JPH03185587A - Portable medium - Google Patents

Abstract

PURPOSE:To prevent card access from being interrupted by storing date information in plural positions of a data memory, and if the date information can not be read out from one position at the time of reading out the date information from the data memory, reading out it from the other position. CONSTITUTION:In the case of executing a transaction in a shopping mode in Japan e.g., a CPU 28 reads out Japanese date information from the storage area 31a1 of a date information storage area 31a in the data memory 31. If the date information can not be read out from the storage area 31a1, the CPU 28 reads out the date information from the storage area 31b1 of a date information storage area 31b in the data memory 31. When the date information can be read out from the area 31b1, the CPU 28 stores the date information in the storage area 31a1 to update the area 31a1. When the transaction is executed by using the date information and the data information can not be read out from both the areas, error processing is executed, so that card access can be prevented from being interrupted.

Description

[Detailed Description of the Invention] [Objective of the Invention] (Industrial Application Field) This invention has a built-in CPU, data memory, internal battery, etc., and can be used as a stand-alone card in calculators, time displays, etc., or as a terminal device. This invention relates to portable media such as multifunctional IC cards that can be used by inserting them into a computer.

(Prior technology) Conventionally, cards have a built-in CPU (control element), data memory, etc., and have a keyboard, display, etc., and are used as a stand-alone card in calculators, time displays, etc., or when inserted into terminals. Multifunctional IC cards have been developed. Above C
The PU, data memory, etc. are built into LSI.

Such an IC card has a disadvantage that if the date information is destroyed, the date information cannot be obtained and access to the card will be hindered.

(Problem to be solved by the invention) As mentioned above, if the date information stored in the data memory is destroyed and cannot be read out, the date information cannot be obtained and the card cannot be accessed. Even if the date information stored in the data memory is destroyed and cannot be read, the date information stored in another area of the data memory will be removed. It is an object of the present invention to provide a portable medium that can be used without causing any hindrance to card access.

[Structure of the Invention] (Means for Solving the Problems) A portable medium of the present invention includes a control element and a data memory, in which date information is stored in a plurality of locations in the data memory, and the data When reading the date information from the memory, if the date information cannot be read from one location, a reading means is provided for reading it from the other location.

(Function) In a device having a control element and a data memory, the present invention is capable of reading out date information from the other location if the date information cannot be read from one location when reading the date information from the data memory. This is what I did.

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

In FIG. 2, 10 is an IC card as a portable medium, which is a multifunctional card that performs various functions. For example, it has an online function used in conjunction with a terminal (not shown), an offline function in which the IC card 10 operates independently, and a waiting state in which only the clock is counted.

The offline functions mentioned above include a calculator mode that can be used as a calculator, a time mode that displays the time according to the clock used by the user, and an electronic notebook that allows you to register and read out addresses, names, phone numbers, etc. mode,
Alternatively, the IC card 10 can be used alone, such as in a shopping mode in which the IC card 10 is used as a plurality of credit cards.

In the above shopping mode, the used balance, expiration date, shopping record, etc. are stored in the IC card 10, and each time the IC card 10 makes a purchase, the amount spent is deducted from the balance in the IC card 10, and the shopping information is recorded. It is. The above IC card 10
If the balance in the card or the expiration date has expired, it can be updated by having the contracted bank issue a secret code.

On the surface of the IC card 10, there is a contact section 11 arranged at a position that matches the card specifications.A keyboard section 12 consisting of 20 keys, and a display formed of a liquid crystal display element arranged on the top surface of this keyboard section 12. A section 13 is provided.

The contact portion 11 includes, for example, a plurality of terminals 11a to 11a.
llf, and the operating chisel source voltage (V
cc, +5V), EEPROM write power supply voltage (Vp
It consists of terminals for p), ground, clock signal, reset signal, and data input/output.

The keyboard section 12 includes selection keys (TI, T2, T3, T4) 12a for selecting processing corresponding to card types, ie, various credit cards, cash cards, etc.;
Numeric keypad 12b, four arithmetic operation keys as function keys, that is, addition (+) key 12C1 subtraction (-) key 12
d1 Division (÷) key 12e1 Multiplication (×) key 12f1 Decimal point (,) key 12g1 and Equal (-m) key 1
It is composed of 2h.

