Data Storage Device and Data Retrieval Method

• US 20160239227A1
• Filed: 11/24/2015
• Published: 08/18/2016
• Est. Priority Date: 02/12/2015
• Status: Active Grant

• Current Assignee: Silicon Motion, Inc. (Silicon Motion)
• Original Assignee: Silicon Motion, Inc. (Silicon Motion)
• Inventors: Lin, Chin-Chi, Ho, Kun-Lin
• Granted Patent: US 11,061,764 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G06F 11/1008 in individual solid state devices G06F11/1004 takes precedence
• CPC Class Codes: G06F 11/1056 Updating check bits on partial write, i.e. read/modify/write
• CPC Class Codes: G06F 11/106 Correcting systematically all correctable errors, i.e. scrubbing
• CPC Class Codes: G06F 11/1068 in sector programmable memories, e.g. flash disk G06F11/1072 takes precedence
• CPC Class Codes: G06F 11/1076 Parity data used in redundant arrays of independent storages, e.g. in RAID systems
• CPC Class Codes: G11B 20/1833 by adding special lists or symbols to the coded information G11B20/1806, G11B20/1866 take precedence
• CPC Class Codes: G11C 2029/0411 Online error correction

Abstract

A data storage device includes a flash memory and a controller. The flash memory includes a plurality of dies, and each of the dies includes a first memory plane and a second memory plane, wherein each of the first memory plane and the second memory plane includes a plurality of physical pages. The controller retrieves data of a first physical page of the first memory plane and data of a second physical page of the second memory plane in response to a read command which is arranged to read a target page.

Claims

1. A data storage device, comprising:

a flash memory, comprising a plurality of dies, and each of the dies comprises a first memory plane and a second memory plane, wherein each of the first memory plane and the second memory plane comprises a plurality of physical pages; and

a controller, retrieving data of a first physical page of the first memory plane and data of a second physical page of the second memory plane in response to a read command which is arranged to read a target page.

2. The data storage device as claimed in claim 1, wherein the controller further comprises an error correction engine, and the controller further transmits the retrieved data of the first physical page and the retrieved data of the second physical page to the error correction engine to allow the error correction engine performs an error correction on the target page according to the retrieved data of the first physical page and the retrieved data of the second physical page.

3. The data storage device as claimed in claim 1, wherein the controller sequentially transmits a plurality of chunk read commands to the flash memory in response to the read command to retrieved a plurality of chunks of the target page which is constituted by the first physical page and the second physical page, wherein the controller retrieves a plurality of bytes of the first physical page and a plurality of bytes of the second physical page by two of the chunk read commands to obtain a first chunk of the chunks.

4. The data storage device as claimed in claim 3, wherein each of the chunks comprises a data sector and a parity code arranged to correct the data sector.

5. The data storage device as claimed in claim 3, wherein the controller further comprises an error correction engine, and the controller transmits the retrieved bytes of the first physical page and the second physical page retrieved by the two chunk read command to the error correction engine to allow the error correction engine perform the error correction on the first chunk according to the retrieved bytes of the first physical page and the second physical page.

6. The data storage device as claimed in claim 3, wherein each of the chunk read command comprises an address latch enable signal and a command latch enable signal.

7. A data retrieval method, applied to a flash memory, wherein the flash memory comprises a plurality of dies, each of the dies comprises a first memory plane and a second memory plane, each of the first memory plane and the second memory plane comprises a plurality of physical pages, and the data retrieval method comprises:

receiving a read command from a host, wherein the read command is arranged to read a target page; and

retrieving data of a first physical page of the first memory plane and data of a second physical page of the second memory plane in response to the read command.

8. The data retrieval method as claimed in claim 7, further comprising:

transmitting the retrieved data of the first physical page and the retrieved data of the second physical page to an error correction engine; and

performing an error correction on the target page according to the retrieved data of the first physical page and the retrieved data of the second physical page.

9. The data retrieval method as claimed in claim 7, wherein the step of retrieving the data of the first physical page of the first memory plane and the data of the second physical page of the second memory plane in response to the read command further comprises:

sequentially transmitting a plurality of chunk read commands to the flash memory according to the read command to sequentially retrieve a plurality chunks of the target page which is constituted by the first physical page and the second physical page, wherein two of the chunk read commands are respectively arranged to retrieve a plurality bytes of the first physical page and a plurality bytes of the second physical page to obtain a first chunk of the chunks.

10. The data retrieval method as claimed in claim 9, wherein each of the chunks comprises a data sector and a parity code arranged to correct the data sector.

11. The data retrieval method as claimed in claim 9, further comprising:

transmitting the bytes of the first physical page and the second physical page retrieved by the two of the chunk read commands to an error correction engine; and

performing the error correction on the first chunk by the error correction engine according to the retrieved bytes of the first physical page and the second physical page.

12. The data retrieval method as claimed in claim 9, wherein each of the chunk read commands comprises an address latch enable signal and a command latch enable signal.