Intel 82562EX, Руководство по конструкции

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82540EP/82541(PI/GI/EI) & 82562EZ(EX) Dual Footprint Design Guide
1
1.0 Introduction
Intel currently supports several footprint compatible Ethernet options depending upon the target
application. The term “footprint compatible” means that the silicon devices are all manufactured in
a 15 mm x 15 mm, 196-ball grid array package with the same ball pattern. Many of the critical
signal pin locations are identical, allowing designers to create a single LAN on Motherboard
(LOM) design that accommodates all devices. This is a flexible, cost-effective, multipurpose
design technique that allowing maximized value while matching performance needs.
Note: Since some of the signal pins have different usages, the term “pin-compatible” is not applicable.
Available LAN components with the same footprint include the 82540EP/82541xx Family of
Gigabit Ethernet Controllers and the 82562EZ(EX) Platform LAN Connect components.
Note: Throughout this document, the notation “82541xx” will be used to denote the 82541 Family of
Gigabit Controllers (82541PI, 82541GI, and 82541EI).
The LAN component used on a specific platform depends on the end user’s need for connection
speed and manageability. As the requirements change, footprint compatibility makes it possible to
re-focus the platform without the need to redesign a new a motherboard.
1.1 Scope
This application note contains Ethernet design guidelines applicable to LOM designs based on the
Intel
®
865 Chipset and Intel
®
875 Chipset. The document identifies similarities and differences
between the 82562EZ(EX) Platform LAN Connect device and the 82540EP/82541xx Gigabit
Ethernet Controller.
•
Section 2 describes the port interfaces specific to each device.
•
Section 3 explains the requirements for connecting an Ethernet device to the system.
•
Section 4 describes board layout techniques applicable to these devices.
•
Section 5 provides a reference to the design and layout checklists.
Table 1. LAN Component Connections/Features
LAN Component Interface Connection Features
82541xx PCI Gigabit Ethernet (1000BASE-T)
with Alert Standard Format
(ASF) alerting Gigabit Ethernet, ASF 2.0
alerting
82562EX (196 BGA) LCI 10/100 Ethernet with ASF
alerting Ethernet 10/100
connection, ASF 1.0
alerting
82562EZ (196 BGA) LCI Basic 10/100 Ethernet Ethernet 10/100
connection
82540EP PCI Gigabit Ethernet (1000BASE-T)
with ASF alerting Gigabit Ethernet, ASF 1.0
alerting