@jrsharp: Since we have not done a final synthesis on the SoC core processor, I don't know what the external clock will be yet. However, based on the architecture, which is very similar to other chips we have done recently, I would guess that it would run at a rate of about 60-80MHz. It occurs to me now that I should probably provide a secondary clock on an independent divider, since the user area may want a clock running at a different rate from the core processor.