TWI604306B - Data management method for data storage device and memory controller - Google Patents

Description

Data storage device, memory controller and data management method thereof

The present invention relates to a data management method, and more particularly to a data management method for reducing the number of non-volatile memory readings and increasing data reading efficiency, and a corresponding memory controller and data storage device.

Non-volatile memory is an electronic memory device that has the ability to maintain information, fast data reading, and shock resistance without additional power. It is widely used in memory cards, solid state drives, and portable multimedia devices. When the data stored in the non-volatile memory is repeatedly read repeatedly, the non-volatile memory may have a read Disturbance, which may result in incorrect storage data, so the non-volatile memory At this point, it is necessary to refresh (Refresh), but non-volatile memory refresh will affect its service life.

Data storage devices that use non-volatile memory as a data storage medium have limitations in system performance, and this limitation is limited by the physical characteristics of non-volatile memory and the hardware and software design of the data storage medium. How to adjust the software and hardware design of the data storage medium to break through this limitation to provide better system performance is the goal of the manufacturer of the data storage medium.

In order to solve the above drawbacks, the present invention provides a data management method, a data storage device and a memory controller to improve the efficiency of reading data by the data storage device.

The present invention provides an embodiment of a data management method for a data storage device. The data storage device includes non-volatile memory. The non-volatile memory includes a plurality of data pages, and each data page is used to store multiple data. The method includes: receiving a read command; when a target data of the read command is stored in a temporary storage device, reading the target data from the temporary storage device; and determining whether a data amount of a remaining data of the temporary storage device is More than one threshold, wherein the remaining data is part of a follow-up data and the target data has a relationship with the remaining data in the data reading; and when the judgment is no, the data of at least one subsequent data page of the target data is stored. To the data temporary storage device.

The present invention further provides another embodiment of a data management method for a data storage device. The data storage device includes a non-volatile memory, and the non-volatile memory includes a plurality of data pages, each of which is used to store a plurality of data. The method includes: receiving a read command; reading, by the data temporary storage device, a target data according to the read command; determining whether a data amount of a remaining data of the temporary storage device is greater than a threshold value, wherein The remaining information is part of a follow-up data and the target data has a relationship with the remaining data in the reading of the data; when the judgment is no, the data of at least one subsequent data page of the target data is recorded to the temporary storage device of the data. .

The present invention provides a data storage device for a data management method, which includes a non-volatile memory, a temporary data storage device, and a memory controller. The non-volatile memory includes a plurality of data pages, and each data page is stored. a plurality of data storage means for storing the plurality of data, the memory controller is electrically coupled to the non-volatile memory and the data temporary storage device, and the memory controller is configured to receive the read command, and Reading, by the data temporary storage device, a target data according to the read command, and the memory controller determines whether a data amount of a remaining data of the temporary storage device is greater than a threshold value, wherein the remaining data is part of a subsequent data. And the target data and the remaining data have a relationship between the data reading and the reading, if the judgment is no, the memory controller stores the data of at least one subsequent data page of the target data to the temporary storage device.

The invention provides a memory controller for a data management method, which comprises a first communication interface, a second communication interface, a third communication interface and a microprocessor. The first communication interface is for communicating with the non-volatile memory to access the non-volatile memory, and the second communication interface is for communicating with the data temporary storage device to access the temporary storage device, and the third communication interface is used The microprocessor is in communication with the host to receive the read command from the host, and the microprocessor is electrically coupled to the first communication interface, the second communication interface, and the third communication interface, and the microprocessor is configured to temporarily store the data according to the read command. The device reads a target data, and the microprocessor determines whether a data amount of a remaining data of the temporary storage device is greater than a threshold value, wherein the remaining data is part of a subsequent data and the target data and the remaining data are read in the data. There is a relationship between the front and back. When the microprocessor determines no, the microprocessor records the data of at least one subsequent data page of the target data to the temporary storage device.

In summary, the present invention can pre-read the subsequent data page to the temporary storage device before the current data page is read, so that the temporary storage device can store more than one data page. When receiving a read command for reading subsequent data, the data storage device can not only quickly read the required data from the data temporary storage device, but also reduce the number of times the non-volatile memory is read, when multiple read commands continue When the data corresponding to the sending and reading command has not been stored in the temporary storage device, the data storage device can quickly read the corresponding data from the non-volatile memory and store it in the temporary storage device without waiting for more The delay time caused by the pen reading instruction effectively improves the efficiency of reading data from the data storage device.

