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==Introduction==
SBC Lynx can be used either as a standalone board or as a part of a bigger system. From the point of view of overall system grounding, requirements may differ significantly depending on the actual usage. For this reason , SBC Lynx implements a flexible grounding scheme that can be adjusted to the majority of application environments.
The following image shows the generic organization of ground domains.
Basically , there are three main domains:
*common ground (green area in the picture): all of the digital/analog signals and power supply voltages are referred to this ground
*AC ground (light blue area): it is implemented as a guard ring along the boundary of the board
*connector shields (grey gray areas): several connectors having a metal chassis and that are located along the edges of the board have a metal chassis.
This document describes the most common configurations that differ depending on how these domains are connected to each other. In case you need a configuration that is not listed here, please contact [mailto:sales@dave.eu Sales department].
==Unified ground==
In this configuration all of the three main domains are DC-connected together. This the typical configuration that is used when no earth ground connections are available.
