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AM335x crystal

Mark Norman
Prodigy 235 points

Hi,

I am trying to specify the crystal to be used in our AM335x design.  I would like to use a 25MHz crystal used elsewhere in the design.  This crystal has a shunt capacitance of 7pf (http://foxonline.com/pdfs/fqa.pdf).  The AM335x datasheet specifies the maximum acceptable crystal shunt capacitance is 5pF (sprs717c, Table 4-1).

I noticed in a similar forum question that the spec could be relaxed to allow the 7pF crystal (http://e2e.ti.com/support/dsp/davinci_digital_media_processors/f/716/t/103408.aspx).  Is that possible for the AM335x?  If not is there another crystal you could recommend?

Kind Regards

Mark