Smart card storage system and managing method for file creation in the system

Abstract

This invention relates to one intelligent card memory system and its management method, which comprises memory area and control unit, wherein, the memory area comprises file align list memory area and data memory area of the file content; the said file align list memory area comprises multiple file align list and the memory area comprises multiple data block; each file align list responds to one data block and the control unit finds file align list memory items and processing control according to the relationship.

Description

technical field [0001] The invention relates to an embedded field, in particular to a smart card storage system in the smart card and USB TOKEN field and a method for realizing file creation and management in the smart card storage system. Background of the invention [0002] With the continuous promotion and popularization of smart card applications, people's functional requirements for smart cards are becoming more and more diverse. The rich and colorful application requirements make the hardware technology level of smart cards change with each passing day: in terms of the number of CPU bits, from the initial 8-bit CPU to now widely From the 16-bit CPU that is currently used, to the 32-bit CPU that is being gradually promoted; in terms of memory types, from the initial ROM, RAM, EEPROM, to the current NOR FLASH, and then to the new NOR FLASH and NAND FLASH fusion technology; transmission interface On the Internet, from a single interface of ISO7816 to multi-channels integr...

AI Technical Summary

Problems solved by technology

[0009] (2) Since the file size is specified in advance when the file is created, once the file is created, the file size cannot be changed; during use, the file size is always a fixed value, and there may be insufficient space or space waste;

[0010] (3) When it is found during use that the pre-allocated space of one file is not enough and the pre-allocated space of another file is too large, an effective mechanism cannot be provided so that the spaces of the two files can complement each other;

[0011] (4) Files can be deleted, but the deleted space cannot be recycled by the system, because all newly created files are sequentially allocated on the basis of the original allocated address space; therefore, a large amount of storage space on the card is caused waste;

[0012] With the continuous diversification of smart card applications and the continuous increase of smart card memory capacity, this traditional file management method has become increasingly unable to meet the application requirements

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