Introduction

The Intel? 82541(PI/GI/EI) Gigabit Ethernet is a single, compact component with an integrated Gigabit Ethernet Media Access Control (MAC) and physical layer (PHY) functions. For desktop, workstation and mobile PC Network designs with critical space constraints, the Intel? 82541(PI/GI/EI) allows for a Gigabit Ethernet implementation in a very small area that is footprint compatible with current generation 10/100 Mbps Fast Ethernet designs.

Product Features

■ PCI Bus

— PCI revision 2.3, 32-bit, 33/66 MHz

— Algorithms that optimally use advanced PCI MWI, MRM, and MRL commands

— CLK_RUN# signal

— 3.3 V (5 V tolerant PCI signaling)

■ MAC Specific

— Low-latency transmit and receive queues

— IEEE 802.3x-compliant flow-control support with software-controllable thresholds

— Caches up to 64 packet descriptors in a single burst

— Programmable host memory receive buffers (256 B to 16 KB) and cache line size (16 B to 256 B)

— Wide, optimized internal data path architecture

— 64 KB configurable Transmit and Receive FIFO buffers

■ PHY Specific

— Integrated for 10/100/1000 Mb/s full- and half-duplex operation

— IEEE 802.3ab Auto-Negotiation and PHY compliance and compatibility

— State-of-the-art DSP architecture implements digital adaptive equalization, echo and cross talk cancellation

— Automatic polarity detection

— Automatic detection of cable lengths and MDI vs. MDI-X cable at all speeds

■ Host Off-Loading

— Transmit and receive IP, TCP, and UDP checksum off-loading capabilities

— Transmit TCP segmentation and advanced packed filtering

— IEEE 802.1Q VLAN tag insertion and stripping and packet filtering for up to 4096 VLAN tags

— Jumbo frame support up to 16 KB

— Intelligent Interrupt generation (multiple packets per interrupt)

■ Manageability

— On-chip SMBus 2.0 port

— ASF 1.0 and 2.0

— Compliance with PCI Power Management v1.1/ACPI v2.0

— Wake on LAN* (WoL) support

— Smart Power Down mode when no signal is detected on the wire

— Power Save mode switches link speed from 1000 Mb/s down to 10 or 100 Mb/s when on battery power

■ Additional Device

— Four programmable LED outputs

— On-chip power regulator control circuitry

— BIOS LAN Disable pin

— JTAG (IEEE 1149.1) Test Access Port built in silicon (3.3 V, 5 V tolerant PCI signaling)