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Storage card and access method thereof

A technology of memory card and storage area, which is applied in the direction of memory address/allocation/relocation, etc., and can solve problems such as inability to use memory cards and inability to read out registers

Inactive Publication Date: 2004-03-31
LEJIN GUANGDIAN ELECTRONIC CO LTD SHANGHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] At this time, although there is no effect on the memory space, there is a problem that the memory card cannot be used because the value of the register cannot be read.

Method used

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  • Storage card and access method thereof
  • Storage card and access method thereof

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Embodiment Construction

[0025] The structure of the memory card of the present invention is as shown in Figure 1, but as shown in Figure 4, the FAT file system includes: the user data area where actual data is stored, the file partition table that records the configuration information of the relevant files, and stores the relevant parts. The partition boot sector of the information is composed of the MBR area (Master Boot Recording Area) that stores the location information of the operating system. The above-mentioned MBR area is composed of the value of the CID register with memory card ID (address) information and the value of the CSD register with state information such as the size of the memory card, the size of the block, the access speed of the memory card, and the SD card information. The region of the SCR register value constitutes, and the operation process of the present invention is described below based on the above-mentioned content.

[0026] First of all, there are OCR, CID, CSD, RCA re...

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Abstract

The invention relates to the FAT file structure and access method for the storage card, wherein the value of the register for storing the essential information of the storage card is stored in the administration area from the client data area storing the real data, and from the storage card containing the file information management area FAT structure.íú

Description

(1) Technical field [0001] The present invention relates to a memory card and its access method, in particular to a memory card which stores the value of a register storing basic information of the memory card in a partial area of ​​the memory card and its access method. (2) Background technology [0002] With the rapid popularization of MP3 players recently, more and more storage devices for MP3 players are used, such as ATA flash memory cards, compact flash memory cards, MMC cards, and the like. [0003] The above-mentioned ATA flash memory card, compact flash memory card, MMC card, and SD card generally have their own formats for storing files, and the most representative one is the FAT (File Allocation Table: File Allocation Table) file system structure. [0004] As shown in Figure 1, the structure of the FAT file system includes the partition boot sector that stores the location information of each part, the master boot record area (hereinafter referred to as the MBR ar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F12/06
Inventor 郑泰焕金在容
Owner LEJIN GUANGDIAN ELECTRONIC CO LTD SHANGHAI
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