KR100547789B1 - Portable terminal and method for exchanging data with external device using internal storage media - Google Patents

Abstract

A portable terminal capable of exchanging data with an external device using an internal storage medium according to the present invention has an internal storage medium and a data transmission module. Herein, the internal storage medium is provided inside the portable terminal, and the first and second file areas are respectively allocated to store data in the file system format dedicated to the portable terminal and data in the file system format dedicated to the external device. In addition, the data transmission module writes data in a file system format dedicated to a portable terminal to the first file area and reads the data written to the first file area, and provides an interface for exchanging data with an external device. The data transmitted from the external device is written in the second file area and the data written in the second file area is transmitted to the external device.

Multimedia card, MMC, Flash memory, Internal storage medium, External storage medium

Description

PORTABLE TERMINAL AND METHOD FOR EXCHANGING DATA WITH EXTERNAL DEVICE USING INTERNAL STORAGE MEDIA}             

1 is a diagram illustrating a connection structure of a portable terminal and a computer in which a multimedia card, which is a conventional external storage medium, is hardware-configured.

2 is a diagram showing a detailed configuration provided in a portable terminal for the implementation of FIG.

3 is a diagram illustrating a connection structure of a portable terminal having an internal storage medium having an external storage medium function and a computer for data exchange according to the present invention;

Figure 4 is a data on the internal storage medium also serves as an external storage medium according to the present invention

A block diagram showing in detail the data storage module provided in the portable terminal capable of storing the;

5 is a view showing a file structure of a data storage area provided in a flash memory of a portable terminal according to the present invention;

FIG. 6 is a flowchart illustrating a process of writing data to a flash memory in the computer of FIG. 4. FIG.

FIG. 7 is a flowchart illustrating a process in which a portable terminal reads data existing in a flash memory according to a data read request of a computer in FIG. 4.

The present invention relates to a portable terminal, and more particularly, to an external memory connected to a removable interface for storing data received from the external device in a wired connection with an external device (Multi Media Card: MMC). The present invention relates to a portable terminal that can easily store the data even though it is not provided.

The multimedia card is an external storage memory developed and produced by SanDisk in the United States and Siemens in Germany. The multimedia card has a small size, which is advantageous for making a small device, and the controller is easy to control because it has a built-in controller. However, because multimedia cards use a serial data bus, data transfer rates are significantly slower than smart media cards. Such multimedia cards are used as external storage media in MP3 players and portable terminals.

1 is a diagram illustrating a connection structure between a portable terminal and a computer in which a multimedia card, which is a conventional external storage medium, is hardware-configured.

As shown, the computer 20 and the portable terminal 30 are connected through a USB cable 24, and the portable terminal 30 is provided with an interface 32 to which the multimedia card 40 is detachably mounted.

When the USB cable 24 connected to the portable terminal 30 is connected, the computer 20 automatically recognizes the portable terminal 30 through a Plug and Play function. At this time, when the multimedia card 40 is mounted on the interface 32 of the portable terminal 30, the computer 20 recognizes the multimedia card 40 as a USB removable disk and creates and assigns a new removable disk. The computer 20 displays this progress on the screen 22 and displays on the screen 22 status information 10 for creating the multimedia card 40 as a removable disk.

Accordingly, the computer 20 allows the multimedia card 40 to be easily read and written in a drag and drop manner by downloading and uploading files, such as a hard disk.

2 is a diagram illustrating a detailed configuration provided in the portable terminal for the implementation of FIG.

An internal storage medium (Flash) 59 is provided in the portable terminal 30, and the multimedia card 58 is externally mounted through an interface provided in the portable terminal 30.

Data transmission between the computer 20 and the multimedia card 58 connected to the data storage module 50 of the portable terminal 30 performing read and write (read / write) functions of the data is performed as follows.

The data storage module 50 drives a USB interface (referred to as USB mass storage service) 56 and a multimedia card 58 to support mass storage, which is one of USB connection methods, to insert and withdraw data. The multimedia card (MMC) driver 56 may read and write data to the multimedia card (MMC) 58 which is an external storage device.

