Specifications

Dual Port GbE I/O Module (AXXGBIOMOD) Intel

I/O Expansion Modules

Figure 4. Dual Gb Ethernet I/O Module Dimensions; Bottom View

2.4 Intel

82571EB Gb Ethernet Controller

The Intel

82571EB Gb Ethernet Controller is a single, compact component with two fully

integrated Gb Ethernet Media Access Control (MAC) and physical layer (PHY) ports. This

device uses the PCI Express* architecture (Rev. 1.0a) and also enables a dual-port Gb Ethernet

implementation. The Intel

82571EB Gb Ethernet Controller provides two IEEE 802.3 Ethernet

interfaces for 1000BASE-T, 100BASE-TX, and 10BASE-T applications. Both ports also

integrate a Serializer-Deserializer (SerDes) to support 1000BASE-SX or 1000BASE-LX (optical

fiber) and Gb 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 Intel

82571EB Gb Ethernet Controller for PCI Express* is designed for high-performance

and low memory latency. The device is optimized to connect to a system Memory Control Hub

(MCH) using up to four PCI Express* lanes. Wide internal data paths eliminate performance

bottlenecks by efficiently handling large address and data words. Combining parallel and

pipelined logic architecture optimized for Gb Ethernet and for independent transmit and receive

queues, the controller efficiently handles packets with minimum latency. The controller includes

advanced interrupt-handling features and 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. Using hardware acceleration, the controller offloads tasks from

Revision 1.2

Intel order number: D44901-008