Memory controller and data processing method

The invention relates to a memory controller and a data processing method. The method comprises the following steps of: reading the memory device in response to a read instruction so as to respectively read a plurality of parts included in set data; writing the read parts into a buffer memory to complete data transmission of the parts of the set data; in response to completion of data transmission of each part of the set data, sequentially providing access information corresponding to each part; obtaining access information of the set data and correspondingly generating a plurality of descriptors according to the time sequence of obtaining the access information; receiving and temporarily storing the descriptors; sequentially selecting a latest descriptor from the descriptor pool according to the tag value and providing the latest descriptor for the direct memory access engine; and reading, by the direct memory access engine, the buffer memory according to the latest descriptor to obtain at least a portion of