Patent ID: 8185675

Claim:
An interface system, which is adapted to a portable device, comprising: a control chip, for providing at least a first interface port and a second interface port; a first peripheral device, for storing data; an external interface port, for interfacing the portable device with an external device; a first bus driver having a first input port, a second input port and an output port, for interfacing the first input port and the output port according to a first status of a first control signal, or interfacing the second input port and the output port according to a second status of the first control signal; a second bus driver, electrically connected to the first interface port, the external interface port, and the output port, for interfacing the first interface port and the external interface port according to a first status of a second control signal, or interfacing the output port and the external interface port according to a second status of the second control signal; a third bus driver, electrically connected to the second interface port, the first peripheral device and the second input port, for interfacing the first peripheral device and the second input port according to the first status of the first control signal, or interfacing the second interface port and the first peripheral device according to the second status of the first control signal; and a control unit, for determining a first control signal status and a second control signal status.