The GPHY is a fully integrated single chip for Gigabit Ethernet applications with lowest power consumption. It is capable of functioning in 10BASE-T, 100BASE-TX, and 1000BASE-T. This GPHY links the GMII-based Media Access Control Layer (MAC) (Giga Media Independent Interface). This GPHY uses either RGMII or GMII to connect 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 all of the physical layer functionality of 100BASE-TX described by IEEE802.3u and 1000BASE-T defined by IEEE802.3ab, including the Physical Coding Sub-layer (PCS), Physical Medium Attachment Layer (PMA), and Twisted Pair Physical Medium Dependent Sub-layer (TP-PMD, 100BASE-TX only).