Read Transaction - 16.2 English

1G/2.5G Ethernet PCS/PMA or SGMII LogiCORE IP Product Guide (PG047)

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16.2 English

The following figure shows a read transaction, defined as OP= 10. The addressed PHY device (with physical address PHYAD) takes control of the MDIO wire during the turnaround cycle and then returns the 16-bit word from the register at REGAD.

Figure 1. MDIO Read Transaction