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Data write method, memory controller and memory device

A technology for writing memory controllers and data, applied in the fields of writing data to rewritable non-volatile memories, memory controllers and memory storage devices, can solve the problems of increased time for writing instructions, and achieve improved performance, The effect of shortening the time to execute the write command

Active Publication Date: 2015-05-06
PHISON ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because in the data merging program, the memory management circuit must search for valid data belonging to the same logical block, and the valid data belonging to the same logical block is copied to an empty physical block, based on this, the execution of the write command time will be greatly increased

Method used

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  • Data write method, memory controller and memory device
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  • Data write method, memory controller and memory device

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Embodiment Construction

[0055] In order to shorten the time for executing the write command, in the data writing method of the present invention, it will be judged whether the data to be written by the host system is a specific value (also called a preset pattern), and when the data to be written When the entered data is this specific value, the data will not actually be written into the rewritable non-volatile memory module of the memory storage device. Specifically, when the memory storage device is used as the main disk of the computer system (ie, as the disk for installing the operating system), the operating system will frequently only update a small portion of data. For example, when the information of the file system (fillesystem) is updated, only part of the data will be updated, while other parts of the data will remain “0” (that is, these data are meaningless values ​​(patterns)). In the data writing method of the present invention, the data belonging to this value will not actually be writ...

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Abstract

The invention relates to a data write method, a memory controller and a memory device. The method is used for a rewritable nonvolatile memory module with multiple physical blocks. Each physical block has a plurality of physical pages; part of the physical blocks map a plurality of logical blocks; and each logical block has a plurality of logical pages. The method comprises the following steps: receiving data, wherein the data has a plurality of data bits and belongs to one logical page; judging whether every data bit is a specific value; and when every data bit is a specific value, not writing the data into the physical page. Thus, the method provided by the invention can enhance the efficiency of the memory device.

Description

technical field [0001] The invention relates to a method for writing data, in particular to a method for writing data into a rewritable non-volatile memory and a memory controller and a memory storage device using the method. Background technique [0002] Digital cameras, mobile phones, and MP3 players have grown rapidly in recent years, making consumers' demand for storage media also increase rapidly. Since rewritable non-volatile memory (rewritable non-volatile memory) has the characteristics of data non-volatility, power saving, small size, no mechanical structure, and fast read and write speed, it is most suitable for portable electronic products, such as notebook computers. A solid state drive is a storage device that uses flash memory as a storage medium. Therefore, the flash memory industry has become a very popular part of the electronics industry in recent years. [0003] The flash memory module has multiple physical blocks (physical blocks), and each physical blo...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F12/06
Inventor 叶志刚
Owner PHISON ELECTRONICS