7.8. THE ELECTRICAL INTERFACE
It is beyond the scope of this book to present the details of the Serial RapidIO electrical interface. This section will present a brief overview of the techniques used to connect Serial RapidIO devices together and to achieve the extremely high signaling rates of Serial RapidIO. The 1x and 4x links are electrically identical, except for the use of more lanes in the 4x link. Figure 7.24 shows the signal interface diagram connecting two 1x devices together with the RapidIO serial interconnect.
Figure 7.25 shows the signal interface diagram connecting two 4x devices together with the RapidIO serial interconnect.
Figure 7.26 shows the connections that would be active between a 4x serial device and a 1x serial device.
Figure 7.24. RapidIO 1x device to 1x device interface diagram
Figure 7.25. RapidIO 4x device to 4x device interface diagram
Figure 7.26. RapidIO 4x device to 1x device interface diagram
The RapidIO specification defines two sets of transmitter electrical specifications (short-run and long-run) and a single receiver specification for each of three baud rates, 1.25, 2.50, and 3.125 Giga baud persecond.
Two transmitter specifications allow ...
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