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MCF54415 USB Clock setting

Question asked by Nitin Kothari on Apr 4, 2014
Latest reply on Apr 10, 2014 by Kan_Li



I am using MCF54415 custom built board with MQX and intend to use USB OTG on it.


However, I am facing USB clock setting issue. The problem is I cannot change OUTDIV4 bits in PLL Divider Register (PLL_DR).

I can see during dubug, in register PLL_DR the value is 0x00030460. But when I change it to 0x00070406, it remains the same even after execution of the PLL_DR = 0x00070406 command.

Any hints or suggestions are greatly appreciated.

Thank you for your time.