Memory controller, memory system and memory control method

A memory system comprising:

• a non-volatile memory;
• a first volatile memory that temporarily stores therein data received from outside of the memory system;
• a second volatile memory that stores therein first correspondence information representing association between a logical address of data that are transferred to a non-volatile memory and a physical address of the non-volatile memory in which the transferred data are stored;
• and
• a controller that
• controls the temporarily stored data to be transferred from the first volatile memory to the non-volatile memory,
• stores the first correspondence information of the transferred data into the second volatile memory, and
• updates second correspondence information stored in the non-volatile memory based on the first correspondence information stored in the second volatile memory by using the first volatile memory as a work area after the data is transferred from the first volatile memory to the non-volatile memory, the second correspondence information representing association between a logical address of the data that are stored in the non-volatile memory and a physical address of the non-volatile memory in which the data are stored.

A memory control method of a memory system including a first volatile memory and a non-volatile memory, the method comprising:

• temporarily storing data received from outside of the memory system in the first volatile memory;
• transferring the data acquired from outside from the first volatile memory to a non-volatile memory for storage;
• storing first correspondence information of the transferred data into a second volatile memory, the first correspondence information representing association between a logical address of data that are transferred to the non-volatile memory and a physical address of the non-volatile memory in which the transferred data are stored;
• and
• updating second correspondence information stored in the non-volatile memory based on the first correspondence information stored in the second volatile memory by using the first volatile memory as a work area after the data is transferred from the first volatile memory to the non-volatile memory, the second correspondence information representing association between a logical address of the data that are stored in the non-volatile memory and a physical address of the non-volatile memory in which the data are stored.