A double interface CF card includes a CF interface, a USB interface, a control chip and multiple erasable memories. In particular, the circuit and electric design in the flash memory card contain a CF bus interface circuit and a USB bus interface circuit, both of which are built in the control chip to...http://www.google.fr/patents/US20030212848?utm_source=gb-gplus-shareBrevet US20030212848 - Double interface CF card
