Table of Contents
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Contents
1 Introduction .............................................................................................. ７
1.1 About This Document ........................................................................... ７
1.2 Acronyms / Definitions .......................................................................... ７
1.3 Reference Documents .......................................................................... １１
1.4 Revision History .................................................................................... １１
1.5 SOM-5992 Block Diagram .................................................................... １２
1.6 Module Pin-out Types 7 - Required and Optional Features ................. １３
2 COM Express Type 7 Interfaces .............................................................. １５
2.1 COM Express Type 7 Connector Layout .............................................. １５
2.2 COM Express Type 7 Connector Pin-out.............................................. １６
2.3 General Purpose PCI Express Lanes ................................................... ２４
2.3.1 General Purpose PCIe Signal Definitions ........................................................ ２４
2.3.2 PCI Express Lane Configurations - SOM-5992 Type 7 Limitations ................ ３４
2.3.3 PCI Express General Routing Guidelines ........................................................ ３６
2.3.3.1 PCI Express Insertion Loss Budget with Slot Card ............................... ３６
2.3.4 PCI Express Trace Length Guidelines ............................................................. ４０
2.4 NC-SI .................................................................................................... ４２
2.4.1 NC-SI Signal Definitions .................................................................................. ４２
2.4.2 NC-SI General Routing Guidelines .................................................................. ４３
2.4.3 NC-SI Trace Length Guidelines ....................................................................... ４３
2.5 10GB Ethernet ...................................................................................... ４４
2.5.1 10GB LAN Signal Definitions ........................................................................... ４５
2.5.2 Example 10 GB Ethernet Designs ................................................................... ５３
2.5.2.1 2016 Silicon 10GbE Fiber Implementation ........................................... ５３
2.5.2.2 2016 Silicon 10GbE Copper Implementation........................................ ５４
2.5.2.3 Future Silicon 10GbE Fiber Implementation ......................................... ５５
2.5.2.4 Future Silicon 10GbE Copper Implementation ..................................... ５６
2.5.3 AC Coupling of 10G_KR_TX Signals ............................................................... ５７
2.5.4 10GB LAN Routing Guidelines ........................................................................ ５８
2.5.4.1 10GB LAN KR Guidelines .................................................................... ５９
2.5.4.2 10GB LAN Sideban Guidelines ............................................................ ６０
2.6 Gb Ethernet ........................................................................................... ６１
2.6.1 Gb Ethernet Signal Definitions ......................................................................... ６１
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Table of Contents
