Flash memory data transmission method, flash memory storage system and controller

Abstract

The invention discloses a flash memory data transmission method, a flash memory storage system and a controller. The data transmission method is applied to data transmission from a cache memory to a plurality of flash memory groups through a single data bus in the flash memory storage system. The data transmission method comprises the step of: taking a logic block as a unit, and orderly arrangingand grouping data which are stored in the cache memory and belongs to continuous logical addresses; and the data transmission method also comprises the step of: transmitting sector data to each flashmemory group respectively through the single data bus according to the grouping in a staggering way, wherein the data belonging to the same logical block are to be transmitted and written into entityblocks of the same flash memory group. On the basis, the data are prevented from being dispersed into a plurality of entity blocks so as to reduce the abrasion of the entity blocks.

Description

technical field [0001] The present invention relates to a data transmission method for flash memory and a flash memory storage system using the method and its controller, in particular to a method for writing data to a flash memory chip with multiple flash memory chips through a single data bus A data transmission method and a flash memory storage system using the method and a controller thereof. Background technique [0002] The rapid development of digital cameras, cell phone cameras and MP3 players has led to a rapid increase in consumer demand for storage media. Because flash memory (Flash Memory) has the characteristics of data non-volatility, power saving, small size and no mechanical structure, it is suitable for portable applications, and is most suitable for this type of portable battery-powered products. A solid state drive is a storage device that uses NAND flash memory as a storage medium. [0003] Generally speaking, the flash memory die in the flash memory ch...

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Problems solved by technology

[0005] However, in the above operation process, data belonging to continuous logical addresses (that is, the same logical block) will be written into multiple physical blocks belonging to different flash memory dies, so when the controller only updates data belonging to one of them When storing data in logical blocks, the controller must still update and move data in multiple physical blocks at the same time, thus increasing the time required to write data

In addition, since multiple physical blocks need to be erased when updating data, the wear of the physical blocks will be increased and the lifespan of the flash memory storage system will be reduced

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