I'm currently doing small design with CM408F. I saw on schematic that components are connected to 2 ground planes. Will I get any problems(noise?) if I put everything on one ground plane? (I took uC,JTG,USB,XTAL,both VREGs).
There is not a 2 ground plane requirement. I can not say 1 ground plane will not cause a problem or say 2 ground planes will not.To get maximum performance I would recommend 2 ground planes.
For precision analog processing having 2 ground planes is common, with isolation and filtering between the 2 ground planes.
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