The Signal Groups
As illustrated in Figure 3-1 on page 54, the high-speed HyperTransport signals on each link consist of an outbound (transmit) set of signals and an inbound (receive) set of signals for each device; these are routed point-to-point. Having two sets of uni-directional signals allows concurrent traffic. In addition, there is one set of low speed signals that may be bused to multiple devices.
Figure 3-1. HyperTransport Signal Groups
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