The above and other objects, features, and advantages of the present invention will become more apparent from the description of the appended claims.

Please refer to FIG. 1. FIG. 1 is a schematic diagram of an embodiment of a data storage device. The data storage device 10 is configured to communicate with an external host 20, and reads data stored in the data storage device 10 according to a read command sent by the host 20. The data may be image data for display or audio data, etc., and the host computer 20 may be an electronic device such as a desktop computer or a tablet computer. The data storage device 10 includes a memory controller 11, a non-volatile memory 12, and a data temporary storage device 13. The non-volatile memory 12 is, for example, a flash memory or a magnetoresistive random access memory ( Magnetoresistive RAM), phase-change memory or ferroelectric RAM, etc., which have long-term data storage data storage medium, and the data temporary storage device 13 is, for example, a dynamic random access memory. (Dynamic Random Access Memory, DRAM), the memory controller 11 is electrically coupled to the host 20, the non-volatile memory 12, and the data temporary storage device 13.

The memory controller 11 further includes a first communication interface 111, a second communication interface 112, a third communication interface 113, and a microprocessor 114. The microprocessor 114 is coupled to the first communication interface 111, the second communication interface 112, and the third The communication interface 113 is electrically coupled, and the memory controller 11 can communicate with the non-volatile memory 12 via the first communication interface 111 and access the non-volatile memory 12, and the memory controller 11 can be connected by the second communication. The interface 112 communicates with the data temporary storage device 13 and accesses the data temporary storage device 13. The memory controller 11 can communicate with the host 20 via the third communication interface 113. The non-volatile memory 12 includes a plurality of data blocks. (Block), each data block includes a plurality of pages (Page), each data page is used to store the data, so the memory controller 11 can sequentially read the data required by the host 20 according to the read command. .

In addition, the first communication interface 111 is, for example, an open NAND flash interface (ONFI) or Toggle. The second communication interface 112 is, for example, a DFI interface (DDR PHY Interface). The third communication interface 113 is, for example, a SATA interface (Serial Advanced Technology Attachment), a Universal Serial Bus (USB), a Peripheral Component Interconnect Express (PCI Express), and a serial small computer system. Serial Attached SCSI (SAS), Universal Flash Storage (UFS), Embeded MultiMedia Card (eMMC) and SD Digital Interface (Secure Digital Input/Output).

In order to provide better system performance of the data storage device 10 and reduce the number of times the non-volatile memory 12 is read, the present invention discloses a data management method in which data that may be read in the non-volatile memory 12 is advanced. The data storage device 10 can be quickly responded to the read command of the host 20 to improve the system performance of the data storage device 10. Hereinafter, an embodiment of the data management method of the present invention will be described with reference to FIG. 1, FIG. 2 and FIG. 3. For simplicity of explanation, the non-volatile memory 12 includes a plurality of data pages, including a data page P1 to a data page P8 and other data pages ( Omitted), each data page contains 3 sections, which is the smallest unit of data storage, and is also the basis for data addressing. The size of each segment corresponds to a logical block address (LBA, Logical Block Address), and the size of each LBA is preferably 512 bytes. However, the user can set the size of each data page according to its actual needs, for example: 4096 bytes or 8192 bytes; or set the number of segments included in each data page, for example, 8 segments or 32 sectors; or set the size of each logical data block address, for example: 1024 bytes or 4096 bytes, technically feasible, and therefore not limited to this.

The non-volatile memory 12 stores four files, each of which is given a specific file ID. Since each file has a specific file identification code, the microprocessor 114 records the start address of all the data pages of the specific file according to the file identification code; or stores the start bit of the first data page of the specific file. The address of the first data page is used to know the starting address of the subsequent data page until the symbol at the end of the file is found. In general, files are usually stored discontinuously. However, the manufacturer can store each file in sequence and continuously to the data temporary storage device 13 in advance, in which case all the data pages of each file are adjacent and Store in order. Since the starting address is known, the absolute address of each data can be known based on the relative address of each data page.

