WG82578DM S LGY6 Intel, WG82578DM S LGY6 Datasheet - Page 8
WG82578DM S LGY6
Manufacturer Part Number
WG82578DM S LGY6
Description
Manufacturer
Intel
Datasheet
1.WG82578DM_S_LGY6.pdf
(187 pages)
Specifications of WG82578DM S LGY6
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1
Introduction
Scope
This document describes the external architecture for the 82578. 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
82578.
Overview
The 82578 is a single port Gigabit Ethernet Physical Layer Transceiver (PHY). It
connects to the Intel
(MAC) through a dedicated interconnect. The 82578 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 82578 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 82578 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 82578 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 82578’s PCIe-based interface.
®
5 Series Express Chipset integrated Media Access Controller
82578 GbE PHY—Introduction
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