Looking at the operation of writing data to the multimedia card 58 in the computer 20, the computer 20 converts raw data into a file allocation table (FAT) format. At this time, the computer 20 converts the FAT format data into a Universal Serial Bus (USB) packet and transmits the data to the USB interface 52 of the data storage module 50 of the portable terminal 30 through the USB cable 24.

The USB interface 52 receives the USB packet from the USB cable 24, converts the USB packet into FAT format data, and transmits the data to the MMC driver 56. The MMC driver 56 writes the FAT format data transferred from the USB interface 52 to the multimedia card 58.

Meanwhile, the case where the computer 20 reads the data stored in the multimedia card 58 recognized as the moving disk will be described below. First, the computer 20 converts the recording position information of the data to be read and the size information of the data to be read into a USB packet and transmits them to the USB interface 52 of the portable terminal 30 through the USB cable 24.

The USB interface 52 detects the recording position information of the data and the size information of the data to be read from the USB packet transmitted from the computer 20 and transmits it to the MMC driver 56. The MMC driver 56 reads the FAT data located at the address of the multimedia card 58 based on the recording position information of the data and transmits it to the USB interface 52.

The USB interface 52 converts the FAT data transmitted from the MMC interface 52 into a USB packet and transmits it to the computer 20 through the USB cable 24.

On the other hand, the data transmission operation between the application unit 51 and the multimedia card 58 of the portable terminal 30 is performed as follows.

The data storage module 50 of the portable terminal 30 uses a file system to read and write data. Therefore, the data storage module 50 of the portable terminal 30 uses a file system to access the multimedia card 58 which is an external storage medium and the flash memory 57 which is an internal storage medium.

The data storage module 50 has an embedded file system (EFS2) file system unit 55 and an SFAT file system unit 54. The EFS2 file system unit 55 provides the EFS2 format data conversion, and the SFAT file system unit 54 provides the FAT format data conversion. The access unit 53 connects the application unit 51 with the EFS2 file system unit 55 and the SFAT file system unit 54.

The portable terminal application unit 51 accesses the EFS2 file system unit 55 and the SFAT file system unit 54 through the access unit 53. The access unit 53 determines whether to access the EFS2 file system unit 55 or the SFAT file system unit 54 with the directory name among the input file names. That is, the access unit 53 accesses the SFAT file system unit 54 if "nvm / mmc1" is included in the file name, and otherwise accesses the EFS2 file system unit 55.

The operation of writing data to the multimedia card 58 in the application unit 51 of the portable terminal 30 is as follows. The case where data of size "X" is written to a specific position having a file name "nvm / mmc1 / File_MMC1" will be described as an example. The application unit 51 transmits the "nvm / mmc1 / File_MMC1" file name and location in the file, the memory address where the data to be written is stored, and the "X" size information to the access unit 53.

The access unit 52 determines whether or not "nvm / mmc1" is included in the file name among the information transmitted from the application unit 51. Since the access unit 52 does not include "nvm / mmc1" in the file name, the access unit 52 accesses the SFAT file system unit 54 and transmits the information transmitted from the application unit 51 to the SFAT file system unit 54. do.

The SFAT file system unit 54 converts data to be written out of information transmitted from the access unit 52 into a FAT format. In addition, the SFAT file system unit 54 calculates the position of the multimedia card 58 in which data is to be stored from the file name and the location information in the file among the information transmitted from the access unit 52. Accordingly, the SFAT file system unit 54 transmits the location information of the multimedia card 58, FAT formatted data, and size information of the multimedia card 58 to which the data is to be stored, to the MMC driver 56.

The MMC driver 56 writes data to the multimedia card 58 based on the information transmitted from the SFAT file system unit 54.

The operation of reading data stored in the multimedia card 58 in the application unit 51 of the portable terminal 30 is as follows.

A case where the data of size "X" is read to a specific position of a file having a file name "nvm / mmc1 / File_MMC1" provided in the multimedia card 58 will be described as an example. The application unit 51 transmits the "nvm / mmc1 / File_MMC1" file name and location in the file, the memory address where the read data is to be stored, and the "X" size information to the access unit 53.

