Receive Path - 4.1 English

GMII to RGMII Product Guide (PG160)

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4.1 English

Measured from a data octet input into rgmii_rxd[3:0] of the receiver side of the RGMII interface until that data appears on the gmii_rxd[7:0] on the GMII interface, the latency through the core through the receive direction is one clock period of rgmii_rx_clk, plus the additional delay equal to the fixed delay specified on the IDELAY component.