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You are here: Home / Topics / what happens when peripheral clock changes?

what happens when peripheral clock changes?

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Projects › Projects › what happens when peripheral clock changes?

  • This topic has 4 replies, 3 voices, and was last updated 8 years, 6 months ago by SHAH DISHANT H..
Viewing 5 posts - 1 through 5 (of 5 total)
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  • November 30, 2013 at 11:20 am #2745
    ANJUSHA
    Participant

    hello sir/mam,     if crystal oscillator frequency is 12MHz…………then given  peripheral clock can be 15Mhz, 30Mhz, 60Mhz………..depending on a register APBDIV….in ARM….i want to know….what will be the change on the changing the pheripheral clock..which parameter varies.

    December 2, 2013 at 5:56 am #10690
    AJISH ALFRED
    Participant

    Hi Abiram,

    The CLOCK FREQUENCY parameter of the peripheral varies ans those parameters which are related to the CLOCK FREQUENCY.

    In datasheet it might be given as CPU FREQUENCY or using similar terms!

    Which peripheral of the ARM controller are you talking about?

    February 9, 2014 at 6:09 am #10982
    SHAH DISHANT H.
    Participant

    Hi,

     

    By changing the crystal frequency, the execution speed will vary.

     

    If you are using peripherals on UART, it will nt work as BAUDRATE will be changed. For making it working, you have to change value of MULVAL and DIVVAL of ARM7 accordingly.

     

    All the best.

    February 12, 2014 at 9:46 am #11016
    ANJUSHA
    Participant

    thank you sir. i understand how relations between different clocks like pclk,cclk..in ARM

    February 14, 2014 at 9:30 am #11023
    SHAH DISHANT H.
    Participant

    Ok.

     

    All the best.

     

    For any query, feel fee to contact us.

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