KR101258837B1 - Ic chip and method for writing data therein - Google Patents

Abstract

PURPOSE: An IC(Integrated Circuit) chip capable of performing repetitive writing as many as the predetermined number and a data recording method thereof are provided to repetitively perform a writing operation as many as the predetermined number in case data is not normally recorded due to a temporary environmental factor or difference of writing delay time according to IC chips. CONSTITUTION: A reading operation is performed to read an existing value from a data storage position where data(USR_DATA) used for operating an IC chip is stored(S710). A writing operation is performed to record the existing value in the IC chip(S720). A writing operation is performed to record a new value requested for recording in the data storage position(S730). Read data in the data storage position and the new value requested for recording are compared(S740). In case the read value and the new value requested for recording are different, a writing operation is performed to record the new value requested for recording in the data storage position as many as the predetermined number at a predetermined interval of time(S750). The read value in the data storage position is compared with the new value requested for recording(S760). In case the read value and the new value requested for recording are different, a writing operation is performed to record the existing value in the data storage position(S770). The read value in the data storage position is compared with the existing value(S780). In case the read value and the existing value are different, a shut down message or a failure message is provided to an external device(S790). [Reference numerals] (AA) Start; (BB) End; (S710) Perform a reading operation to read an existing value from a data storage position where data used in operating an IC chip is stored; (S720) Perform a writing operation to record the existing value; (S730) Perform the writing operation to record a new value in the data storage position; (S740,S760) Compare a read value in the data storage position and the new value; (S750) Perform the writing operation to record new value in the data storage position as much as the predetermined number at a predetermined interval when the values are different; (S770) Perform the writing operation to record the existing value in the data storage position when the values are different; (S780) Compare the read value in the data storage position and the existing value; (S790) Provide a shut down message or a failure message to an external device when the values are different

Description

IC chip and method for writing data therein {IC chip and method for writing data therein}

The present invention relates to an IC chip and a data writing method thereof, and more particularly, to an IC chip and a data writing method thereof which perform a write operation again a predetermined number of times when a data write operation fails.

An integrated circuit chip is a device capable of storing and processing various digital information. Such IC chips are used in various fields such as smart cards, transportation cards, credit cards, debit cards, security tokens, toner chips, and the like. Such an IC chip exchanges data with an external device in a contact / contactless manner. When the IC chip records data provided from an external device, data recording may not be normally performed due to factors such as a defective IC chip. Malfunction may occur if data of high importance is not normally recorded, and therefore, the IC chip is shut down when data writing is not normally performed.

However, the phenomenon in which the IC chip writes data provided from an external device is not normally performed due to environmental factors such as noise and vibration generated during the writing operation of the IC chip, or the write delay time of each IC chip. It can also be caused by internal factors such as differences. Therefore, it is necessary to develop a method for improving the reliability of the data write operation of the IC chip.

KR 10-1995-0031385 (Hyundai Electronics Industry Co., Ltd.) December 18, 1995 Patent Document 1 is a data recording method of flash Y. pyrom, and Patent Document 1 performs writing after instructing a multi-byte write command in all steps of the data recording process. Disclosed is the repetition of the steps and the step of determining the data recording situation. KR 10-1997-0076357 (Samsung Electronics Co., Ltd.) Dec. 12, 1997 Patent Document 2 is a method of storing information for an IC card chip and an IC card chip, and Patent Document 2 discloses that an address is in a subroutine area of a ROM. Only to allow data storage in EEPROM is disclosed.

An object of the present invention is to provide an IC chip and a data writing method thereof which perform a write operation again a predetermined number of times when a data write operation fails.

SUMMARY OF THE INVENTION The present invention has been made in an effort to provide a computer-readable recording medium having recorded thereon a program for causing a computer to execute a data recording method for performing a write operation again a predetermined number of times when a data write operation fails.

An IC chip according to the present invention for achieving the above technical problem, the storage unit for storing information used when the operation of the IC chip; A comparator for comparing the first value with a second value read at the location where the information is stored after a first write operation of writing the first value at the location where the information is stored; And a controller configured to perform a second write operation of writing the first value in a position where the information is stored a predetermined number of times at intervals of a predetermined time when the second value and the first value are different from each other. The storage unit stores a third value read from a location where the information is stored before the first write operation is performed, and the comparator stores a fourth value read from a location where the information is stored after the second write operation is completed. Comparing the first value, and when the fourth value and the first value is different from each other, the control unit performs a third write operation to write the third value in a location where the information is stored.

