Memory controller, memory system, and access control method of flash memory

A method of controlling access to a flash memory in which a memory controller controls access to a flash memory in which data is written in a page size unit according to data-write request information, the method comprising:

• the memory controller acquiring write data to be written into the flash memory according to the data-write request information;
• the memory controller adding dummy data to the write data by referring to instruction information about a descriptor transfer of the write data if a size of the write data to be written according to the data-write request information does not match the page size unit and adjusting the size of the write data to the page size unit;
• and
• the memory controller outputting the write data by referring the instruction information.