Abstract: A memory card having a plurality of different interfaces is disclosed. The memory card comprises a function module, a controller coupled to the function module for accessing, a first buffer coupled to the controller for sending a first control signal, and a second buffer coupled to the controller for sending a second control signal. The memory card activates one interface for detecting a first voltage level of the first buffer when the memory card is inserted into a first card reader, and the first buffer is activated to send the first control signal if the detection is positive. Alternatively, the memory card activates the other interface for detecting a second voltage level of the second buffer when the memory card is inserted into a second card reader, and the second buffer is activated to send the second control signal if the detection is positive.

Abstract: A portable USB device built with rechargeable functional apparatus is disclosed. The portable USB device has a USB connector for being inserted into a socket of a host device. A USB device module is powered by the +5V pin on the USB connector and activated to perform data exchange via the D+ and D? pins on the USB connector when the USB connector is coupled to the host device, so as to provide a first specific function to the host device. A charge circuit charges the rechargeable battery via the +5V pin when the USB connector is coupled to the host device. A functional apparatus is powered by the rechargeable battery so as to provide second specific function different from the first one when the USB connector is not coupled to the host device.

Abstract: A separable multi-interface I/O card device comprises an I/O bridge and an I/O device. The I/O bridge includes a host interface for coupling to an electronic device, a bridge unit, and a first I/O bus, wherein the bridge unit is adapted to either convert signals from the host interface into signals of the first I/O bus or convert signals from the first I/O bus into signals of the host interface, and supply power from a power pin of the host interface to the first I/O bus. The I/O device includes an I/O functional unit and a second I/O bus mated with and separably coupled to the first I/O bus so as to send power, I/O, data, and control signals from the host interface to the I/O functional unit.

Abstract: A memory card having a plurality of different interfaces is disclosed. The memory card comprises a function module, a controller coupled to the function module for accessing, a first buffer coupled to the controller for sending a first control signal, and a second buffer coupled to the controller for sending a second control signal. The memory card activates one interface for detecting a first voltage level of the first buffer when the memory card is inserted into a first card reader, and the first buffer is activated to send the first control signal if the detection is positive. Alternatively, the memory card activates the other interface for detecting a second voltage level of the second buffer when the memory card is inserted into a second card reader, and the second buffer is activated to send the second control signal if the detection is positive.

Abstract: A portable USB device built with rechargeable functional apparatus is disclosed. The portable USB device has a USB connector for being inserted into a socket of a host device. A USB device module is powered by the +5V pin on the USB connector and activated to perform data exchange via the D+ and D− pins on the USB connector when the USB connector is coupled to the host device, so as to provide a first specific function to the host device. A charge circuit charges the rechargeable battery via the +5V pin when the USB connector is coupled to the host device. A functional apparatus is powered by the rechargeable battery so as to provide second specific function different from the first one when the USB connector is not coupled to the host device.

Abstract: There is provided an electronic card with extending pins for being inserted into a host. The electronic card has a plurality of front pins for providing standard power supply, data, address and control connections. The electronic further provides and a plurality of extending pins alternatively arranged with the plurality of front pins for providing a plurality of extending functions, wherein at least one extending pin is an identifying pin for enabling the host to identify whether the electronic card has extending pins.