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Intel® 82575EB Gigabit Ethernet Controller: DatasheetThe Intel® 82575EB Gigabit Ethernet Controller is a single, compact component with two fully integrated Gigabit Ethernet Media Access Control (MAC) and physical layer (PHY) ports. The device uses the PCI Express Base Specification, Rev.1.1RD. The 82575EB provides a standard IEEE 802.3 Ethernet interface for 1000BASE-T, 100BASE-TX, and 10BASE-T applications (802.3z, 802.3u, and 802.3ab). Ports also contain a Serializer-Deserializer (SERDES) to support 1000Base-SX/LX (optical fiber) and Gigabit backplane applications. In addition to managing MAC and PHY Ethernet layer functions, the controller manages PCI Express packet traffic across its transaction, link, and physical/logical layers. The SERDES can be used in SGMII mode to connect to external PHY, either on-board or via the SFP connector. The Intel 82575EB’s on-board System Management Bus (SMB) ports enable network manageability implementations required by information technology personnel for remote control and alerting via the LAN. With SMB, management packets can be routed to or from a management processor. Enhanced pass-through capabilities also allow system remote control over standardized interfaces. Also included is a new manageability interface, NC-SI that supports the DMTF preOS sideband protocol. An internal management interface called MDIO enables the MAC (and software) to monitor and control the PHY. Both ports support the Wake on LAN feature.The 82575EB with PCI Express architecture is designed for high performance and low memory latency. The device is optimized to connect to a system Memory Control Hub (MCH) using four PCI Express lanes. Alternatively, the 82575EB can connect to an I/O Control Hub that has a PCI Express interface.Wide internal data paths eliminate performance bottlenecks by efficiently handling large address and data words. Combining a parallel and pipe-lined logic architecture optimized for Gigabit Ethernet and independent transmit and receive queues, the 82575EB efficiently handles packets with minimum latency. The 82575EB includes advanced interrupt handling features, including MSI-X support. The 82575EB uses efficient ring buffer descriptor data structures, with up to 64-packet descriptors cached on chip. A large 48 KByte per port on-chip packet buffer maintains superior performance. In addition, using hardware acceleration, the controller offloads tasks from the host, such as TCP/UDP/IP checksum calculations and TCP segmentation.Read the full Intel® 82575EB Gigabit Ethernet Controller Datasheet.
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