USING VARIOUS FLASH MEMORY CELLS TO BUILD USB DATA FLASH CARDS WITH MULTIPLE PARTITIONS AND AUTORUN FUNCTION

• US 20080147964A1
• Filed: 10/04/2007
• Published: 06/19/2008
• Est. Priority Date: 02/26/2004
• Status: Abandoned Application

• Current Assignee: Super Talent Electronics, Inc.
• Original Assignee: Super Talent Electronics, Inc.
• Inventors: Yu, Frank I-Kang, Shen, Ming-Shiang, Ma, Abraham C., Lee, Charles C., Chow, David Q.
• Application Number:
  US11/867,610
• Publication Number:
  US 20080147964A1
• Time in Patent Office: Days
• US Class Current: 711/103
• CPC Class Codes: G06F 21/32 using biometric data, e.g. fingerprints, iris scans or voiceprints
• CPC Class Codes: G06F 21/34 involving the use of external additional devices, e.g. dongles or smart cards
• CPC Class Codes: G06F 3/0632 by initialisation or re-initialisation of storage systems
• CPC Class Codes: G06F 3/0644 Management of space entities, e.g. partitions, extents, pools
• CPC Class Codes: G06F 3/0664 at device level, e.g. emulation of a storage device or system
• CPC Class Codes: G06F 3/0679 Non-volatile semiconductor memory device, e.g. flash memory, one time programmable memory [OTP]

Abstract

An electronic data flash card includes a processor and at least one flash memory device. The flash memory is partitioned such that it includes a first partition that is formatted using a file system that supports an Autorun function (e.g., CD-ROM file system (CDFS) format, fixed-disk format or Universal Disk Format (UDF)), and a disk partition that is formatted using a typical controller-based flash device file system (e.g., 16-bit File Allocation Table (FAT16) file system, 32-bit FAT (FAT32) file system, or New Technology File System (NTFS)). The electronic data flash card is produced such that Autorun-enabled application automatically executes a predetermined application or action when the electronic data flash card is installed in a host system. In one embodiment, the Autorun application includes an advertisement displayed on the host system prior to allowing access to data stored in the disk partition.

Claims

1. An electronic data flash card adapted to communicate with a host computer through a communication link established by the host computer over an interface bus, said electronic data flash card comprising:

(A) a card body;

(B) a flash memory device mounted on the card body and including a plurality of flash memory cells, wherein the plurality of flash memory cells include at least one autorun partition having a first file system format, and at least one disk partition having a second file system format, wherein at least one disk partition includes a public data partition and a secured data partition sharing an identical logical unit number (LUN) and located at different physical blocks, and wherein each physical block includes at least one bit to be used to indicate whether a data partition associated with the respective physical block is a secured data partition or a public data partition;

(C) an input/output interface circuit mounted on card body and including means for establishing said communication link between the host computer and the electronic data flash card when the electronic data flash card is operably connected to the host computer; and

(D) a flash memory controller mounted on the card body and electrically connected to said flash memory device and said input/output interface circuit, wherein the flash memory controller comprises;

means for automatically executing a predetermined application stored in said at least one autorun partition when said communication link is established between the host computer and the electronic data flash card; and

means for operating, after initiating execution of said predetermined application, in one of;

a programming mode in which said flash memory controller activates said input/output interface circuit to receive a data file from the host computer, and stores the data file in said disk partition;

a data retrieving mode in which said flash memory controller reads said data file from said disk partition, and activates said input/output interface circuit to transmit the data file to the host computer; and

a data resetting mode in which the data file is erased from the disk partition.

2. The electronic data flash card of claim 1, wherein said autorun partition is formatted using one of CD-ROM file system (CDFS) and Universal file system (UFS), and wherein said disk partition is formatted using one of a file allocation table (FAT) file system and a New Technology file system (NTFS).

3. The electronic data flash card according to claim 1, wherein said predetermined application comprises causing a display of the host computer to display a predetermined advertisement before operating in said one of said programming mode said data retrieving mode and said data resetting mode.

4. The electronic data flash card according to claim 3, wherein said predetermined advertisement is stored in said at least one autorun partition such that erasure of said predetermined advertisement in said programming and data resetting mode is prevented.

