Universal serial bus compatible peripheral device and universal serial bus controller which automatically switches between connection and disconnection of computer

A universal serial bus (USB) controller connected to a port according to a USB standard provided for a main unit of a computer, transmits and receives data wirelessly to/from a plurality of various devices, controls data from each of said devices and transmits the data to said computer main unit, said USB controller comprising:

• a receiving unit to receive signals from said devices;
• a transmitting unit to transmit a confirmation signal;
• a control unit to control said receiving unit and said transmitting unit;
• and
• a switch disposed between the computer main unit and the transmitting unit, devices being recognized after switching of said switch, said switch switched on the basis of said confirmation signal and controlling a connection between the computer main unit and the control unit in accordance with a change in a number of the plurality of devices.