The access unit 53 checks whether "nvm / mmc1" is included in the file name among the information transmitted from the application unit 51. Since the access unit 53 includes "nvm / mmc1" in the file name, the access unit 53 accesses the SFAT file system unit 54 and transmits the information transmitted from the application unit 51 to the SFAT file system unit 54. do.

The SFAT file system unit 54 calculates the position of the data in the multimedia card 58 based on the file name and the location information in the file among the information transmitted from the access unit 53. In addition, the SFAT file system unit 54 transmits the location of the file in which the data to be read in the multimedia card 58 is stored, the memory address in which the read data is to be stored, and the data size information to the MMC driver 56.

The MMC driver 56 reads data from the multimedia card 58 based on the information transmitted from the SFAT file system unit 54.

As described above, in order to transmit and receive data between the computer 20 and the portable terminal 30 by a removable disk method or a USB mass storage transmission method, an external storage medium such as a separate multimedia card 58 is used. need.

In order to exchange data between the computer 20 and the portable terminal 30 in a manner other than a removable disk method or a USB mass storage transmission method, an existing storage terminal should use an internal storage medium such as a flash memory 59. . In this case, since the EFS2 file system unit 55 of the portable terminal 30 does not support the FAT file system of the computer 20, there is a problem in that a separate program for data transmission must be configured.

As such, when a separate dedicated data transmission program for data transmission is used, the transmission speed is limited by the data service processing speed of the portable terminal 30. Accordingly, there is a problem that the transmission speed is very slow to 1/20 to 1/25 when the external storage device is configured than the removable disk method or the USB mass storage transmission method.

In addition, since the use of the internal storage medium is limited by the data transfer module 50 constituted by software, there is a problem in that the use of the internal storage medium such as the flash memory 59 whose capacity is gradually increased is limited. Accordingly, there is a problem in that a large capacity of the internal storage medium cannot be used efficiently.

An object of the present invention for solving the above problems is to provide a portable terminal that can provide a fixed memory space provided in the portable terminal to the user in the form of an external storage device.

Another object of the present invention is to provide a portable terminal capable of exchanging data with an external device with a simpler configuration.

Still another object of the present invention is to provide a portable terminal capable of storing various types of data according to a user's purpose of using a fixed memory provided in the portable terminal.

Still another object of the present invention is to provide a portable terminal that provides an interface for exchanging data using a program provided in an external device when exchanging data with an external device such as a computer.

Still another object of the present invention is to provide a portable terminal capable of exchanging data at a higher speed without using a dedicated data exchange program to be provided in the portable terminal when exchanging data with an external device.

According to the present invention, a portable terminal connected to an external device and capable of mutual data exchange is provided in the portable terminal, and has data in a file system format dedicated to a portable terminal and data in a file system format dedicated to an external device. Internal storage media to which first and second file regions capable of storing the data are allocated; And writing data in a file system format dedicated to a portable terminal to a first file area and reading data written to the first file area, and providing an interface for exchanging the data with an external device. It is achieved by a portable terminal including a data transmission module for writing the transmitted data to the second file area and the data written to the second file area to an external device.

Preferably, the data transmission module has an interface, an external storage medium driver, a first file system unit, a second file system unit, and an internal storage medium driver.

The interface provides a protocol for exchanging data with external devices. The external storage medium driver provides information for writing data to the second file area of the internal storage medium and reading the written data. The first file system unit provides a command to the external storage medium driver to read and write file system format data dedicated to the external device. The second file system unit outputs a command for reading and writing the file system format data dedicated to the portable terminal. The internal storage medium driver writes data and writes data to the first file area and the second file area of the internal storage medium.

According to the present invention, by allocating a space for storing FAT-formatted data on the internal storage medium without connecting the external storage medium, it is possible to easily exchange data without having a program for data exchange in the external device. Can be. In addition, by configuring the internal storage medium to function as an external storage medium that can exchange data by connecting to an external device, it is possible to exchange data at a transfer rate faster than the transfer rate according to the existing data exchange.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention will be described in detail. It should be noted that the same elements in the figures are represented by the same numerals wherever possible. In addition, detailed descriptions of well-known functions and configurations that may unnecessarily obscure the subject matter of the present invention will be omitted.