As shown in FIG. 3, the file a is stored in the material pages P1, P2, and P3, the data pages P1, P2, and P3 are adjacent data pages, and the data pages P2 and P3 are subsequent data pages of the data page P1. The data page P1 contains 3 pieces of data, namely data a11, data a12 and data a13; data page P2 contains 3 pieces of data, namely data a21, data a22 and data a23; data page P3 contains 3 pieces of data, ie data a31, data a32 And information a33. The file b is stored in the data pages P4 and P5, the data pages P4 and P5 are adjacent data pages, and the data page P5 is the subsequent data page of the data page P4. The data page P4 contains 3 pieces of data, namely data b11, data b12 and data b13; the data page P5 contains 3 pieces of data, namely data b21, data b22 and data b23. The file c is stored in the data pages P6 and P7, the data pages P6 and P7 are adjacent data pages, and the data page P7 is the subsequent data page of the data page P6. The data page P6 contains 3 pieces of data, namely the data c11, the data c12 and the data c13; the data page P7 contains 3 pieces of data, namely the data c21, the data c22 and the data c23. The file d is stored in the data page P8, and the data page P8 contains three pieces of data, namely the data d11, the data d12 and the data d13.

First, in step S201, a read command is received. When the host 20 shown in FIG. 1 wants to read the target data stored in the data storage device 10, for example, the data a11 of the file a, the host 20 sends the read command to the data storage device 10, and the data storage device 10 The processor 114 receives the read command transmitted by the host 20 through the third communication interface 113.

In step S203, it is determined whether the target data corresponding to the read command is stored in the data temporary storage device 13. After receiving the read command, the microprocessor 114 obtains the storage address of the target data according to the address information included in the read command, and determines whether the target data is stored in the temporary storage device 13 according to the storage address. If yes, go to step S209; if not, go to step S205. The data temporary storage device 13 is preferably a dynamic random access memory (DRAM), or a static random access memory (SRAM), and the average reading speed is better than non- Data buffer or data buffer for volatile memory 12. It is assumed that the data a11 of the file a is stored only in the non-volatile memory 12 and is not stored in the data temporary storage device 13, and therefore, step S205 is performed.

Step S205, reading the data page containing the target data and returning the target data. The microprocessor 114 reads the data page including the target data, that is, the data page P1, according to the storage address to the non-volatile memory 12, to obtain the target data, that is, the data a11, and returns the target data through the third communication interface 113. To the host 20.

In another embodiment, step S205 is changed to read the data page including the target data and the subsequent data page, and return the target data. In this embodiment, the subsequent data page may be a data page, that is, the data page P2; the subsequent data page may also be two data pages, that is, the data pages P2 and P3, and the number of subsequent data pages may be according to the needs of the user. Adjustment is not limited to this. Assuming that the host 20 wants to read a continuous number of data, since the subsequent data page has been read and stored in the temporary storage device 13, when the host 20 wants to read multiple pieces of data containing the target data, the microprocessor 114 is in the subsequent In the step, the data can be provided to the host 20 at a speed.

In step S207, the subsequent data is stored in the temporary storage device 13, wherein the target data and the subsequent data are stored in the same data page. The microprocessor 114 obtains the target data from the data page P1, and can also obtain the subsequent data of the target data, including the data a12 and the data a13, and store the subsequent data in the data temporary storage device 13. In addition, the step S207 can further store the target data to the data temporary storage device 13. The advantage of not storing the target data to the data temporary storage device 13 is that the space usage of the data temporary storage device 13 can be saved; on the contrary, the target data is stored to the data temporarily. The advantage of the storage device 13 is that when the target data is repeatedly read, the microprocessor 114 can directly return the target data from the data temporary storage device 13 to the host 20, thereby increasing the performance of the data reading.

In step S209, the target data is returned. When the determination in step S203 is YES, that is, the target data is stored in the data temporary storage device 13, the microprocessor 114 reads the target data, such as the data a12, according to the storage address to the data temporary storage device 13, and the target is read. The data is transmitted to the host 20 via the third communication interface 113. In addition to reducing the number of times the microprocessor 114 performs step S205, this embodiment can also increase the efficiency of data reading.

Step S211, determining whether the amount of data of the remaining data stored in the temporary storage device 13 is greater than a threshold value, wherein the remaining data is part of the subsequent data and the relationship between the target data and the remaining data in the data reading, and subsequent The data minus the target data is equal to the remaining data. Assuming that the threshold value is a sector, the target data is the data a11. When the step S207 is executed, the data a11 is transmitted to the host 20, and the data a12 and the data a13 are stored to the data temporary storage device 13. When the step S209 is executed, the target data has been updated to the data a12 and the target data is transmitted to the host 20, so that the remaining data stored in the data temporary storage device 13 only has the data a13, which is only one segment size and not larger than Since the threshold value is NO, the determination result in step S211 is NO, so step S213 is executed. Conversely, if the result of the determination in step S211 is true, the process returns to step S201 to wait for the next read command. In another embodiment, the threshold value may be the size of the data amount, such as 1024 bytes or other values, preferably an integer multiple of one segment size. In addition, the amount of data of the remaining data may also be represented by the difference of the address. For example, the value of the maximum address value of the remaining data minus the value of the minimum address value is the difference of the address, in which case the threshold value is Preferably, it is smaller than the number of segments included in the data page, such as an integer of 2, but not limited thereto.

