Non-volatile memory device and interface configuration method

An interface configuration method in a non-volatile memory device including a plurality of non-volatile memory chips and a non-volatile memory controller equipped with an interface for executing I/O processes of data to and from the non-volatile memory chips,

• the non-volatile memory controller being coupled to the plurality of non-volatile memory chips via a plurality of channels and the interface being provided in correspondence to each of the plurality of the channels, the interface configuration method comprising:
• acquiring higher-level transfer rate information related to a data transfer rate between a higher-level apparatus and the non-volatile memory controller;
• determining transfer rate information related to a transfer rate of the interfaces such that a total transfer rate which is a sum of transfer rates to and from the non-volatile memory chips produced by the respective interfaces corresponding to the plurality of channels should be a transfer rate that equals a higher-level transfer rate corresponding to the higher-level transfer rate information or a transfer rate that approximates the higher-level transfer rate;
• and
• performing a configuration related to a transfer rate on the basis of the determined transfer rate information with respect to each of the interfaces.