The addition key 12c is used as a NEXT key, that is, a mode selection key for selecting a mode during offline date and time display, and the subtraction key 12d is used as a BACK key.
The multiplication key 12f is used as a start key, the decimal point key 12g is used as a NO key and an end key, and the equal key 12h is used as a YES key. , is now used as a power-on key.

For example, equal key 12h as a power-on key
When is pressed, the CPU, which will be described later, is released from the HALT state and displays the time and date of the message for starting the operation on the display section 13.

In this state, when the numeric keypad 12b is pressed, the IC card 10 enters the calculator mode, and four arithmetic operations can be performed.

Further, the addition key 12c as a mode selection key is used as a key to advance the display state of the display section 13 which is currently displaying the date and time to another mode, and displays menus on the display section 13 such as electronic book, time set, date, etc. Each time the key is pressed, the transaction mode such as set, purchase, etc. is displayed. When executing these modes, press the equal key 12h above.
By pressing the YES key, the mode is entered and execution becomes possible.

The display section 13 is a 16-digit dot matrix with each digit being 5×7.

FIG. 3 shows an IC card reading/writing unit 1 used in a terminal device such as a personal computer that handles an IC card 10.
This shows the appearance of No. 6. In other words, card insertion slot 1
By connecting with the contact part 11 of the IC card 10 inserted from 7, data in the memory of the IC card 10 can be read or data can be written into the memory.

The IC card reading/writing section 16 is connected to the main body of a personal computer (not shown) by a cable.

Further, the electric circuit of the IC card 10 is constructed as shown in FIG. That is, the contact portion 1
1. Communication control circuit 21, reset control circuit 22, power supply control circuit 23, for example, a 3-volt internal battery (built-in power supply) 25, and a battery check circuit that checks whether the voltage value of this internal battery 25 is above a specified value. 24,
The clock control circuit 26 is a crystal oscillator for arithmetic clock oscillation, and has an oscillation frequency of 200 KH2 (high-speed clock).
an oscillator 27 that outputs a signal, a control CPU (central processing unit) 2g, a mask ROM 29 in which the basic program of the IC card 10 and necessary data are recorded, and a working memory 30.
, a password, date information as a calendar, data, etc. are recorded, as well as programs for each user and the above-mentioned basic program, and controls the data memory 31, mask ROM 29, and data memory 31 composed of EEPROM. Memory control circuit 40. A timer 32 used for timing during processing operations, a clock circuit 33, an oscillator 34 which is a crystal oscillator for basic clock oscillation and always outputs a signal with an oscillation frequency of 32.768 KH2 (low-speed clock), and a display section. A control circuit 35, a display driver 36 for driving the display 13, and a keyboard interface 38 as a key input circuit for the keyboard 12.
It is made up of.

The communication control circuit 21, CPU 28, ROM 29, memory control circuit 40, program working memory 30,
Data memory 31, timer 32, clock circuit 33, display control circuit 35, and keyboard interface 38
are connected by a data bus 20.

The communication control circuit 21 converts a serial human output signal, which is supplied via the contact unit 11 from the IC card reading/writing unit 16 connected to the terminal (not shown) at the time of reception, into parallel data. At the time of transmission, that is, parallel data supplied from the data bus 20 is converted into a serial human output signal and output to the terminal 16 via the contact section 11. . In this case, the format of the conversion is
It is defined for the terminal device and the IC card 10.

When the reset control circuit 22 goes online, it generates a reset signal and starts the CPU 28.

When the power supply control circuit 23 goes online, it switches from being driven by the internal battery 25 to being driven by an external power supply after a predetermined period of time has elapsed, and when it goes offline, that is, when the external voltage drops, it switches from being driven by the external power source to being driven by the external power source. This is to switch to driving by the battery 25.

