Expandable Express Card Capable of Isolating Noise and Method for Combining Functionalities of the Express Card with a Non-Host Device

摘要

An express card includes a plurality of detection pins, a plurality of power pins, a plurality of Universal Serial Bus (USB) interface pins, a plurality of Peripheral Component Interconnect Express (PCIE) interface pins, a plurality of expandable pins, and a power detection circuit. The power detection circuit includes a plurality of input terminals coupled to the plurality of power pins respectively, a power output terminal for providing the card power, and a control terminal for providing a control signal for enabling or disabling the plurality of expandable pins according to the detection result of the power detection circuit.