An IC chip according to the present invention for achieving the above technical problem, the first read operation at the position where the information is stored before the first write operation to write the first value in the position where the information used in the operation of the IC chip is stored is performed. A storage unit for storing two values; A comparator comparing the first value with a third value read from a location where the information is stored after the first write operation is completed; And a controller configured to perform a second write operation of writing the second value to a location where the information is stored when the third value and the first value are different from each other.

According to another aspect of the present invention, there is provided a data recording method comprising: reading a data at a location where the information is stored after a first write operation for writing a first value at a location where information used in the operation of the IC chip is stored; Comparing a second value with said first value; And when the second value and the first value are different from each other, performing a second write operation of writing the first value to a location where the information is stored a predetermined number of times at intervals of a predetermined time. Storing a third value read in a location where the information is stored before the first write operation is performed; Comparing the first value with a fourth value read at a location where the information is stored after the second write operation is completed; And when the fourth value and the first value are different from each other, performing a third write operation of writing the third value to a location where the information is stored.

A computer readable medium according to the present invention for achieving the above technical problem records a program for causing the computer to execute the above method.

According to the IC chip and the data writing method thereof according to the present invention, if the data is not normally written due to a temporary environmental factor or a difference in the write delay time for each IC chip, the IC chip is again executed a predetermined number of times. The reliability of the write operation can be improved. This increases IC chip reusability, thereby reducing unnecessary waste of resources.

1 is a view for explaining the configuration of an IC chip according to an embodiment of the present invention;
2 is a view for explaining a structure of a storage unit of an IC chip according to an embodiment of the present invention;
3 to 7 are views for explaining the operation of the IC chip according to an embodiment of the present invention,
8 is a flowchart for explaining a method of writing data into an IC chip according to an embodiment of the present invention;
FIG. 9 is a flowchart for explaining in detail the step of repeating the write operation illustrated in FIG. 8 a plurality of times.

Hereinafter, exemplary embodiments of an IC chip and a data recording method thereof according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a view for explaining the configuration of the IC chip according to an embodiment of the present invention, Figure 2 is a view for explaining the structure of the storage unit of the IC chip according to an embodiment of the present invention, Figures 3 to 7 A diagram for describing the operation of the IC chip according to the embodiment of the present invention.

According to an embodiment of the present invention, the IC chip 100 may include a smart card, a traffic card, a credit card, a debit card, a hardware security module, a toner chip, and a personal ID. It is mounted on a card or the like to exchange data with an external device (not shown) by a contact / non-contact method. For example, a toner chip refers to a customer replacement unit monitor (CRUM) of replacement parts such as toners mounted on a printer, and stores information such as toner usage, number of prints, number of print dots, and the like. To this end, the IC chip 100 includes a storage 110, a comparator 130, and a controller 150.

The storage unit 110 stores programs and various data necessary for the operation of the IC chip 100. Referring to FIG. 2, the storage 110 includes a first storage 211, a second storage 213, and a third storage 215.

The first storage unit 211 stores software data such as an operating system OS_DATA mounted on the IC chip 100, an application IAPP_DATA mounted on the manufacture / issuance of the IC chip 100, and the like. The first storage unit 211 is a storage medium that retains stored data and cannot store new data or delete stored data regardless of whether power is applied. The storage means that may be adopted as the first storage unit 211 may include a read only memory (ROM).

The second storage unit 213 stores various data such as environment setting information CS_DATA recorded at the time of manufacture / issuance of the IC chip 100 or after issuance, and information USR_DATA used when the IC chip 100 is operated. do. Here, the configuration information CS_DATA is a configuration setting value used in a data write operation to the IC chip 100. The environment setting information CS_DATA includes the number of repetitive write operations when data recording is not normally performed, and the processing method (such as stopping use or writing operation failure) that is finally selected when data writing is not normally performed. Say The information USR_DATA used in the operation of the IC chip 100 is data necessary for using the electronic card according to the purpose of the electronic card on which the IC chip 100 is mounted. The information USR_DATA used in the operation of the IC chip 100 refers to a certificate, a charged amount, a remaining amount, a page counter, a dot counter, a social security number, and the like.

The second storage unit 213 is a storage medium capable of retaining stored data and storing new data or deleting stored data regardless of whether power is applied. Storage means that may be adopted as the second storage unit 213 may be an EEPROM (electrically erasable programmable ROM), flash memory (flash memory) and the like.