According to the present invention, a portion of an internal storage medium, such as a flash memory, is formed in a portable terminal that does not have an interface for an external storage medium, such as a multimedia card (HMC) in hardware, that is, an internal storage medium. Emulation is provided so that the storage media can be used as an external storage media so that the multimedia card can be operated as if the multimedia card is connected to the portable terminal.

3 is a view illustrating a connection structure of a portable terminal having an internal storage medium having an external storage medium function and a computer for data exchange according to the present invention.

As shown, the portable terminal 200 does not have an interface for mounting an external storage medium to the outside since the internal storage medium having the function of the external storage medium of the present invention is built in the portable terminal 200. When the portable terminal 200 is connected through a USB cable, the computer 100 uses a plug and play function to store an internal storage medium (not shown) that functions as an external storage medium provided in the portable terminal 200. Recognize it as a medium. Accordingly, the computer 100 generates a removable disk file, allocates space, and displays the information 140 on the screen 120.

4 is a detailed block diagram illustrating a data storage module provided in a portable terminal capable of storing data in an internal storage medium having an external storage medium function according to the present invention.

In the present invention, by modifying the functions "mmc_read" and "mmc_write" of the internal functions of the MMC driver 360 that reads and writes data to an external storage medium, the MMC driver 360 flashes as an internal storage medium of the portable terminal. Configure to access flash memory 400. In addition, a predetermined area of the flash memory 400 is allocated to an area for a multimedia card function, which is an external storage medium, and converted into a FAT format.

In the present invention, data transmission between the computer 100 and the MMC driver 360 provided in the data transmission module 300 of the portable terminal 200 and between the application unit 310 and the MMC driver 360 of the data transmission module 300. The data transmission method is the same as the existing data transmission method. Therefore, modules provided in the upper layer of the MMC driver 360 maintain the existing configuration.

On the other hand, a file (file name: "nvm / mmc_emulation_file") having the same size as the capacity to be emulated by the MMC driver 360 in the EFS2 file system unit 350 by the MMC driver 360 is newly registered. This file is converted into FAT format as shown in FIG. 5 and stored in the data storage area of the flash memory 400.

In the present invention, the MMC driver 360 accesses the file converted into the FAT format so that data can be leased and written as if a multimedia card exists.

Data transmission between the computer 100 and the flash memory 400 which is an internal storage medium of the portable terminal 200 is performed in the following manner. The operation of reading and writing data to the flash memory 400 is performed by the USB interface 320, the MMC driver 360, and the EFS2 file system unit 350 of the data storage module 300.

First, the operation of writing data to the flash memory 400 in the computer 100 will be described. The computer 100 converts raw data to be written to the flash memory 400 into a FAT format. The computer 100 converts the FAT format data into a USB packet and transmits the data to the portable terminal 200 through a USB cable. The USB packet includes address information to be stored in the multimedia card and size information of the data to be stored.

The USB interface 320 provided in the data transmission module 300 of the portable terminal 200 receives a USB packet transmitted from the computer 100 through a USB cable, and stores data in FAT format data and a multimedia card among the USB packets. The address information to be stored and the size information of the data to be stored are detected and transmitted to the MMC driver 360.

The MMC driver 360 stores the FAT format data transmitted from the USB interface 320, address information to be stored in the multimedia card, and size information of the data to be stored in the flash memory 400, which is a file "nvm / mmc_emulation_file". Including the location information of " and transmitting it to the EFS2 file system unit 350.

The EFS2 file system unit 350 performs FAT format on the corresponding location of the flash memory 400 based on the location information of "nvm / mmc_emulation_file", FAT format data, and size information of data to be stored, transmitted from the MMC driver 360. The flash driver 370 is controlled to write data. Accordingly, the flash driver 370 writes FAT format data to a file (nvm / mmc_emulation_file) provided in the flash memory 400.

Therefore, by allocating a space for storing FAT format data in the flash memory 400 which is an internal storage medium without connecting an external storage medium, the data can be easily exchanged without having a program for exchanging data in an external device. Can be configured. In addition, the flash memory 400, which is an internal storage medium, is configured as an external storage medium function such as a multimedia card that can exchange data by connecting to an external device, thereby allowing data to be transferred at a faster transfer rate than that of the existing data exchange. I can exchange it.

