JP2703534B2 - Portable media and substrate for portable media - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention
U, IC card with built-in IC chip such as data memory
And portable media such as 2. Description of the Related Art Recently, an IC card has been developed and put into practical use as a memory card for writing data. This IC
The card has a microprocessor (CPU), PROM
Alternatively, an I / O such as a data memory composed of an EEPROM may be used.
A C chip is built in. The above-mentioned microprocessor (CPU) and car
The terminal is connected to a terminal on the surface of the memory, and inputs and outputs data to and from the outside through this terminal, and writes and reads data to and from the data memory under the control of the CPU. In such an IC card, correctly writing data to the data memory is an important part of its function. [0004] In particular, I require identification by password collation or the like.
In the C-card, by writing the evidence indicating the mismatch of verification into the data memory, even if the state of the card is initialized, a trace of fraud remains, so that high security can be obtained. ing. As such an IC card, Japanese Patent Application Laid-Open No.
One disclosed in Japanese Patent No. 464747 is known. However, in the above case, it is generally necessary to apply a voltage (21 V) higher than a normal control voltage (reproduction voltage: 5 V) to a specific terminal.
There is no means for guaranteeing the voltage applied to the terminal. For this reason, when writing data to the data memory, the write voltage fluctuates, causing a write failure or
Alternatively, there is a problem that write data is lost. That is, as described above, when the evidence indicating the mismatch is written to the data memory, since no trace of fraud is left, the initialization of the card and the password collation are repeatedly performed. -There was a danger that it would be possible to steal the password of the security officer, and there was a serious problem in terms of security. Further, if data to be written in the IC card is lost, a problem occurs when the IC card is used thereafter, and the reliability of the IC card is reduced. SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned drawbacks, and has a built-in boosting means in a portable medium and controls the operation of the medium by the portable medium itself. It is intended to compensate for the voltage applied to the data memory, solve the problem of writing failure in the data memory, such as traces of fraud and the absence of write data, and to provide a safe and reliable portable medium. is there. According to the present invention, in order to solve the above-mentioned problems, according to the first aspect of the present invention, information is exchanged with the outside.
And a terminal to which a drive voltage for driving the portable medium, which is provided on the surface of the portable medium and electrically connected to an external device, is applied from the external device, and A connection unit having a terminal for inputting and outputting data to and from an external device, an interface circuit for exchanging information with the outside via the connection unit, a nonvolatile data memory for storing data, and the connection unit A boosting circuit that boosts an operating voltage applied from outside via the memory, generates a write voltage higher than the operating voltage, and applies the write voltage to the nonvolatile data memory; and the interface operates by the operating voltage applied from the outside. An internal memory for temporarily storing data received via the circuit, and write data temporarily stored in the internal memory. When writing to the non-volatile data memory, the booster is operated to supply a write voltage generated by the booster to the non-volatile data memory to perform a write operation. A CPU for determining whether or not the write data has been normally written to the data memory, and outputting a result of the determination to an external device. The interface circuit, the non-volatile data memory, the booster circuit, and the CPU The mobile device provided on the substrate
This constitutes a band-capable medium . According to the second aspect of the present invention, information exchange with the outside is performed.
Is used for portable media on which data is stored
An interface circuit for exchanging information with the outside, a nonvolatile data memory for storing data, and a step-up of an operation voltage applied from outside to generate a write voltage higher than the operation voltage And a booster circuit for applying the data to the nonvolatile data memory, and an internal memory that operates with the operating voltage applied from the outside and temporarily stores data received through the interface circuit. At the time of a write operation of writing the temporarily stored write data to the nonvolatile data memory, the booster is operated to supply a write voltage generated by the booster to the nonvolatile data memory to perform a write operation, In this writing, it is determined whether or not the write data has been normally written to the nonvolatile data memory. CPU outputs a different result to the external device
And the interface circuit, the non-volatile data memory, the booster circuit, and the CPU are provided on one substrate .
It was a thing. Embodiments of the present invention will be described below with reference to the drawings. In FIG. 2, reference numeral 1 denotes an IC card as a portable medium. A connect portion 2 is provided on the surface of the IC card 1, for example, a plurality of terminals 2a,
.. 2h. The terminal 2a is connected to an operating power supply voltage (+5
V), terminal 2b is for grounding, terminal 2c is for clock signal, terminal 2d is for reset signal, and terminals 2e to 2h are for data.
It is for data input / output. In the IC card 1, a first
As shown in the figure, a control CPU (Central Processing Unit) 3, a control program, a password (for example, 4 digits), data, etc. are recorded, and EE
It comprises a PROM or a data memory 4 composed of a PROM, an interface circuit 5, and a booster circuit 6. Each of the above components is constituted by an IC chip and is provided on one substrate. The interface circuit 5 and the connection unit 2 are wired. The booster circuit 6 is connected to the terminal 2 of the connection unit 2.
a for generating a write voltage (Vpp) of 21 volts (V) and a control voltage (Vcc ') of 5 volts (V) in accordance with an operating voltage (Vcc) of 5 V from a.
