JPS63219090A - Ic card device - Google Patents

Abstract

PURPOSE:To effectively attain the dealing to the stop of a power supplying without needing a cost by providing a storing memory means to store and store the memory contents of a data memory means, a memory control means and a discriminating means. CONSTITUTION:When address information and writing data are given from a terminal equipment to an IC card 1, the card 1 stores and stores the data stored in the area of a data area 85 shown by the address information to a data storing area 84. When the supplying of power is stopped and the supplying of the power is executed again while the data of the area of the area 85 are written, the data to be stored at the area 84 are returned to the data area shown by the address information stored in an address storing area 83. Consequently, since it is assured that the condition of a non-volatile memory 8 of the card 1 when the supplying of the power is stopped while the data are written is returned to the condition before the writing, the coping can be executed to the stop of the supplying of the power effectively and without needing the cost.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an IC card device, and in particular, when the supply of external R1 is temporarily stopped and restarted during data writing to the memory, the content of the memory is The present invention relates to an IC card device having a function of restoring an IC card to a state before storing data.

[Prior Art] Recently, an IC card processing system has been known in which an IC card is attached to a terminal device to perform various processing. In conventional IC card processing systems, when storing data in an area of the IC card's memory, a terminal device transfers address information indicating the area where data is to be written to the IC card and data to the IC card. The IC card writes data in the area of the memory indicated by the address information, and sends information to the terminal device indicating that the writing has been completed successfully.

By the way, while I was loading the data into the IC card, I
The terminal device may stop operating due to power outage. In such a case, the terminal equipment side does not know how much of the sent data has been written to the IC card memory, so the IC card memory is checked when the power supply is resumed. .

[Problems to be Solved by the Invention] However, as described above, if the power supply is stopped during data writing, the data written to the memory immediately before the power supply stops lacks reliability, so the memory There is a problem in that even if the data is checked, the validity of the data cannot be determined. Such a problem becomes particularly serious when an IC card is used for personal fund management like a cash card.

Furthermore, in order to avoid this problem, it may be possible to mount a battery in the terminal device, but there is a problem in that the cost increases.

Therefore, the main object of the present invention is to provide an IC card device that can effectively and inexpensively deal with power supply outages.

[Means for Solving the Problems] The IC card device of the present invention includes a data storage means for storing data, an evacuation storage means for evacuation and storage of the stored contents of the data storage means, and an external evacuation storage control means for evacuating and storing the memory contents of the data storage means in the evacuation storage means in response to data given from the outside; and data writing means for writing data given from the outside into the data storage means. Then, after the power supply from the outside is temporarily cut off while the data writing means is writing data to the data storage means, the data writing to the data storage means is stopped in response to the power supply being restored. a determining means for determining whether the writing of data to the data storage means has been completed; and data restoration control means for controlling data restoration to the data restoration means.

[Operation] According to the present invention, the storage contents of the data storage means are saved and stored in the save storage means in response to data given from the outside, and when data is written from the outside while data is written to the data storage means. After the power supply is temporarily cut off, in response to the power supply being restored, it is determined whether or not writing of data to the data storage means is completed, and writing of data to the data storage means is completed. If the process has not been completed, the storage contents of the save storage means are restored to the data storage means.

[Embodiment] FIG. 2 is an external view of an IC card according to an embodiment of the present invention, and FIG. 3 is a schematic block diagram showing the electrical configuration of an embodiment of the present invention. A magnetic stripe 2 and contacts 3 are provided on the surface of the IC card 1. An MPLJ 4 is provided inside the IC card 1. The MPU 4 has an interface 5, a timer 6, a ROM 7, and a non-volatile memory 8.
are connected. The interface 5 mediates the supply of power from the terminal device to the IC card 1 and data transmission between the MPU 4 and the terminal device when the IC card 1 is inserted into the terminal device. Timer 6 generates a specific time interval signal.

The ROM 7 stores an operating program for the MPU 4 based on flowcharts shown in FIGS. 1A and 1B, which will be explained later. The non-volatile memory 8 is a memory that retains its stored contents even when power is not supplied.
Contains a storage area as shown in the figure.

FIG. 4 is an illustrative diagram showing a storage area of the nonvolatile memory shown in FIG. 3. In FIG. 4, the non-volatile memory 8 has a password code area 81. Data recovery flag (FF) area 82. Address save area 83. Data evacuation area 8
4 and data area 85. The pin code area 81 stores a pin code for verifying that the user of the IC card 1 is the person in question. The data recovery flag area 82 contains a data recovery flag (FF).
' is memorized. The value of FF is 1 when writing is interrupted and O when writing is completed. The address save area 83 stores address information given from the terminal device. This address information is information indicating one of the areas in the data area 85. In the data save area 84, data stored in the area of the data area 85 indicated by the above-mentioned address information is saved and stored. Data area 85 is an area for storing data.

In this embodiment, the above address information and write data are given to the IC card 1 from the terminal device.

The IC card 1 saves and stores the data stored in the data area 85 indicated by the given address information in the data save area 84. And data area 8
The data given to the area 5 is written to the corresponding area, but if the power supply is interrupted during writing and the power is supplied again, the data saved in the data save area 84 is written to the address. The data area is returned to the data area indicated by the address information stored in the save area 83. Therefore, even if the power supply is interrupted during data writing, it is guaranteed that the state of the non-volatile memory 8 of the IC card 1 will be restored to the state before writing, so what action should be taken by the terminal '3A? method can be determined. One way to deal with this is, for example, to send the write data to the IC card 1 again.

