I'm trying to figure out my clocking options for the K60_120 and the documentation is somewhat involved. My application requires an external clock source of which I would like to use a 10, 20, or 40MHz clock. What are my options to generate a 25MHz Ethernet clock (MII mode)? What about USB clock? Can both of these be generated by the MCG, and can I get the 25MHz out to the PHY (what pin on the 144-pin part can I use for CLKOUT)? Does this place any limit on my core clock frequencies?
Does Freescale plan some sort of clock planner application to help sort out the clocking options?