The Nuclei USB PHY IP is UTMI interface compatible and a dedicated circuit for full-function USB 2.0 transceivers. It is a mixed-signal circuit, with the analog part including the transmitting and receiving circuits, level conversion circuits, bus driver circuits, etc., and the digital part including the transmitting and receiving and speed switching control circuits, encoding and decoding circuits, serial-to-parallel and parallel-to-serial conversion circuits, as well as digital CDR circuits, etc.
