Memory card

1. A memory card comprising:

a nonvolatile semiconductor memory;

a controller configured to control the nonvolatile semiconductor memory;

a memory serving as a work area of the controller;

a wireless communication module having a wireless communication function; and

an extension register to be provided in the memory and including a plurality of pages,

wherein each of the plurality of pages has a data length defining the wireless communication function,

wherein the controller processes a first command to read data from the extension register, and a second command to write data to the extension register, and the extension register records,

an information specifying the type of the wireless communication function in a specific page, and

an address information indicating a region on the extension register to which the wireless communication function is assigned, and

wherein the extension register, to which the wireless communication function is assigned, comprises:

a first register which indicates the wireless communication function to support;

a second register for writing a third command to perform a wireless communication;

a third register for reading a processing state of the third command; and

a fourth register for reading an execution result of the third command.

2. The card according to claim 1 , wherein

the first command is a command to read data from the extension register in unit of a page, and

the second command is a command to write data to the extension register in a unit of a page.

3. The card according to claim 1 , wherein the first command, the second command, and the third command include a register select indicating a page in the extension register and offset indicating a position of data in the selected page.

4. The card according to claim 1 , wherein the first command, the second command, and the third command include an information indicating the data length.

5. The card according to claim 1 , wherein

the extension register includes a data port for writing the third command and an argument.

6. The card according to claim 1 , wherein the extension register includes a data port for acquiring a response as an execution result of the third command.

7. A memory card connectable to a host device, the card having one or more wireless communication functions, the card comprising:

a nonvolatile semiconductor memory;

a controller configured to control the nonvolatile semiconductor memory in response to a request from a host device;

a memory serving as a work area of the controller; and

an extension register to be provided in the memory and including a plurality of pages,

wherein the controller processes a first command to read data from the extension register, and a second command to write data to the extension register,

wherein a specific page of the extension register stores information indicating number of the one or more wireless communication functions,

wherein the extension register includes a first address region to which the wireless communication function is assigned,

wherein the first address region stores:

first information to find a driver of the host device which can be used to control the wireless communication function; and

second information indicating a second address region of the extension register to which the wireless communication function is assigned, and

wherein the first address region and the second address region are located at different pages of the extension register.