Multiple Core Instances with the MII - 9.0 English

Tri-Mode Ethernet MAC LogiCORE IP Product Guide (PG051)

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9.0 English

Because both mii_tx_clk and mii_rx_clk are sourced by the external PHY device connected to the MII, it is not possible to share transmitter or receiver clock resources across multiple instantiations of the core. Each instance of the core requires its own independent clocking resources. Therefore, the logic of the following figure must be duplicated for each instance of the core.

Figure 1. MII Transceiver, Receiver and Clock Logic for UltraScale Devices