Method for performing access control in a memory device, associated memory device and controller thereof

A memory device, comprising:

• a non-volatile (NV) memory, arranged to store information, wherein the NV memory comprises at least one NV memory element;
• and
• a controller, coupled to the NV memory, the controller arranged to control at least one operation of the memory device, wherein the controller comprises:
• a control logic circuit, coupled to the NV memory, the control logic circuit arranged to control the NV memory, wherein the control logic circuit comprises:
• a redundant array of independent disks (RAID) engine circuit, arranged to perform data protection;
• and
• a memory, arranged to provide storage space for the RAID engine circuit, wherein the memory is a volatile memory;
• and
• a processing circuit, coupled to the control logic circuit, the processing circuit arranged to control the controller according to a command from a host device, allowing the host device to access the NV memory via the controller, wherein under control of the processing circuit, the controller performs the following operations:
• according to at least one predetermined arrangement pattern, writing a plurality of sets of symbols into a plurality of storage regions of the memory as a plurality of RAID groups, respectively, in order to provide data protection for accessing the NV memory;
• utilizing the RAID engine circuit to determine a series of reading patterns corresponding to the at least one predetermined arrangement pattern;
• according to a reading pattern of the series of reading patterns, utilizing the RAID engine circuit to read a plurality of symbols from each RAID group of the RAID groups, wherein the reading pattern indicates respective reading locations of multiple subsets of a group of symbols among multiple groups of symbols for a reading cycle among multiple reading cycles, and a first reading location of a first subset of said multiple subsets and a second reading location of a second subset of said multiple subsets among said respective reading locations of the multiple subsets of the group of symbols for the reading cycle are shifted reading locations of each other;
• and
• utilizing the RAID engine circuit to perform exclusive-OR (XOR) operations on the symbols, in order to convert the symbols into at least one XOR result corresponding to the RAID group, wherein the at least one XOR result is arranged to perform data protection.

A controller of a memory device, the memory device comprising the controller and a non-volatile (NV) memory, the NV memory comprising at least one NV memory element, and the controller comprising:

• a control logic circuit, coupled to the NV memory, the control logic circuit arranged to control the NV memory, wherein the control logic circuit comprises:
• a redundant array of independent disks (RAID) engine circuit, arranged to perform data protection;
• and
• a memory, arranged to provide storage space for the RAID engine circuit, wherein the memory is a volatile memory;
• and
• a processing circuit, coupled to the control logic circuit, according to a command from a host device, the processing circuit arranged to control the controller in order to allow the host device to access the NV memory via the controller, wherein under control of the processing circuit, the controller performs the following operations:
• according to at least one predetermined arrangement pattern, writing a plurality of sets of symbols into a plurality of storage regions of the memory as a plurality of RAID groups, respectively, in order to provide data protection on the NV memory;
• utilizing the RAID engine circuit to determine a series of reading patterns corresponding to the at least one predetermined arrangement pattern;
• according to a reading pattern of the series of reading patterns, utilizing the RAID engine circuit to read a plurality of symbols from each RAID group of the RAID groups, wherein the reading pattern indicates respective reading locations of multiple subsets of a group of symbols among multiple groups of symbols for a reading cycle among multiple reading cycles, and a first reading location of a first subset of said multiple subsets and a second reading location of a second subset of said multiple subsets among said respective reading locations of the multiple subsets of the group of symbols for the reading cycle are shifted reading locations of each other;
• and
• utilizing the RAID engine circuit to perform exclusive-OR (XOR) operations on the symbols, in order to convert the symbols into at least one XOR result corresponding to the RAID group, wherein the at least one XOR result is arranged to perform data protection.