission device connected to the portable medium, receiving data received via the first transmission line to the portable medium, and receiving data from the portable medium. Is connected to both the first transmission line and the second transmission line so as to be transmitted to an external device via the second transmission line, and is configured as a single transmission line. Line, and the first transmission line and the second transmission line. When data is received from an external device by the first transmission line, the transmission of data from the second transmission line is performed. In addition, when the data is not received from the external device through the first transmission line, the data received from the portable medium can be transmitted to the external device through the second transmission line. And control means for permitting transmission of data from the transmission line.

(Function) The present invention is to transmit data information transmitted from an external device via a first transmission line to a portable medium and return the data information to the external device via a second transmission line. In the medium processing device, if necessary, the sending out of the data information received via the first transmission line to the second transmission line is prohibited by using the prohibition means, whereby the returned data information is transmitted. And a structure for comparing the data information transmitted from the portable medium with the data information.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

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

First, the configuration of the present invention will be described. The control unit 121 is connected to a higher-level device such as a personal computer (not shown) via transmission lines L11 and L12.
, Data data such as write data information transmitted from a higher-level device (not shown), and various data information such as write data information are transmitted to the higher-level device via a transmission line L12 for transmission. .

Each of the transmission line L13 and the pair of power supply lines L4 and L5 is connected to a portable medium such as an IC card (not shown), and various data information such as write data information can be transferred via the transmission line L13. While transmitting to the portable medium, various data information such as read data information from the portable medium is received via the transmission line L13, and a predetermined power supply voltage is supplied via the pair of power lines L4 and L5. Power for driving is supplied to a portable medium (not shown).

The data information SD transmitted from the host device (not shown) via the transmission line L11 in this manner is supplied to the inverter IC4 via the inverter 127. In addition, inverter IC4
Is supplied to the input terminal of the gate circuit IC3 via the inverter IC5 and the resistors R4 and R3. This gate circuit IC3
Is connected to a transmission line L12 via an inverter 128.

That is, a transmission line L11 for receiving data information transmitted from a higher-level device (not shown) includes an inverter 127, an IC
4, is connected to a transmission line L12 for transmitting data information to a higher-level device via IC5, resistors R4 and R3, a gate circuit IC3, and an inverter 128.

For this reason, there is provided a prohibiting means for prohibiting the return of data information from the higher-level device received via the transmission line L11, that is, prohibiting output of the received signal as it is to the transmission line L12 as a transmission signal.

To specifically explain this prohibition means, the inverter IC
6. Prohibiting means is constituted by the resistor R5, the capacitor C1, and the gate circuits IC7 and IC3. That is, the output of the inverter IC4 is inverted by the inverter IC6, then delayed by a predetermined delay time by a predetermined time constant circuit including the resistor R5 and the capacitor C1, and then controlled by the gate circuit IC7 through the gate circuit IC7. Sent to terminal. At this time, the gate circuit IC3
When the signal voltage applied to the control terminal is at the L level, the output side of the gate circuit IC3 is set to the high impedance state, so that the reception line is in the mark state, and the input signal of the gate circuit IC3 is When it is at the H level, the signal voltage applied to the control terminal is also at the H level, and the output voltage H level from the gate circuit IC3 is
Output to 28, the receive line also remains marked. Thus, transmission of the folded data information SD can be prohibited.

The switching section S1 is constituted by semi-fixed switching means such as a jumper wire connecting the switching terminal and each terminal, and by separating the jumper wire between the switching terminals a and b,
The prohibition operation of the above-described prohibition means is released.

An input terminal of the power supply circuit 11 is connected to a power supply line L4 and a resistor R8, and is also connected to an output terminal of the power supply circuit 11 via a resistor R7. Monitor the power supply voltage on line L4. The card power control circuit 12 is activated based on a control signal provided from the control unit 121, and supplies card power of a predetermined power voltage between the pair of power lines L4 and L5.

