5. A method for receiving a user input in a mobile electronic device having a human interface device and a display unit joined with the human interface device, comprising: receiving, by a text input unit comprising a plurality of physical buttons, a text input of a user; receiving, by a pointer location input unit, a user motion on a motion detection area which is formed on a surface of the physical buttons; recognizing, by the pointer location input unit, information related to a pointer location from the user motion on the motion detection area, wherein the pointer location indicates a location of a pointer displayed on the display unit; activating or deactivating, by a first button, a pointer location input mode; and executing, by the first button, at least one function at the pointer location; wherein the first button is provided in an area separate from the text input unit, wherein the first button comprises a capacitive touch sensor which detects a user touch input, the pointer location input mode is temporarily activated while the user touch input is maintained without mechanically pressing the first button, wherein the first button executes the at least one function at the pointer location when the first button is mechanically pressed, wherein the pointer location input mode is permanently activated without maintaining the user touch input while the first button is locked.
5. A method for receiving a user input in a mobile electronic device having a human interface device and a display unit joined with the human interface device, comprising: receiving, by a text input unit comprising a plurality of physical buttons, a text input of a user; receiving, by a pointer location input unit, a user motion on a motion detection area which is formed on a surface of the physical buttons; recognizing, by the pointer location input unit, information related to a pointer location from the user motion on the motion detection area, wherein the pointer location indicates a location of a pointer displayed on the display unit; activating or deactivating, by a first button, a pointer location input mode; and executing, by the first button, at least one function at the pointer location; wherein the first button is provided in an area separate from the text input unit, wherein the first button comprises a capacitive touch sensor which detects a user touch input, the pointer location input mode is temporarily activated while the user touch input is maintained without mechanically pressing the first button, wherein the first button executes the at least one function at the pointer location when the first button is mechanically pressed, wherein the pointer location input mode is permanently activated without maintaining the user touch input while the first button is locked. 8. The method of claim 5 , wherein the receiving the user motion is performed on a plurality of touchpads covering the physical buttons, respectively.