5. The electronic data flash card according to claim 1, wherein said predetermined application comprises means for causing the host computer to execute a predetermined diagnostic routine.

6. The electronic data flash card according to claim 1, wherein said predetermined application comprises means for causing the host computer to facilitate access to restricted data stored on the host computer.

7. The electronic data flash card according to claim 1, wherein said predetermined application comprises means for causing the host computer to implement predetermined user-customized system settings.

8. The electronic data flash card according to claim 1, wherein said at least one disk partition comprises at least one public partition and at least one secured partition.

9. The electronic data flash card according to claim 1, wherein the plurality of flash memory cells further comprise a reserved space including dynamic boot code and control code.

10. The electronic data flash card according to claim 1, further comprising an index coupled to the flash memory controller, wherein the index comprises information regarding a configuration of the at least one flash memory device, wherein the index provides access to the at least one autorun partition and the at least one disk partition.

11. The electronic data flash card of claim 10 wherein the index associates logic unit numbers (LUNs) with each of the at least one autorun partition and the at least one disk partition.

12. The electronic data flash card of claim 11 wherein one LUN corresponds to one or more of said at least one autorun partition and said at least one disk partition.

13. The electronic data flash card of claim 11 wherein the index maps the LUNs to logical block addresses (LBAs) and physical address blocks (PBAs) associated with the plurality of flash memory cells.

14. The electronic data flash card of claim 1 wherein the electronic data flash card comprises a universal serial bus (USB) compatible device.

15. The electronic data flash card of claim 1 wherein the flash memory controller comprises one of a 8032 processor, a 80286 processor, a RISC processor, an ARM processor, a MIPS processor and a digital signal processor.

16. The electronic data flash card of claim 1 wherein the input/output interface circuit comprises one of a Universal Serial Bus (USB), Secure Digital (SD), Multi-Media Card (MMC), Compact Flash (CF), Memory Stick (MS), PCI-Express (PCIE), Integrated Drive Electronics (IDE), and a Serial Advanced Technology Attachment (SATA) interface circuit.

17. The electronic data flash card of claim 1, wherein each physical block includes a plurality of pages, each page having a plurality of sectors, wherein each sector includes a data area and a spare area, and wherein the spare area includes an attribute indicating whether a data partition associated with the respective physical block is a secured data partition.

18. The electronic data flash card of claim 17, wherein each page includes four sectors each including a data area having a size of 512 bytes and a spare area having a size of 16 bytes, wherein the spare area includes an ECC (error correction code) field, a partition property field indicating whether the associated data partition is a secured partition, an LBA sector address field, and a parity field used to protect data stored in the partition property field and the LBA sector address field.

19. The electronic data flash card of claim 18, wherein the ECC field includes 12.5 bytes, wherein the partition property field includes one bit, wherein the LBA sector address field includes 23 bits, and wherein the parity field includes 4 bits.

20. A system comprising:

a host computer including an interface bus; and

an electronic data flash card adapted to communicate with the host computer through a communication link established by the host computer over the interface bus, said electronic data flash card comprising;

(A) a card body;

(B) a flash memory device mounted on the card body and including a plurality of flash memory cells, wherein the plurality of flash memory cells include at least one autorun partition having a first file system format, and at least one disk partition having a second file system format;

(C) an input/output interface circuit mounted on card body and including means for establishing said communication link between the host computer and the electronic data flash card when the electronic data flash card is operably connected to the host computer; and

(D) a flash memory controller mounted on the card body and electrically connected to said flash memory device and said input/output interface circuit,

wherein the host computer sends a first command to the electronic data flash card, the first command having one or more secured bytes generated using a first predetermined function based on a randomly generated seed (RGS) value,

wherein in response to and upon successfully verifying the first command, the flash memory controller sends a second command to the host computer, the second command having one or more secured bytes generated using a second predetermined function based on the RGS value,

wherein in response to and upon successfully verifying the second command, the host computer sends a third command to the electronic data flash card requesting for a password, the third command being scrambled with the RGS value, and

wherein in response to the third command, the electronic data flash card sends the requested password scrambled with the RGS value to the host computer, and thereafter, the host computer and the electronic data flash card exchange data protected by the password.