A communication device for a target integrated circuit chip having a digital processor, an on-chip emulator for controlling the digital processor and for collecting operation data from the digital processor for communicating to off-chip circuitry, and a target on-chip universal serial bus interface connected to the on-chip emulator, the communication device including an Ethernet port, an universal serial bus port and a further integrated circuit chip having on-chip universal serial bus interface, the on-chip Ethernet interface being connected to the Ethernet port, the interfaces being connected to the processing circuitry for translating between Ethernet protocol data on an Ethernet bus connected to the Ethernet port and universal serial bus data for the target on-chip universal serial bus interface.