Controlling method of a memory card

A memory system being connectable to a host device and an external device other than the host device, the system comprising:

• a host interface to connect to the host device;
• a wireless network interface to connect to the external device;
• a nonvolatile memory which can store data from the host device and the external device;
• a controller which controls the nonvolatile memory to write and read data in response to a request from the host device via the host interface;
• a wireless communication circuit configured to transmit data stored in the nonvolatile memory to the external device or to receive data from the external device via the wireless network interface with a wireless communication;
• and
• a first register,
• wherein the controller is configured to process a first command to read data from the first register, and process a second command to write data to the first register,
• wherein information indicating a number of two or more functions is stored in the first register,
• wherein the first register includes a first address region to which a first function of the wireless communication is assigned and a second address region to which a second function of the wireless communication is assigned, the second address region being different from the first address region,
• the first function is a function of searching for a wireless LAN to which the memory system can be connected, and
• the second function is a function of setting an SSID name and passphrase.