In step S213, the data of the subsequent data page is stored in the data temporary storage device 13. The microprocessor 114 obtains the address of the current data page and the subsequent data page according to the file identification code, and can read the subsequent data page from the non-volatile memory 12 according to the address of the subsequent data page; or the microprocessor 114 can The subsequent data page of the current data page, such as the data page P2, is directly read, and the data of the subsequent data page, including the data a21, the data a22, and the data a23, are stored in the temporary storage device 13. When the data a21, the data a22, and the data a23 are stored in the temporary storage device 13, the data a13 originally stored is added, and the amount of the remaining data is changed to four segments and is greater than the threshold. Finally, returning to step S201, it waits for the next read command. In another embodiment, step S213 is changed to store the data of the subsequent plurality of data pages in the data temporary storage device 13, for example, the data page P2 and the data page P3. Assuming that the host 20 wants to read a continuous number of data, the subsequent plurality of data pages are read in step S213 and the data of the subsequent plurality of data pages are stored to the temporary storage device 13, except that the microprocessor 114 can be reduced to perform step S213. The number of times can also increase the efficiency of data reading.

Next, an embodiment of the data management method of the present invention will be described again with reference to FIGS. 4A and 4B. Referring to FIG. 4A, FIG. 4A is a schematic diagram of a conventional data management method. The horizontal axis is time Time, and the plurality of data shown in the upper half of FIG. 4A is the host 20 by reading instructions to the memory. The target data required by the controller 11, as shown in the lower half of Fig. 4A, is a plurality of data pages stored by the memory controller 11 to the data temporary storage device 13 in accordance with the read command. When the host 20 issues the first read command at time T1 and reads the read command of the data a11 of the file a, the memory controller 11 reads the data page P1 from the non-volatile memory 12 in step S205. The data a12 and the data a13 are stored in the data temporary storage device 13 in step S207. Next, at time T2, the host 20 issues a read command to read the data b11 of the file b. At this time, the memory controller 11 is still processing the data page P1 and cannot process the read command. Until time T3, the memory controller 11 reads the material page P4 from the non-volatile memory 12 in step S205 and stores the data b12 and the data b13 in the data temporary storage device 13 in step S207. At time T3, the host 20 issues a read command to read the data c11 of the file c. At this time, the memory controller 11 is still processing the data page P4 and cannot process the read command. Until time T32, the memory controller 11 reads the material page P6 from the non-volatile memory 12 in step S205 and stores the data c12 and the data c13 in the data temporary storage device 13 in step S207.

At time T6, the host 20 issues a read command of the data a21 of the file a. In step S205, the memory controller 11 reads the data page P2 from the non-volatile memory 12 and stores the data a22 and the data a23 to the step S207. The data is temporarily stored in the device 13. As is apparent from FIG. 4B, the memory controller 11 receives the read command of the data a21, that is, between the times T5 and T6, since the target data requested by the host 20 is already present in the data temporary storage device 13. Therefore, the memory controller 11 does not access the non-volatile memory 12, and this time is also called the standby time Ts. At time T7, the host 20 issues a read command of the data d11 of the file d. At this time, the memory controller 11 is still processing the data page P5, and then the data page P7 is processed, so the read cannot be processed. Take instructions. Until time T8, the memory controller 11 reads the material page P8 from the non-volatile memory 12 in step S205 and stores the data d12 and the data d13 in the data temporary storage device 13 in step S207. Between time T7 and T8, since the memory controller 11 is still processing the data pages P5 and P7 and cannot read the data page P8, this time is also referred to as the delay time Td.