The operation of reading data existing in the flash memory 400 which is an internal storage medium in the computer 100 is as follows.

The computer 100 converts the location information of the file to be read and the size information of the data to be read into the USB packet and transmits the converted information to the portable terminal 200 through the USB cable.

The USB interface 320 provided in the data storage module 300 of the portable terminal 200 receives a USB packet transmitted from the computer 100, and among the received USB packets, location information of a file to be read and a size of data to be read. The information is detected and transmitted to the MMC driver 360.

The MMC driver 360 calculates location information of a file (nvm / mmc_emulation_file), memory address information to be stored data to be read, and data size information to be read from the multimedia card, which is location information of a file to be read from the USB interface 320. To the EFS2 file system unit 350.

The EFS2 file system unit 350 stores the flash memory 400 based on the location information of the file (nvm / mmc_emulation_file) transmitted from the MMC driver 360, the memory address information where the read data is to be stored, and the data size information to be read. The flash driver 370 is controlled to read the corresponding position of and store the read data at an address corresponding to the memory address information in which the read data is to be stored. Accordingly, the flash driver 370 reads data from the flash memory 400, stores the read data at the address of the memory address information to be stored, and transmits the data to the EFS2 file system unit 350.

The EFS2 file system unit 350 transmits the data read from the flash driver 370 to the MMC driver 360. The MMC driver 360 transmits the read data transmitted from the EFS2 file system unit 350 to the USB interface 320. The USB interface 320 converts the read FAT format data transmitted from the MMC driver 360 into a USB packet and transmits the data to the computer 100 through a USB cable.

In the portable terminal 200, a data transmission method between the application unit 310 provided in the data transmission module 300 and the flash memory 400, which is an internal storage medium, is performed as follows.

The operation of writing data to the flash memory 400 by the application unit 310 is as follows. A case where data of size "X" is to be written to a specific position of a file having a file name "nvm / mmc1 / File_MMC1" will be described as an example. The application unit 310 transmits the "nvm / mmc1 / File_MMC1" file name and location in the file, memory address information in which data to be written is stored, and "X" size information to the access unit 330.

The access unit 330 detects a file name from the information transmitted from the application unit 310 and determines whether "nvm / mmc1" is included in the detected file name. The access unit 330 accesses the SFAT file system unit 340 when "nvm / mmc1" is included in the file name. At this time, the access unit 330 transmits the information received from the application unit 310 to the accessed SFAT file system unit 340.

The SFAT file system unit 340 converts data to be written among the information transmitted from the access unit 330 into a FAT format. In addition, the SFAT file system unit 340 calculates a position to be written to the multimedia card by using the file name and location information in the file among the information transmitted from the access unit 330. The SFAT file system unit 340 transmits the location information to be written to the multimedia card, data converted into FAT format, and data size information to the MMC driver 360.

The MMC driver 360 includes the location information of the file (nvm / mmc_emulation_file) in the FAT format data transmitted from the SFAT file system unit 340, the data size information, and the address information to be stored in the multimedia card. To send).

The EFS2 file system unit 350 is configured to write data to the flash memory 400 based on location information, FAT format data, and data size information of a file (nvm / mmc_emulation_file) transmitted from the MMC driver 360. 370 is controlled. Accordingly, the flash driver 370 writes data to a corresponding position of a file (nvm / mmc_emulation_file) provided in the flash memory 400.

Therefore, by using the flash memory 400 which is an internal storage medium as an external storage medium, it is possible to efficiently use the storage capacity of the large-capacity flash memory 400.

The operation of reading the data written to the flash memory 400 which is an internal storage medium by the application unit 310 provided in the data storage module 300 of the portable terminal 200 is performed as follows.

The case where data of size "X" is read to a specific position of a file having a file name "nvm / mmc1 / File_MMC1" is described as an example. The application unit 310 transmits the file name "nvm / mmc1 / File_MMC1", location information in the file, memory address information where the read data is to be stored, and "X" size information to the access unit 330.

The access unit 330 determines whether "nvm / mmc1" is included in the file name transmitted from the application unit 310. The access unit 330 accesses the SFAT file system unit 340 when "nvm / mmc1" is included in the file name. At this time, the access unit 330 transmits the information received from the application unit 310 to the SFAT file system unit 340 to access.

