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Change ARM clock frequency.

Josep Bernardo Clari
Prodigy 210 points

Hello

I'm trying to change the operating frequency of 297 MHz microprocessor ((2M / N +1) = 168 / 8) to 216 MHz ((2M / N +1) = 18 / 1).
What I have to do? How to change? I be using the DM365 chip with a 24MHz clock.


Thanks

  • 0
    TI__Mastermind 19985 points

    Hi,

    Do you have the source code for the UBL fo rDM365? If yes, you can refer to file named device.c where we program the registers for the PLL. I would recommend you to follow the exact steps to program the PLL as mentioned in the UBL.

    BTW, the UBL already has the clock settings for DM365 for ARM@297MHz. Why would you want to change it?

    Hope this helps.

     

    Regards,

    Anshuman

    PS: Please mark this post as verified, if you think it has answered your question. Thanks.

  • 0 in reply to Anshuman Saxena
    Prodigy 210 points

    Hi:

    I be trying to change the frequency because I have problems with the GPS that I have on my board.

    I think because at 300 MHz is 5 harmonic of 1.5 GHz, which is the frequency at which the GPS works.

    With this we have problems to get GPS satellite signal, because when the microprocessor operates at full capacity, the noise can take the GPS satellites.

    Any suggestions? Could solve this in some way from software

    Thanks