This document defines the functions and electrical characteristics of a High-Speed Parallel Interface between FC-1 (Transmission protocol layer) and FC-0 (Physical layer) devices at 2 125,0 and 1 062,5 MBaud data rates. This document applies in full to systems where the FC-0 and FC-1 layer are implemented as separate devices. For systems where the FC-0 and FC-1 devices are integrated, only the functional characteristics of this document apply.

The High-Speed Parallel Interface is composed of two subinterfaces: Transmit Interface and Receive Interface.