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Changing to CPU operating frequencies for PPC5020

Question asked by Richard Gallow on Apr 30, 2015
Latest reply on May 6, 2015 by Richard Gallow

We are using SBCs with the PPC5020 onboard. In the P5020RM I have been read about a feature of that processor that allow you to change the clk frequencies via software. While I have found a number of documents touting this feature I have not been able to uncover any documents explaining how to implement it. From what I understand I should be able to program the CC1 and CC2 PLLs and select their use for 2 the cores and also setup a divisor 1,2,4 to that clock on each core. I have seen how you can setup these values in the reset control word but I am interested on how to change these settings once the board has booted. All of my internet searching has turned up nothing please help and point me a documentation or examples that explain this feature.

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