-It is composed of a DC converter. As a result, the write voltage (Vpp) is applied to the data memory 4 and the control voltage (Vcc ') is applied to the CPU 3, the data memory 4, and each section of the interface circuit 5. It has become. However, the application of the write voltage (Vpp) to the data memory 4 by the booster circuit 6 is performed in accordance with a control signal supplied from the CPU 3 when writing data. FIGS. 3 and 4 show the configuration of an IC card handling machine 10 as a terminal according to the present invention. That is, 11 is a CPU for controlling the whole.
(Central processing unit), 12 is a keyboard for inputting data, 13 is a CRT display device, and 14 is a ROM in which a control program is stored.
(Read only memory), 15 is a RAM (random access memory) for storing data, 16 is a dot printer for outputting various print data, and 17 is a floppy disk insertion slot. A floppy disk device 20 stores and reproduces data on a floppy disk 19 inserted from 18. A floppy disk device 20 reads data from a memory in the IC card 1 inserted from a card insertion slot 21. ,
Alternatively, it is an IC card reading / writing section for writing data in the memory. The IC card reading / writing section 20 is connected to the main body of the card handling machine 10 by a cable 22. That is, as shown in FIG. 5, a transport path 31 for transporting the IC card 1 inserted from the card insertion slot 21 is provided. The transport path 31 is provided with a plurality of rotatable transport rollers 32 which are positioned so as to sandwich the IC card 1 from above and below when the IC card 1 is transported. Each transport roller 3 provided as a pair
2 are provided at equal intervals along the transport path 31. The distance from the center of each of the transport rollers 32 to the center of an adjacent transport roller 32 has a width in the transport direction of the card. Therefore, the transport path 31 of the IC card 1 is defined by the transport guide 33. An IC card is provided on the transport guide 33.
A read / write unit 34 for exchanging data with the CPU 3 in the node 1
Is arranged. The read / write unit 34 is connected to the connection unit 2
It is designed to be electrically connected to Next, in such a configuration, the IC car
Regarding the handling of the cable, refer to the flow chart shown in FIGS.
This will be described with reference to a chart. For example, now, the customer is an IC card handling machine 1
The IC card 1 is inserted into the card insertion slot 21 of the "0". Then, the IC card 1 is electrically connected to the read / write unit 34 by the connection unit 2. This allows
An operating voltage (Vcc) of 5 V is applied to the booster circuit 6 via the terminal 2a of the connection unit 2. Then, the booster circuit 6 generates a write voltage (Vpp) of 21V and a control voltage (Vcc ') of 5V. As a result, the control voltage (Vcc ') becomes equal to the above C
The signals are applied to the PU 3, the data memory 4, and the interface circuit 5. Then, the CPU 3 is connected to the CPU 3 via the interface circuit 5, the connection unit 2 and the read / write unit 34.
11 to output a connection signal. As a result, the CPU 11 provides guidance on the CRT display device 13 saying "Please input your password". In response to this guidance, the user enters the keyboard 12
To enter the password. With this input, a signal corresponding to the personal identification number and a signal indicating the handling machine are sent from the CPU 11 to the read / write unit 3.
4. It is supplied to the CPU 3 via the connection unit 2 and the interface circuit 5. Thus, the CPU 3 temporarily stores the supplied personal identification number in the internal memory (ST1). Next, the CPU 3 reads out a previously written password from the data memory 4 (ST2),
The password is compared with the password recorded in the internal memory (ST3).
If the comparison result indicates a match, the CPU 3 outputs a match signal to CP
Output to U11 (ST4). If the comparison results in a mismatch in the above step, the CPU 3 supplies a control signal to the booster circuit 6 and applies the 21 V write voltage (Vpp) generated from the booster circuit 6 to the data memory 4. (ST5). Thus, the CPU 3 counts up a non-coincidence counter (not shown) provided in the data memory 4 (ST6). When the count value reaches a predetermined value, the IC card 1 outputs an invalid mismatch signal to the CPU 11 (ST7). As a result, when the mismatch signal is supplied, CP
U11 judges that the re-input of the password or the transaction by the IC card handling machine 10 is not possible, and notifies the user to that effect. Further, write data is supplied from the CPU 11 to the CPU 3. Then, the CPU 3 temporarily stores the supplied write data in an internal memory (not shown) (ST10). Next, the CPU 3 supplies a control signal to the booster circuit 6, and applies the 21V write voltage (Vpp) generated from the booster circuit 6 to the data memory 4 (ST1).
