Memory mapping system and method

A technology of memory mapping and mapping tables, which is applied in the field of flash memory systems and can solve problems such as a large number of merge operations

Inactive Publication Date: 2008-08-13
SAMSUNG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The downside is that when using this approach, a lot of merge operations are required in order to create free blocks

Method used

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  • Memory mapping system and method
  • Memory mapping system and method
  • Memory mapping system and method

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Embodiment Construction

[0033] As shown in FIG. 1 , a memory mapped system is generally indicated by the reference numeral 100 . Memory mapped system 100 includes processor 116, flash memory 110 in signal communication with the processor, read only memory (ROM) 112 in signal communication with the processor, and random access memory (RAM) 114 in signal communication with the processor. For example, ROM 112 may include program steps executable by processor 116 for providing read and write commands to read data from or write data to flash memory 110 or RAM 114 . According to the memory-mapped embodiment of the present disclosure, read and write operations are performed within the flash memory 110 in response to read and write commands. Additionally, ROM 112 and RAM 114 may store related data structures and / or application program steps executable by processor 116 .

[0034] Turning to FIG. 2 , a flash card system is generally indicated by the reference numeral 200 . Flash memory card system 200 may be...

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Abstract

A system and method for memory mapping are provided, the system including a logical unit to physical unit map table, data unit groups in signal communication with the map table, and log unit groups, each associated with a corresponding one of the data unit groups, where updated data for any data unit within one of the data unit groups is stored in any log unit within the corresponding one of the log unit groups, and the method including receiving write data for a logical unit number from a host determining which of a plurality of data block groups comprises the logical unit number, and storing the write data in any unfilled log unit of a log block group corresponding to the determined data block group.

Description

[0001] This application claims foreign priority from Korean Patent Application No. P2007-0012198 filed in the Korean Intellectual Property Office on February 6, 2007, the disclosure of which is hereby incorporated by reference in its entirety. technical field [0002] Generally, this disclosure relates to flash memory systems. More particularly, the present disclosure relates to a flash memory system with a mapping table and a mapping method. Background technique [0003] Emerging portable electronic devices such as computers, digital cameras, digital music players, cellular telephones, personal digital assistants, and the like have increased use of flash memory, and in particular, flash memory cards. The flash memory card can be SSD, SD card, MMC, memory stick (MemoryStick) or embedded card (such as moviNAND, GBNAND and iNAND, etc.). [0004] The host typically communicates with the flash memory using a flash translation la...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F12/06
CPCG06F2212/7201G06F12/0246G06F12/06G06F12/00
Inventor 千源汶李洋燮
Owner SAMSUNG ELECTRONICS CO LTD
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