FPGA SYSTEM FOR USB BRIDGE IMPLEMENTATION

摘要

A Field Programmable Gate Array (FPGA) based USB bridge implementation for communication of data between a USB Host and a USB mass storage device overcomes drawbacks known in the art including lack of security due to software based encryption implementation and driver and OS dependency. The USB bridge comprises a Host PHY operating in a Device mode and a Device PHY operating in a Host mode, connected to the USB Host and the USB mass storage device respectively via a bidirectional USB link. The FPGA is connected to each of the Host PHY and the Device PHY via a bidirectional ULPI link respectively. Data from the USB Host is written into the FPGA of the USB bridge through the Host PHY. This data in parallel form is then stored internally and subsequently communicated to the USB mass storage device through the Device PHY over the Device ULPI Interface.