Next, please refer to FIG. 4B. FIG. 4B is an embodiment of a data management method according to the present invention. In the figure, the horizontal axis is time Time, and the plurality of materials shown in the upper half of FIG. 4B are the data requested by the host 20 to the memory controller 11 by the read command, and the memory control is shown in the lower half of FIG. 4B. The device 11 stores the data page of the data temporary storage device 13 according to the read command, wherein the same time component symbol in FIG. 4A and FIG. 4B refers to the same time point, for example, the time point of time T1 in FIG. 4A and the time of FIG. 4B. T1 is the same, and so on with other identical time component symbols. First, similar to FIG. 4A, the memory controller 11 sequentially reads the data pages P1, P4, and P6 according to the read command of the host 20 and stores the data a12, a13, b12, b13, c12, and the data c13 to the temporary storage of the data. Device 13. When the host 20 issues a read command of the data a12 of the file a at time T31, the target data is updated to the material a12 in step 209 and transmitted to the host 20, so that only the data a13 remains for the remaining data, so that the judgment of step S211 is made. If the result is no, the data page P2 is read from the non-volatile memory 12 in step S213, and the data a21, the data a22, and the data a23 are stored in the data temporary storage device 13. Time T32 and time T33 occur similarly to the operation of time T31, except that the data page being read is the material page P5 and the material page P7. Since the standby time Ts is no longer present due to the execution of step 213, the data of the subsequent data pages, that is, the data pages P2, P5, and P7, is read and stored in advance to the data temporary storage device 13. The advantage of pre-reading is the elimination or reduction of the standby time Ts, thus eliminating or reducing the delay time Td. As shown in FIG. 4B, at time T7, the host 20 issues a read command of the data d11 of the file d, at which time the memory controller 11 can quickly respond to the read command of the host 20. In step S205, the memory controller 11 reads the material page P8 from the non-volatile memory 12 and stores the data d12 and the data d13 in the data temporary storage device 13 at step S207, and therefore, the delay time Td is eliminated.

In summary, the data management method of the present invention can determine whether the data amount currently stored in the data temporary storage device 13 is quickly read (or greater than the threshold), and if so, the subsequent data page is read in advance and The data of the subsequent data page is stored in the data temporary storage device 13, so that when the host 20 sends the read command, the memory controller 11 can quickly transfer the target data or read the target data from the non-volatile memory 12. Reducing the effect of the delay time Td not only reduces the number of readings of the non-volatile memory, but also effectively reduces the idle and waiting time of the memory controller 11, and greatly improves the efficiency of data reading.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention. Any one skilled in the art can make some modifications and retouchings without departing from the spirit and scope of the present invention. The scope is subject to the definition of the patent application scope.

10‧‧‧Data storage device
11‧‧‧ memory controller
111‧‧‧First Communication Interface
112‧‧‧Second communication interface
113‧‧‧ third communication interface
114‧‧‧Microprocessor
12‧‧‧ Non-volatile memory
13‧‧‧Information temporary storage device
20‧‧‧Host
S201, S203, S205, S207, S209, S211, S213‧‧ steps
P1, P2, P3, P4, P5, P6, P7, P8‧‧‧ data pages
T1, T2, T3, T31, T32, T33, T5, T6, T7, T8‧‧‧ time
A11, a12, a13, a21, a22, a23, a31, a32, a33, b11, b12, b13, b21, b22, b23, c11, c12, c13, c21, c22, c23, d11, d12, d13‧‧ data
Td‧‧‧Delayed time
Ts‧‧‧ Standby time

1 is a schematic diagram of an embodiment of a data storage device of the present invention. 2 is a schematic diagram of an embodiment of a step of a data management method according to the present invention. 3 is a schematic diagram of an embodiment of a data page of the present invention. 4A is a schematic diagram of an embodiment of a data management method. FIG. 4B is a schematic diagram of an embodiment of a data management method according to the present invention.

S201, S203, S205, S207, S209, S211, S213‧‧ steps

Claims (24)

