Electronic apparatus and data storage method capable of reducing the number of storage portions connectable to logic circuit

A data storage method executed by an electronic apparatus including a logic circuit whose internal configuration is reconfigurable based on configuration data corresponding to one or more functions, a plurality of first storage portions provided so as to be connectable to the logic circuit and configured to separately store a plurality of items of the configuration data having different corresponding functions or combinations of functions, and a switching portion capable of switching a connection target connected to the logic circuit between the plurality of first storage portions, the data storage method comprising:

• an acquisition step of acquiring the configuration data from a second storage portion different from the first storage portions;
• and
• a storage step of storing, in a first storage portion not connected to the logic circuit among the first storage portions, the configuration data acquired by the acquisition step, instead of the configuration data stored in the first storage portion.