The last year has seen significant proliferation of the
RapidIO standard and associated interface circuitry.
RapidIO is intended to provide a standard for interprocessor
communication as well as board-to-board
communications. Two variants are available: Serial
RapidIO and Parallel RapidIO. The designer is free to
choose either implementation but the choice is often
made based on the distance between communicating
devices. The Serial RapidIO implementation uses an
802.3 XAUI like transceiver in either a short run or a
long run configuration. The long run configuration is
essential for board-to-board communication. The Parallel