1). Thus, CPU 3 reads out the write data stored in the internal memory and writes it into data memory 4 (ST12). Then, it is checked whether the data written in the data memory 4 is correct or not by reading the data (S
T13) If correct, output a normal signal to the CPU 11 (ST14); if abnormal, output an abnormal signal to the CPU 11 (ST15). As described above, when a voltage for normal operation of each circuit in the IC card is applied and the control system is operating normally, the data memory is securely stored only when data is written. Since the write voltage is applied to the data memory and the control voltage for reproduction is applied to the data memory except during data writing, erroneous writing can be prevented. Therefore, erroneous writing of data into the data memory cannot be performed except at the time of writing. Before the password match result is output,
The data for the mismatch is stored in the data memory,
If the write voltage is defective, no match result is output. Therefore, in the case of a write voltage failure as in the prior art, it is not impossible to leave a trace on the data memory as evidence that the password is incorrect when the password is incorrectly input. . Thus, if the initialization is performed by once removing the IC card from the reading / writing section, there is no clue that the password does not match, and the procedure of the initialization and the password input is repeated finite times to obtain the password. The conventional drawback of matching can be avoided. For this reason, the personal identification number cannot be detected, and high security can be obtained. Also, When the applied voltage is defective, the card is erroneously recognized as a card defect, and this erroneous diagnosis can prevent the system from giving a great obstacle to recovery. Further, the application of the write voltage (Vpp) to the data memory 4 by the booster circuit 6 is performed in accordance with a control signal supplied from the CPU 3 when writing data. , Write voltage (Vp
The application of p) is performed only when necessary, and power consumption can be reduced. In the above-described embodiment, the IC card is used. However, the present invention is not limited to this. Any IC card may be used as long as it has a data memory and a control element and selectively inputs and outputs externally.
The shape is not limited to the card shape, but may be another shape such as a bar shape. As described in detail above, according to the present invention,
By incorporating the boosting means in the portable medium and controlling the operation by the portable medium itself, the voltage applied to the non-volatile data memory is compensated, and the improper trace or the write data is lost. To solve the problem of defective writing, and provide a portable medium with high security and reliability.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram schematically showing the configuration of an electric circuit of an IC card. FIG. 2 is an external perspective view of an IC card. FIG. 3 is an external view of a card handling machine. FIG. 4 is a schematic block diagram of a card handling machine. FIG. 5 is a cross-sectional view showing a configuration of an IC card read / write unit. FIG. 6 is a flowchart for explaining the operation of an IC card. [FIG. 7] Flowchart for explaining the operation of the IC card [Description of symbols] 1 IC card 2 Connect unit 3 CPU 4 Data memory 5 Interface circuit 6 Step-up circuit

Claims (1)

(57) [Claims] 1.Portable to store data by exchanging information with the outside
In the active medium, Provided on the surface of the portable medium and electrically connected to external devices
Drive voltage for driving the portable medium
Data between terminals applied from external devices and external devices
A connection unit having terminals for input / output An interface for exchanging information with the outside via this connection unit
-Face circuit, A non-volatile data memory for storing data, The operating voltage applied from outside via the above-mentioned connect part
Step up to generate a write voltage higher than the operating voltage and
A booster circuit applied to the nonvolatile data memory; Operates with the operating voltage applied from outside,
The data received via the interface circuit is temporarily recorded.
Has an internal memory to remember
Write the temporarily stored write data to the nonvolatile data
Operating the boosting means when writing to the
The write voltage generated by the nonvolatile data memory
To perform a write operation,
Whether the write data has been successfully written to the data memory
And outputs the result of determination to an external device.CP
UThe interface circuit and the nonvolatile data.
Data memory, booster circuit,CPUAre provided on one substrate
IsingA portable medium characterized by the above-mentioned. 2.Portable to store data by exchanging information with the outside
In a portable medium substrate used for a functional medium, An interface circuit for exchanging information with the outside; A non-volatile data memory for storing data, The operating voltage applied from the outside is boosted to be higher than the operating voltage.
Generates a high write voltage to the nonvolatile data memory
A booster circuit to be applied; Operates with the operating voltage applied from outside,
The data received via the interface circuit is temporarily recorded.
Has an internal memory to remember
Write the temporarily stored write data to the nonvolatile data
Activate the booster during the write operation to write
The write voltage generated by the boosting means is stored in the nonvolatile data.
Data to the data memory and perform a write operation.
Write data to the nonvolatile data memory
Is determined, and the result of this determination is output to an external device.
EmpowerCPUAnd the interface circuit,
Nonvolatile data memory, booster circuit,CPUIs one group
For portable media characterized by being provided on a plate
substrate.