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82563EB/82564EB LAN on Motherboard Design Guide
6.0 Oscillator Support..........................................................................................................23
6.1 Oscillator Solution...............................................................................................24
6.1.1 High Voltage Solution (VDD = 3.3V)......................................................24
7.0 Ethernet Component Layout Guidelines .....................................................................25
7.1 Layout Considerations for the 82563EB/
82564EB Ethernet Platform LAN Connect Devices............................................25
7.1.1 Guidelines for Component Placement....................................................25
7.1.2 Crystals and Oscillators..........................................................................26
7.1.3 Board Stack Up Recommendations.......................................................27
7.1.4 Differential Pair Trace Routing for 10/100/1000 Designs.......................27
7.1.4.1 Signal Termination and Coupling..............................................27
7.1.5 Signal Trace Geometry for 1000 BASE-T Designs................................27
7.1.6 Trace Length and Symmetry for 1000 BASE-T Designs........................28
7.1.7 Trace Routing, Geometry and Length for the Kumeran interface ..........28
7.1.7.1 Signal Termination and Coupling..............................................29
7.1.8 Impedance Discontinuities .....................................................................30
7.1.9 Reducing Circuit Inductance ..................................................................30
7.1.10 Signal Isolation.......................................................................................30
7.1.11 Power and Ground Planes.....................................................................30
7.1.12 Traces for Decoupling Capacitors..........................................................31
7.1.13 Ground Planes Under a
Magnetics Module (Copper-Based Gigabit designs)..............................32
7.1.14 Light Emitting Diodes for
Designs Based on 82563EB/82564EB Device ......................................34
7.1.15 Thermal Design Considerations.............................................................34
7.2 Physical Layer Conformance Testing .................................................................34
7.2.1 Conformance Tests for 10/100/1000 Mbps Designs..............................35
7.3 Troubleshooting Common Physical Layout Issues .............................................35
8.0 82563EB/82564EB Exposed Pad*.................................................................................37
8.1 Introduction .........................................................................................................37
8.2 Component Pad, Solder Mask and Solder Paste................................................38
8.3 Landing Pattern A (No Via In Pad)......................................................................40
8.4 Landing Pattern B (Thermal Relief; No Via In Pad) ............................................41
8.5 Landing Pattern C (Via in Pad) ...........................................................................42
9.0 Bill of Materials (BOM)...................................................................................................43
10.0 Design, Layout, and Test Checklists............................................................................45
10.1 Schematic Checklist............................................................................................45
10.2 Board Layout and Placement Checklist ..............................................................50
10.3 Validation Checklist.............................................................................................54
11.0 Reference Schematic.....................................................................................................55
12.0 System Manageability....................................................................................................57
A Measuring LAN Reference Frequency Using a Frequency Counter .........................59
A.1 Background.........................................................................................................59
A.2 Required Test Equipment ...................................................................................59
A.3 Indirect Probing Method......................................................................................59