Memory controller and data processing method for processing disordered read-out data

A memory controller, coupled between a host device and a memory device to control access operations of the memory device, comprising:

• a buffer memory;
• a memory interface, coupled to the buffer memory and the memory device and configured to read the memory device in response to a read command, wherein the read command is issued by the host device to read predetermined data, the predetermined data comprises a plurality of portions, different tag values are assigned to different portions of the predetermined data, the memory interface respectively reads the portions of the predetermined data from the memory device and writes the portions of the predetermined data that have been read from the memory device into the buffer memory to complete data transfer of the portions of the predetermined data from the memory device to the buffer memory, and sequentially provides access information corresponding to each portion of the predetermined data to a microprocessor in response to completion of the data transfer of the corresponding portion;
• the microprocessor, configured to obtain the access information of the portions of the predetermined data and accordingly generate a plurality of descriptors in response to the obtaining of the access information, wherein the microprocessor directly generates and outputs the descriptors corresponding to the access information in chronological order of the obtaining of the access information;
• and
• a host interface, coupled to the host device and the buffer memory, and comprising:
• a descriptor pool, configured to receive and buffer the descriptors;
• a routing manager, coupled to the descriptor pool and configured to sequentially select one descriptor from the buffered descriptors as a latest descriptor according to the tag values and provide the latest descriptor to a direct memory access (DMA) engine;
• and
• the DMA engine, coupled to the routing manager and configured to read the buffer memory according to the latest descriptor to obtain at least a portion of the predetermined data.