emac_mac_dev_s::<anonymous union>::<anonymous struct>::miibusy

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uint32_t miibusy : 1; /*This bit should read logic 0 before writing to PHY Addr Register and PHY data Register.During a PHY register access the software sets this bit to 1'b1 to indicate that a Read or Write access is in progress. PHY data Register is invalid until this bit is cleared by the MAC. Therefore PHY data Register (MII Data) should be kept valid until the MAC clears this bit during a PHY Write operation. Similarly for a read operation the contents of Register 5 are not valid until this bit is cleared. The subsequent read or write operation should happen only after the previous operation is complete. Because there is no acknowledgment from the PHY to MAC after a read or write operation is completed there is no change in the functionality of this bit even when the PHY is not Present.*/

emac_mac_struct.h:72