The SFAT file system unit 340 calculates the location of the stored data using the file name and the location information in the file, which are the information transmitted from the application unit 310, and the location in the flash memory 400 allocated for the FAT format data. Memory address information and data size information to be stored are transmitted to the MMC driver 360.

The MMC driver 360 calculates the location information of "nvm / mmc_emulation_file" with the address of the FAT format file provided in the flash memory 400 corresponding to the location information of the file transmitted from the SFAT file system unit 340, and The location information, memory address information to be stored, and data size information to be read are transmitted to the EFS2 file system unit 350.

The EFS2 file system unit 350 may determine the FAT of the flash memory 400 based on the location information of the file (nvm / mmc_emulation_file) transmitted from the MMC driver 360, the memory address information to be stored in the read data, and the data size information to be read. The flash driver 370 is controlled to read data from the file area. The flash driver 370 reads data from the flash memory 370 based on the information and stores the read data at a memory address where the read data is to be stored and transmits the data to the EFS2 file system unit 350.

5 is a view showing a file structure of a data storage area provided in the flash memory 400 of the portable terminal 200 according to the present invention.

The file FILE N + 1 (MMC image) newly provided in addition to the FAT file system structure provided in the existing flash memory is a file having a FAT formatted image. The EFS2 file system unit 350 accesses (reads and writes) the file FILE N + 1 to enable data transmission between the computer 100 and the portable terminal 200.

6 is a flowchart illustrating a process of writing data to a flash memory 400 in the computer 100 of FIG. 4. First, the computer 100 converts raw data to be written to the flash memory 400 into a FAT format (S110). The computer 100 converts the FAT format data into a USB packet (S120), and transmits the data converted into the USB packet to the portable terminal 200 through the USB cable (S130). The USB packet includes address information for storing data and size information of the data to be stored in the multimedia card.

The USB interface 320 provided in the data transmission module 300 of the portable terminal 200 receives a USB packet transmitted from the computer 100 through a USB cable and restores the data to a FAT format (S140). At this time, the USB interface 320 detects the FAT format data, the address information to be stored in the multimedia card, and the size information of the data to be stored in the restored FAT format and transmits the data to the MMC driver 360.

The MMC driver 360 stores the FAT format data transmitted from the USB interface 320, address information to be stored in the multimedia card, and size information of the data to be stored in the flash memory 400, which is a file "nvm / mmc_emulation_file". Include the location information of "and transmits to the EFS2 file system unit 350 (S150).

The EFS2 file system unit 350 performs FAT format on the corresponding location of the flash memory 400 based on the location information of "nvm / mmc_emulation_file", FAT format data, and size information of data to be stored, transmitted from the MMC driver 360. The flash driver 370 is controlled to write data (S160). Accordingly, the flash driver 370 writes FAT format data to a file (nvm / mmc_emulation_file) provided in the flash memory 400.

FIG. 7 is a flowchart illustrating a process in which the portable terminal 200 reads data existing in the flash memory 400 according to a data read request of the computer 100 in FIG. 4.

First, the computer 100 converts location information of a file to be read and size information of data to be read into a USB packet and transmits the converted information to a portable terminal 200 through a USB cable (S210).

The USB interface 320 provided in the data storage module 300 of the portable terminal 200 receives the USB packet transmitted from the computer 100 and restores it to the FAT format (S220). At this time, the USB interface 320 detects the position information of the file to be read and the size information of the data to be read in the restored FAT format and transmits the information to the MMC driver 360 (S230).

The MMC driver 360 calculates location information of a file (nvm / mmc_emulation_file), memory address information to be stored data to be read, and data size information to be read from the multimedia card, which is location information of a file to be read from the USB interface 320. The data is transmitted to the EFS2 file system unit 350 (S240).

The EFS2 file system unit 350 of the flash memory 400 is based on the location information of the file (nvm / mmc_emulation_file) transmitted from the MMC driver 360, the memory address information on which the read data is to be stored, and the data size information to be read. The flash driver 370 is controlled to read the corresponding position and store the read data at an address corresponding to the memory address information in which the read data is to be stored (S250). Accordingly, the flash driver 370 reads data from the flash memory 400, stores the read data at the address of the memory address information to be stored, and transmits the data to the EFS2 file system unit 350.

