The GPHY is a fully integrated IP Core with low power consumption for Giga 10/100/1000 Ethernet applications. It can operate in 10BASE-T, 100BASE-TX, and 1000BASE-T protocols. By using GMII (Giga Media Independent Interface), this GPHY links to the Media Access Control Layer (MAC). By using RGMII or GMII (Giga Media Independent Interface), this GPHY interfaces to the Media Access Control Layer (MAC). It could support UTP5/UTP3 cable for 10BASE-Te Ethernet or Unshielded Twisted Pair Category 5 Cable (UTP5) for 100BASE-TX Fast Ethernet and 1000BASE-T Giga Ethernet. It includes the Physical Coding Sub-layer (PCS), Physical Medium Attachment Layer (PMA), and Twisted Pair Physical Medium Dependent Sub-layer (TP-PMD, 100BASE- TX only) as well as all of the physical layer functionality for 1000BASET as described by IEEE 802.3ab and 100BASE-TX, respectively.