Silicon Motion, Inc.

Ching-Ke Chen

Yu-Chi Lai

Yang-Chih Shen

Po-Sheng Chou

Yu-Han Hsiao

Tsu-Jung Chiang

Chin-Fen Tung

Wei-Chih Hsu

The present invention provides a method for accessing a flash memory module, wherein the method includes the steps of: writing data into a plurality of pages of a specific block, and establishes or updates a F2H mapping table based on physical addresses of the plurality of pages and logical addresses of the data; using the F2H mapping table to update a H2F mapping table; initializing a flush-bitmap, wherein the flush-bitmap records a plurality of flush bits corresponding to the physical addresses of the plurality of pages, respectively; receiving a trim command from a host device, wherein the trim command asks to mark at least one of the logical addresses of the data as invalid; updating the H2F mapping data according to the trim command; updating the flush-bitmap according to the trim command; and writing the updated H2F mapping table and the updated flush-bitmap into the flash memory module.

Method for accessing flash memory module and associated flash memory controller and electronic device

A data storage device including a non-volatile memory and a micro-controller is provided. The non-volatile memory stores a firmware file. The micro-controller is coupled to the non-volatile memory, and performs an encryption procedure on the firmware file. The encryption procedure includes: using a first key and a first algorithm to encrypt the firmware file to generate a signature, using the first key and a second algorithm to scramble the signature to generate a scrambled signature, and attaching the scrambled signature to the firmware file.

Data storage devices and methods for encrypting a firmware file thereof

A data storage device including a non-volatile memory and a micro-controller is provided. The non-volatile memory includes a plurality of data blocks. The micro-controller selects one of the data blocks as a source block and another one of the data blocks as a destination block. Also, the micro-controller duplicates data in the source block to the destination block, and when the data is corrupted and unrecoverable, stores an unrecoverable-error bit corresponding to the data into the destination block.

Data storage devices and methods for rebuilding a memory address mapping table

A storage device and a data storing method thereof are provided. The storage device includes a data storage medium and the control unit. The data storage medium includes a data storage area with a plurality of first type of data blocks. When a data reading operation is executed on a current data block of the data storage medium, the control unit determines whether a read count of the current data block is greater than a first threshold, determines whether the current data block is one of the first type of data blocks and generate a determination result according to the result, the control unit selects a plurality of first type of data blocks and switches the selected data blocks to a fast mode. Finally, the control unit moves data stored in the current data block to the selected data blocks under fast mode.

Storage device and data storing method thereof

Data storage devices and methods for encrypting and decrypting a firmware file thereof

A non-volatile memory operated through multiple channels. The non-volatile memory includes a plurality of chip-enable-signal controlled areas, each containing a plurality of dies. Simultaneous operations on the different dies of at least one target chip-enable-signal controlled space corresponding to a target channel are allowed. The control unit scans the non-volatile memory to check the health status of the dies of the target chip-enable-signal controlled space to assign a plurality of logical enable signals of the target channel to correspond to the dies of the target chip-enable-signal controlled space.

Data storage device and method for operating data storage device

A data storage device includes a flash memory and a controller. The flash memory includes a plurality of chips, each of the chips includes a plurality of pages, the pages are arranged to assemble into a super block, the pages of the super block are numbered 0&#x2dc;X from top to bottom of the super block, the pages with number 0&#x2dc;Y&#x2212;1 constitute a data area, and the pages with numbers Y&#x2dc;X constitute a RAID parity area. The controller corrects data of the data area according to data of the RAID parity area when the data in the data area cannot be successfully read.

Data storage device and data maintenance method thereof

A data storage device including a flash memory and a controller. The flash memory includes a plurality of chips, each of the chips includes a plurality of pages, the pages are arranged to assemble into a super block, the pages of the super block are numbered 0&#x2dc;X from top to bottom of the super block, the pages with number 0&#x2dc;Y&#x2212;1 constitute a data area, and the pages with numbers Y&#x2dc;X constitute a RAID parity area. The controller corrects data of the data area according to data of the RAID parity area when the data in the data area cannot be successfully read.

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Zhubei, Taiwan

Ching-Ke Chen