FIG. 2 is a signal waveform diagram of each part of the embodiment shown in FIG.

 The operation of the present invention will be described with reference to FIG.

As shown in FIG. 2, when data information SD transmitted from a higher-level device (not shown) is received via a transmission line L11, the data information SD outputs a signal 1 via an inverter 127 and an inverter IC4. The signal 1 is inverted by the inverter IC5 and the signal 2 delayed by a predetermined delay time T0 is sent to the input terminal of the gate circuit IC3.

On the other hand, the output signal 1 of the inverter IC4 is supplied to the input terminal of the gate circuit IC7 via the switching section S1, the inverter IC6, and a predetermined delay circuit including the resistor R5 and the capacitor C1. The delay time of the predetermined delay circuit including the inverter IC6 and the resistor R5 and the capacitor C1 is equal to the delay time T0 described above.
Is set to the same time as. Therefore, the signal 3 applied to the control terminal of the gate circuit IC3 via the gate circuit IC7
And the signal timing of the signal 2 supplied to the input terminal of the gate circuit IC3 are set to the same timing.

Therefore, as shown in FIG. 2, when the L-level signal 2 is supplied to the input terminal of the gate circuit IC3, the L-level signal 3 is also supplied to the control terminal of the gate circuit IC3. When an L-level control voltage is applied to the control terminal of the gate circuit IC3 in this manner, the output side of the gate circuit IC3 is set to a high impedance, so that the transmission line L1
The signal level of 2 is set to H level. Therefore, it is possible to prohibit the data information SD received from the host device via the transmission line L11 from being folded back and transmitted to the host device again.

As the gate circuit IC3 constituting the above-described prohibiting means, a three-state gate circuit having a control terminal in addition to an input terminal and an output terminal is used, but the present invention is not limited to this. Without using an appropriate gate circuit, the configuration can be made.

Also, by providing the switching unit S1 as described above,
The release of the inhibition operation of the inhibition means can be easily set.

[Effects of the Invention] As described above, according to the present invention, for example, a transmission line for an IC card is connected to the first transmission line and the second transmission line, and the external device is connected by the first transmission line. When data is received from the first transmission line, transmission of data from the second transmission line is prohibited, and when data is not received from an external device by the first transmission line, transmission of data from the second transmission line is prohibited. To allow this, data from the IC card is always output from the second transmission line.

For this reason, in the present invention, it is not necessary for the external device to identify whether the data is the data of the external device itself or the data from the IC card, so that the data processing in the external device can be simplified. The processing time of data processing can be reduced.

Further, with a simple apparatus configuration, the cost of the portable medium processing apparatus can be further reduced.

[Brief description of the drawings]

FIG. 1 is a circuit diagram showing an embodiment of the present invention, FIG. 2 is a signal waveform diagram of each part in FIG. 1, FIG. 3 is a block diagram showing a conventional example, and FIG. 5 is a flowchart illustrating a control operation. 121 Control unit 127, 128 Inverter IC3, IC7 Gate circuit IC4, IC5, IC6 Inverter L11, L12 Transmission line

Claims (1)

(57) [Claims] 1. A portable medium processing device connected to both a portable medium and an external device for exchanging data between the portable medium and the external device, wherein the portable device is connected to the external device and transmitted from the external device. A first transmission line for receiving data to be transmitted, a second transmission line connected to the external device for transmitting data to be transmitted to the external device, and a first transmission line connected to a portable medium. Transmitting the data received via the line to the portable medium, and transmitting the data received from the portable medium to the external device via the second transmission line. A transmission line for a portable medium, which is connected to both of the transmission lines and comprises a single transmission line; and a first transmission line provided between the first transmission line and the second transmission line. In the case where data is received from an external device by means of an external device, transmission of data from the second transmission line is prohibited. Control means for permitting transmission of data from the second transmission line so that the received data can be transmitted to an external device via the second transmission line. Processing equipment.