The third storage unit 215 stores data provided or temporarily generated from an external device during the operation of the IC chip 100. The third storage unit 215 is a storage medium capable of maintaining stored data only when power is applied and storing new data or deleting stored data. Storage means that may be adopted as the third storage unit 215 may be a random access memory (RAM) or the like.

The controller 150 stores a new value at a location where data such as environment setting information CS_DATA recorded at the time of manufacture / issuance or issuance of the IC chip 100 or information USR_DATA used at the operation of the IC chip 100 is stored. Perform a write operation to write In this case, the controller 150 may temporarily store a value provided from an external device in the third storage unit 215 and perform a write operation of writing the temporarily stored value to a location where data is stored. In addition, the controller 150 may acquire a new value according to a command provided from an external device and perform a write operation of writing the obtained value in a location where data is stored. For example, when a command to add '1' to a value of data is received from an external device, the controller 150 temporarily stores a value read from a location where data is stored in the third storage unit 215, and stores a ' A write operation may be performed to add 1 'and write a value added with' 1 'to a location where data is stored.

Referring to FIG. 3, the controller 150 performs a read operation (RO_1) before a write operation (WOO_1) for writing a new value (NV) at a location where the information USR_DATA used in the operation of the IC chip 100 is stored. The write operation WO_1 is performed to write the existing value OV read from the location where the information USR_DATA is stored in the second storage unit 213 through the.

The controller 150 checks whether the write operation is completed through a write hardware register. That is, the controller 150 checks whether data can be written through the write hardware register.

Referring to FIG. 4, after the write operation WO_2 for writing the new value NV at the position where the information USR_DATA is stored is completed, the controller 150 may store the information USR_DATA at the position where the information USR_DATA is stored. If the read value (RV_1) and the new requested value (NV) are different from each other, a write is performed to write the new requested value (NV) to the location where the information (USR_DATA) is stored a predetermined number of times at predetermined time intervals. Perform operation WO_3. For example, the controller 150 may perform a write operation WO_3 at intervals of '1 ms'.

Referring to FIG. 5, the controller 150 performs information after every write operation is completed while performing a write operation WO_3 for writing a new value NV requested to be recorded in a location where the information USR_DATA is stored a predetermined number of times. The write operation WO_3 may be terminated when the value MRV read from the location where the USR_DATA is stored and the new value NV requested to be written match.

In this case, the controller 150 writes a new value NV written in the location where the information USR_DATA is stored a predetermined number of times based on the environment setting information CS_DATA stored in the second storage unit 213 ( WO_3) can be carried out.

Referring to FIG. 6, the controller 150 performs a read operation RO_3 after a write operation WO_3 for writing a new value NV requested to be recorded in a location where the information USR_DATA is stored a predetermined number of times. If the value read from the location where the information USR_DATA is stored is different from the new value NV requested to write, the existing value OV read through the read operation RO_4 is written to the location where the information USR_DATA is stored. Performs a write operation (WO_4).

Referring to FIG. 7, the controller 150 stores the information USR_DATA through the read operation RO_5 after the write operation WO_4 for writing the existing value OV at the location where the information USR_DATA is stored. If the read value (RV_3) and the existing value (OV) are different from each other, a shutdown or failure message is provided to the external device. In this case, the controller 150 may select one of the stop message and the fail message based on the environment setting information CS_DATA stored in the second storage unit 213.

The comparator 130 compares the value read from the location where the information USR_DATA is stored with the new value requested for writing through the read operation after the write operation of writing the new value in the location where the information USR_DATA is stored is completed.

The comparator 130 reads the value and the write request at the location where the information USR_DATA is stored through the read operation after the write operation for recording the new value requested to be recorded at the predetermined number of times the information USR_DATA is stored. Compare new values

The comparator 130 compares the value read from the location where the information USR_DATA is stored with the existing value through a read operation after the write operation of writing the existing value in the location where the information USR_DATA is stored is completed.

8 is a flowchart illustrating a method of writing data to an IC chip according to an embodiment of the present invention.

A read operation of reading an existing value is performed at a location where the information USR_DATA used in the operation of the IC chip 100 is stored (S710), and a write operation of writing the existing value to the IC chip 100 is performed (S720). .

Thereafter, a write operation is performed to record a new value requested to be recorded in the location where the information USR_DATA is stored (S730), and a value read from the location where the information USR_DATA is stored is compared with the new value requested to be written (S740). If the read value and the new requested value are different from each other, a write operation is performed to record the new requested value in a location where the information USR_DATA is stored a predetermined number of times at intervals of a predetermined time (S750). The value read from the stored position of the USR_DATA is compared with the new value requested for recording (S760).