A data management method for a data storage device, the data storage device comprising a non-volatile memory, the non-volatile memory comprising a plurality of data pages, each of the data pages for storing a plurality of data, the steps comprising Receiving a read command; when a target data of the read command is stored in a data temporary storage device, the target data is read from the data temporary storage device; and a remaining data of the temporary storage device is determined Whether the amount of data is greater than a threshold value, wherein the remaining data is part of a follow-up data and the target data has a relationship with the remaining data in reading the data; and when the judgment is negative, at least the target data is The data of a subsequent data page is stored in the temporary storage device of the data. The data management method according to Item 1, comprising the steps of: if the target data of the read command is not stored in the data temporary storage device, reading at least one of the target data from the non-volatile memory The data pages; and storing the subsequent data of the at least one of the data pages to the temporary storage device. The data management method according to Item 1, comprising the steps of: if the target data of the read command is not stored in the data temporary storage device, reading at least one of the target data from the non-volatile memory The data pages; and storing the target data of the at least one of the data pages and the subsequent data to the temporary storage device of the data. The data management method according to Item 1, wherein the threshold value is smaller than the capacity of the data page. The data management method according to Item 1, wherein the data amount is a difference between a maximum address value and a minimum address value of the remaining data. The data management method according to Item 1, wherein the subsequent data minus the target data is equal to the remaining data. A data management method for a data storage device, the data storage device comprising a non-volatile memory, the non-volatile memory comprising a plurality of data pages, each of the data pages for storing a plurality of data, the steps comprising Receiving a read command; reading a target data by a data temporary storage device according to the read command; determining whether a data amount of a remaining data of the data temporary storage device is greater than a threshold value, wherein the remaining data is And a part of the follow-up data and the relationship between the target data and the remaining data in the data reading; and when the determination is no, the data of the at least one subsequent data page of the target data is recorded to the temporary storage device. The data management method of claim 7, the method comprising: reading, by the non-volatile memory, at least one of the data pages including the target data according to the read command; and recording the at least one of the data pages Follow-up information to the temporary storage device of the data. The data management method of claim 7, the method comprising: reading, by the non-volatile memory, at least one of the data pages including the target data according to the read command; and recording the at least one of the data pages Target data and the follow-up information to the temporary storage device of the data. The data management method of item 7, wherein the threshold is less than the capacity of the data page. The data management method according to Item 7, wherein the data amount is a difference between a maximum address value and a minimum address value of the remaining data. The data management method of item 7, wherein the subsequent data minus the target data is equal to the remaining data. A data storage device for a data management method, comprising: a non-volatile memory, comprising a plurality of data pages, each of the data pages for storing a plurality of data; a temporary storage device for storing the data And a memory controller electrically coupled to the non-volatile memory and the data temporary storage device, wherein the memory controller is configured to receive a read command and use the data according to the read command The temporary storage device reads a target data, and the memory controller determines whether a data amount of a remaining data of the temporary storage device is greater than a threshold value, wherein the remaining data is part of a subsequent data and the target The data has a relationship with the remaining data in the data reading. When the determination is no, the memory controller stores the data of the at least one subsequent data page of the target data to the temporary storage device. The data storage device of claim 13, wherein the memory controller reads at least one of the data pages including the target data from the non-volatile memory according to the read command, and at least one of the data The subsequent data of the page is stored to the temporary storage device of the data. The data storage device of claim 13, wherein the memory controller reads at least one of the data pages including the target data from the non-volatile memory according to the read command, and at least one of the data The target data of the page and the subsequent data are stored to the temporary storage device of the data. The data storage device of item 13, wherein the threshold value is less than the capacity of the data page. The data storage device of item 13, wherein the data amount is a difference between a maximum address value and a minimum address value of the remaining data. The data storage device of item 13, wherein the subsequent data minus the target data is equal to the remaining data. A memory controller for a data management method, comprising: a first communication interface for communicating with a non-volatile memory to access the non-volatile memory; a second communication interface for Data temporary storage device communication to access the data temporary storage device; a third communication interface for communicating with a host to receive a read command from the host; and a microprocessor, and the first communication interface, The second communication interface is electrically coupled to the third communication interface, and the microprocessor is configured to read a target data from the data temporary storage device according to the read command, and the microprocessor determines the temporary storage device for the data. Whether the amount of data of a remaining data is greater than a threshold value, wherein the remaining data is part of a subsequent data and the target data has a relationship with the remaining data in the data reading, when the microprocessor determines If not, the microprocessor records the data of the at least one subsequent data page of the target data to the temporary storage device of the data. The memory controller of claim 19, wherein the microprocessor is configured to read, by the non-volatile memory, at least one of the data pages including the target data and record at least one of the data according to the read command. The subsequent information of the page is to the temporary storage device of the data. The memory controller of claim 19, wherein the microprocessor reads at least one of the data pages including the target data from the non-volatile memory according to the read command and records at least one of the data pages The target information and the follow-up information to the temporary storage device of the data. The memory controller of claim 19, wherein the threshold is less than the capacity of the data page. The memory controller of claim 19, wherein the amount of data is a difference between a maximum address value and a minimum address value of the remaining data. The memory controller of claim 19, wherein the subsequent data minus the target data is equal to the remaining data.