The Giga MAC IP is an embedded Fast Ethernet controller module. It is compliant with IEEE 802.3 specification for 10/100Mbps Ethernet and the IEEE802.3ab specification for 1000Mbps Ethernet MAC. The integrated checksum offload engines enable the automatic generation TCP Level checksum for received and transmitted Ethernet Frame, support TCP segmentation and UDP fragment to offload the task from the CPU for Linux OS applications. By using a 32-bit CPU local bus and memory local bus, it provides a standard interface to the host CPU. The Ethernet Controller interfaces to the IEEE Std 802.3u MII interface as well as RMII interface, to the IEEE Std 802.3ab RGMII interface, and also support IEEE 802.3x full-duplex flow control.