The EFS2 file system unit 350 transmits the data read from the flash driver 370 to the MMC driver 360. The MMC driver 360 transmits the read data transmitted from the EFS2 file system unit 350 to the USB interface 320. The USB interface 320 converts the data of the read FAT format transmitted from the MMC driver 360 into a USB packet (S260) and transmits the data to the computer 100 through the USB cable (S276).

According to the present invention, by allocating a space for storing FAT-formatted data on the internal storage medium without connecting the external storage medium, it is possible to easily exchange data without having a program for data exchange in the external device. Can be.

In addition, by configuring the internal storage medium to function as an external storage medium that can exchange data by connecting to an external device, it is possible to exchange data at a transfer rate faster than the transfer rate according to the existing data exchange.

In addition, by using the flash memory which is an internal storage medium as an external storage medium, it is possible to efficiently use the storage capacity of a large flash memory.

In the above, specific preferred embodiments of the present invention have been illustrated and described. However, the present invention is not limited to the above-described embodiment, and various modifications can be made by any person having ordinary skill in the art without departing from the gist of the present invention attached to the claims. will be.

Claims (16)

In a portable terminal connected to an external device and mutual data exchange is possible, An internal storage medium provided inside the portable terminal and having first and second file regions allocated therein for storing data of a file system format for an internal storage medium of the portable terminal and data of a file system format for an external device, respectively; ; And Write data in the file system format for the internal storage medium to the first file area, read data written to the first file area, and provide an interface for exchanging data with the external device. And a data transmission module for writing data transmitted from the external device to the second file area and transmitting data written to the second file area to the external device. The method of claim 1, The data transmission module, An interface providing a protocol for exchanging the data with the external device; An external storage medium driver for writing data to a second file area of the internal storage medium and providing information for reading the written data; A first file system unit providing a command to the external storage medium driver to read and write the file system format data for the external device; A second file system unit outputting a command to read and write the file system format data for the internal storage medium; And And an internal storage medium driver for writing data and reading the written data in the first file area and the second file area of the internal storage medium. The method of claim 2, The file system format for the internal storage medium is a portable terminal, characterized in that the EFS2 format. The method of claim 3, wherein And the file system format for the external device is a FAT format. The method of claim 4, wherein The first file system unit processes a SFAT file system format. The method of claim 4, wherein And the second file system unit processes an EFS2 file system format. The method of claim 4, wherein The interface is a portable terminal, characterized in that the USB interface. The method of claim 4, wherein And the internal storage medium is a flash memory. The method of claim 8, The internal storage medium driver is a flash terminal, characterized in that the flash driver. The method of claim 2, The external storage medium driver is a multi-media card (MMC) driver, characterized in that the portable terminal. The method of claim 2, An application unit for outputting a command to cause data to be read and written; And And an access unit which accesses any one of the first file system unit and the second file system unit based on the file name included in the read and write commands of the application unit and outputs information transmitted from the application unit. Portable terminal made with. The internal storage medium to which the first and second file areas are respectively allocated to store the data in the file system format for the internal storage medium and the data in the file system format for the external device, and the data in the file system format for the internal storage medium. Write to a first file area and read data written to the first file area, provide an interface for exchanging the data with the external device, and transfer the data transmitted from the external device to the second file. A data exchange method between a portable terminal and an external device having a data transfer module for writing to a region and data written to the second file region to the external device, Receiving data converted into a format for an interface with the external device and converting the data into a file format for the external device; Including location information of a file registered in the second file area in the data converted into the file format for the external device; Controlling to write data of the format for the external device to the second file area based on the location information; And And writing the data of the format for the external device in the second file area. The method of claim 12, And the file system format for the internal storage medium is an EFS2 format. The method of claim 13, And the file system format for the external device is a FAT format. The method of claim 14, The external device and the interface is characterized in that a USB interface is used. The method of claim 15, The data transmitted from the external device through the USB interface includes address information for storing data and size information of data to be stored in the second file area.

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