FIG. 5 is a diagram showing the format of data and commands exchanged between an IC card and a terminal device,
In particular, FIG. 5(a) shows a data write command given to the IC card from the terminal device, FIG. 5(b) shows write data given to the IC card from the terminal device, and FIG. ) indicates the status given to the terminal device from the IC card. In FIG. 5(a), a data write command 10 includes a write command code, a write address indicating a write area, and a CRC (cyclic reader).

check). In FIG. 5(b), write data 20 consists of write data and CRC.

In FIG. 5(0), the status 30 consists of a status code, information indicating OK or NG, and a CRC.

FIG. 1Δ and FIG. 1B are flowcharts for explaining the operation of an embodiment of the present invention. Next, the operation of one embodiment of the present invention will be described in detail with reference to FIGS. 18 to 5.

When the IC card 1 is inserted into the terminal device, the terminal device
Power is supplied to the C card 1. IC card 1 is area 8
Check the data recovery flag FF of 2, and the value of FF is 1.
If so, in order to restore the stored contents of the data area 85 to the state before the data writing that was performed before, the corresponding area of the data area 85 indicated by the address information stored in the address save area 83 is written. The data saved and stored in the data save area 84 is loaded into VB, and then the data recovery flag FF is cleared. This is because if FF is 1, data writing performed before this power supply is undefined. On the other hand, if the value of FF is O when power is supplied, the above-mentioned step is skipped and the password code verification process is performed. After performing this DarJ code matching process, the IC card 1 waits for command input. When the data write command 10 is given from the terminal device, the IC card 1 reads the C of the command 10.
Perform RC check. If there is an abnormality in the CRC check, the IC card 1 transmits an error status to the terminal device and becomes capable of inputting commands again. On the other hand, if there is no abnormality in the CRC check, the IC card 1 analyzes the received command, and if it is not a data write command, performs other processing IfP, but if it is a data write command, the IC card 1 analyzes the received command. The address is stored in the address save area 83, and the data stored in the corresponding area of the data area 85 indicated by the corresponding address is stored in the data save area 84. Subsequently, the value of the data recovery flag FF is set to 1. Subsequently, the IC card 1 transmits an OK status to the terminal device and waits to receive the vibration data. Terminal 5A
When @ receives the OK status, it transmits the write data to the IC card 1, and the status becomes ``receiving''. The IC card 1 reads the CR of write data 20 given from the terminal device.
A check is performed, and if there is an abnormality, an error status is sent to the terminal device and the command is input again. On the other hand, if there is no abnormality in the CRC check, the write data given from the terminal device is sent to data write command 1.
Write to the corresponding area of the data area 85 indicated by the write address included in 0. When the IC card 1 completes writing data to the corresponding area, it transmits an OK status to the terminal device.

In the status reception waiting state, the terminal device masks power-off as soon as it starts receiving the status from the IC card 1.

Here, masking the power cut means that when a voltage drop occurs due to a power outage, etc., an interrupt message indicating that the voltage drop has occurred for a certain period of time is sent to the CPU built in the terminal device. The aim is to avoid giving In this way, the reason why interrupt information indicating that a voltage drop has occurred on the terminal device side is not provided to the CPLI of the terminal device for a certain period of time is that even if a voltage drop occurs, the IC card This is to deal with this by delaying the suspension of the CPU when a status indicating that writing has been completed is sent from the CPU. [After the C card sends the OK status, it clears the data recovery flag FF and becomes capable of command input again. When the terminal device completes receiving the status, it releases the power-off mask. If the status is normal, the next process is performed, but if the status is abnormal, error processing is performed.

[Effects of the Invention] As described above, according to the present invention, the storage contents of the data storage means are saved and stored in the save storage means in response to data being given from the outside, and the contents of the data storage means are saved and stored in the save storage means. After the external power supply is temporarily lost during data writing,
In response to restoration of power supply, it is determined whether or not writing of data to the data storage means has been completed, and it has been determined that writing of data to the data storage means has not been completed. Since the contents stored in the ¥1 saving storage device are restored to the data storage device in accordance with the above, it is possible to clarify the operation that the terminal device should perform when the power supply is stopped and restarted.

[Brief explanation of the drawing]

FIGS. 1A and 1B are flowcharts for explaining the operation of an embodiment of the present invention. FIG. 2 is an external view of an IC card according to an embodiment of the present invention. FIG. 3 is a schematic block diagram showing the electrical configuration of an embodiment of the present invention. FIG. 4 is an illustrative diagram showing a storage area of the nonvolatile memory shown in FIG. 3. FIG. 5 is a diagram for explaining messages exchanged between an IC card and a terminal device according to an embodiment of the present invention. In the figure, 1 is an IC card, 3 is a contact, and 4 is an MPU1
5 is an interface, 6 is a timer, 7 is a ROM 18 which is a non-volatile memory, 82 is a data recovery flag area, 83
is an address save area, 84 is a data save area, and 85 is an address save area.
indicates a data area. 1st AII (廿valueSAKIGIi) I. , -de, (end floor V1+ Figure 1B Figure 2vA Figure 3 Country 4 Figure 5

Claims (1)

[Scope of Claims] Data storage means for storing data; evacuation storage means for saving and storing the stored contents of the data storage means; an evacuation storage control means for saving and storing the memory contents of the means in the evacuation storage means; a data writing means for writing externally applied data into the data storage means; and a data writing means for the data storage means. determining means for determining whether or not writing of data to the data storage means has been completed in response to the power supply being restored after the power supply from the outside is temporarily cut off during writing of the data; , and in response to the determination by the determination means that the interruption of data to the data storage means has not been completed,
I comprising a data restoration control means for controlling the storage contents of the save storage means to be restored to the data storage means.
C card device.