If the read value and the new requested value are different from each other, a write operation is performed to write the existing value to the location where the information USR_DATA is stored (S770), and the value read from the location where the information USR_DATA is stored is compared with the existing value. (S780). If the read value and the existing value are different from each other, a stop message or a failure message is provided to the external device (S790).

FIG. 9 is a flowchart for explaining in detail the step of repeating the write operation illustrated in FIG. 8 a plurality of times.

A write operation of recording a new value requested to be recorded in a location where the information USR_DATA is stored is performed (S910). Thereafter, the value read from the location where the information USR_DATA is stored is compared with the new value (S920), and if it matches (S930-Y), the write operation may be terminated (S940). On the other hand, if there is a mismatch (S930-N), a write operation for recording a new value requested for writing in the location where the information USR_DATA is stored is performed again.

As such, after each write operation is completed, a value read from the location where the information USR_DATA is stored and a new data requested after the write operation is completed while performing a write operation for recording the new value requested to be recorded in the location where the information USR_DATA is stored a predetermined number of times. If the values match, the write operation for recording a new value requested to be recorded in the location where the information USR_DATA is stored a predetermined number of times may be completed.

In the meantime, the IC chip 100 according to the present invention has been described as sequentially performing a predetermined number of write operations and an operation of restoring an existing value when the write requested value is not normally stored, but is not limited thereto. According to an exemplary embodiment, the IC chip 100 may perform an operation of skipping a predetermined number of write operations and restoring an existing value, or performing a predetermined number of write operations without skipping an restoration of an existing value. have.

The present invention can also be embodied as computer-readable codes on a computer-readable recording medium. A computer-readable recording medium includes all kinds of recording apparatuses in which data that can be read by a computer apparatus is stored. Examples of the computer-readable recording medium include a ROM, a RAM, a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like in the form of a carrier wave . In addition, the computer-readable recording medium may be distributed to computer devices connected to a wired / wireless communication network, and a computer-readable code may be stored and executed in a distributed manner.

Although the preferred embodiments of the present invention have been described in detail above, the present invention is not limited to the specific preferred embodiments described above, and the technical field to which the present invention pertains without departing from the gist of the present invention claimed in the following claims. Anyone of ordinary skill in the art of various modifications can be made, of course, such changes are within the scope of the claims.

100: IC chip, 110: storage unit,
130: comparison unit, 150: control unit

Claims (10)

A storage unit which stores information used in the operation of the IC chip;
A comparator for comparing the first value with a second value read at the location where the information is stored after a first write operation of writing the first value at the location where the information is stored; And
And a controller configured to perform a second write operation of writing the first value at a location where the information is stored a predetermined number of times at intervals of a predetermined time when the second value and the first value are different from each other. ,
The storage unit stores a third value read from a location where the information is stored before the first write operation is performed.
The comparing unit compares the first value with the fourth value read from the location where the information is stored after the second write operation is completed,
And when the fourth value and the first value are different from each other, the controller performs a third write operation of writing the third value to a location where the information is stored. The method of claim 1,
The controller may be configured to terminate the second write operation when the third value read at the location where the information is stored after the write operation is completed during the second write operation by the predetermined number of times coincides with the first value. IC chip, characterized in that. delete The method of claim 1,
The storage unit stores the environment setting information used in the data write operation for the IC chip,
And the controller is further configured to perform the second write operation as many times as the predetermined number of times acquired based on the environment setting information. delete Comparing the first value with the second value read at the location where the information is stored after the first write operation of writing the first value at the location where the information used in the operation of the IC chip is stored is completed; And
And performing a second write operation of recording the first value at a location where the information is stored a predetermined number of times at intervals of a predetermined time when the second value and the first value are different from each other. ,
Storing a third value read in a location where the information is stored before the first write operation is performed;
Comparing the first value with a fourth value read at a location where the information is stored after the second write operation is completed; And
And if the fourth value and the first value are different from each other, performing a third write operation of writing the third value to a location where the information is stored. The method according to claim 6,
If the third value read from the location where the information is stored after every write operation is completed while performing the second write operation the predetermined number of times in the second write operation, the second value is the same; And a writing operation is terminated. delete The method according to claim 6,
In the performing of the second write operation, the second write operation is performed as many times as the predetermined number of times obtained based on the configuration information used in the data writing operation of the IC chip stored in the storage means of the IC chip. The data recording method. A computer-readable recording medium having recorded thereon a program for causing a computer to execute the data recording method according to any one of claims 6, 7, and 9.

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