WG82577LM S LGWR Intel, WG82577LM S LGWR Datasheet - Page 8
WG82577LM S LGWR
Manufacturer Part Number
WG82577LM S LGWR
Description
Manufacturer
Intel
Datasheet
1.WG82577LM_S_LGWR.pdf
(195 pages)
Specifications of WG82577LM S LGWR
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1.0
1.1
1.2
Note:
1
Introduction
Scope
This document describes the external architecture for the 82577. It's intended to be a
reference for software developers of device drivers, board designers, test engineers, or
anyone else who might need specific technical or programming information about the
82577.
Overview
The 82577 is a single port Gigabit Ethernet Physical Layer Transceiver (PHY). It
connects to the Intel
(MAC) through a dedicated interconnect. The 82577 supports operation at 1000/100/
10 Mb/s data rates. The PHY circuitry provides a standard IEEE 802.3 Ethernet
interface for 1000BASE-T, 100BASE-TX, and 10BASE-T applications (802.3, 802.3u,
and 802.3ab).
The 82577 is packaged in a small footprint QFN package. Package size is 6 x 6 mm with
a 0.4 mm lead pitch and a height of 0.85 mm, making it very attractive for small form-
factor platforms.
The 82577 interfaces with its MAC through two interfaces: PCIe-based and SMBus. The
PCIe (main) interface is used for all link speeds when the system is in an active state
(S0) while the SMBus is used only when the system is in a low power state (Sx). In
SMBus mode, the link speed is reduced to 10 Mb/s (dependent on low power options).
The PCIe interface incorporates two aspects: a PCIe SerDes (electrically) and a custom
logic protocol.
The 82577 PCIe interface is not PCIe compliant. It operates at half of the PCI Express*
(PCIe*) Specification v1.1 (2.5 GT/s) speed. In this datasheet the term PCIe-based is
interchangeable with PCIe. There is no design layout differences between normal PCIe
and the 82577’s PCIe-based interface.
®
5 Series Express Chipset integrated Media Access Controller
82577 GbE PHY—Introduction
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