The clock control circuit 26 switches between a low-speed clock and a high-speed clock in a timely manner in an offline mode in which the card operates with the internal battery 25, and also switches between a low-speed clock and a high-speed clock in a timely manner in order to power down after executing a HALT command.
The oscillation circuit (not shown) that outputs the signal of the oscillation frequency (high-speed clock) of KH2 is stopped, and the supply of the clock to the CPO 28 is also stopped, so that it stands by in a completely stopped state. The clock control circuit 26 resets,
The configuration is such that when the HALT command is executed, the clock mode is basically selected.

The basic programs stored in the mask ROM 29 include a credit function, a drive program for I10 control,
These include a calendar function and various other subroutine functions.

As shown in FIG. 4, the data memory 31 is provided with date information storage areas 31a and 31b at a plurality of locations, for example, two locations, in which date information as a calendar is stored. These date information storage areas 31a, 31
The stored contents of b are updated in response to a date switching signal from the clock circuit 33 every 24 hours. Each date information storage area 31a, 31b has a storage area 3 in which date information of Japan, the United States, the United Kingdom, etc. is stored, respectively.
1a1 31a2.31a3.31b131b2.31
It is stored in b3.

The clock circuit 33 has a display clock that can be freely set and changed by the card holder, and a transaction clock that sets, for example, world standard time at the time of card issuance and cannot be changed thereafter. ing.

The display unit control circuit 35 converts the display data supplied from the CPU 28 into a character pattern using a character generator (not shown) configured with an internal ROM, and converts the display data supplied from the CPU 28 into a character pattern on the display unit 13 using a display unit driver 36. It is to be displayed.

The keyboard interface 38 converts keys input on the keyboard section 12 into human input signals corresponding to keys, and outputs the signals to the CPU 28.

Next, the operation in such a configuration will be explained with reference to the flowchart shown in FIG. For example, when conducting a transaction in shopping mode in Japan, the CPU 28
reads the date information of Japan from the storage area 31al of the date information storage area 31a in the data memory 31. If the date information cannot be read from the storage area 31a1, the CPU 28 reads the date information from the storage area 31b1 of the date information storage area 31b in the data memory 31. Here, if the date information can be read, C
The PU 28 updates and stores the date information in the storage area 31a1 of the date information storage area 31a in the data memory 31.

Storage area 31a1 of the above date information storage area 31a
Or storage area 31 of date information storage area 31b
If the year, month, and day information can be read from b1, a transaction is performed using that year, month, and day information, and if the year, month, and day information cannot be read from either area, an error process occurs.

As mentioned above, by storing date information in multiple locations in the data memory, even if the date information in the first area is destroyed and cannot be read, it will be stored in another area. It is possible to read out and obtain the date information of the card, so that there is no problem in accessing the card.

Although an IC card is used in the above embodiment, the IC card is not limited to this, as long as it has a data memory and a control element, and selectively performs human output from the outside, and the shape is not card-like. , or other shapes such as a rod shape.

[Effects of the Invention] As detailed above, according to the present invention, even if the date information stored in the data memory is destroyed and cannot be read out, it can be stored in another area of the data memory. It is possible to provide a portable medium that can use the date information of the current date and that does not cause any trouble in accessing the card.

[Brief explanation of drawings]

The drawings are for explaining one embodiment of the present invention, and FIG. 1 is a diagram showing a schematic configuration of an electric circuit of an IC card, and FIG.
Figure 3 is a plan view showing the configuration of the IC card, Figure 3 is a diagram showing the terminal that handles the IC card, Figure 4 is a diagram showing the configuration of the data memory, and Figure 5 explains the operation of reading date information. This is a flowchart for DESCRIPTION OF SYMBOLS 10... IC card (portable medium), 11... Contact section, 12... Cow board section, 13... Display section, 16... Terminal, 28... CPU (control element) ), 2...mask ROM (storage means), 31...
- Data memory, 31a, 31b... Date information storage area, 1 b2 b3... Storage area.

Claims (1)

[Claims] A portable medium having a control element and a data memory, wherein date information is stored in a plurality of locations in the data memory,
A portable medium characterized in that, when reading date information from the data memory, reading means is provided for reading from the other location if the date information cannot be read from one location.