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CCLK for ADSP-21489 is not manipulated as per PMCTL config in my target board.

Dear Sir,

Please provide me guidance on the above subject, I tried to evaluate the target board with small application code. It is working fine as per application requirement when I port in evaluation board for ADSP-21489. But the same thing is not working on target board. The reason what I found during preliminary check is its not generating the CCLK as per requirement.

please suggest any additional check up to do and guide to sort this problem.

regards

satya

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  • Hi Satya,

    Before I comment regarding the issue I would like to know what kind of application are you trying to run on the target board?

    Also in your code have you initialized the PLL and the SDRAM which will ensure that the CCLK generated is in accordance to your requirement?

    You would like to go through any of the example codes given in the following path:

    …\Program Files (x86)\Analog Devices\VisualDSP 5.0\214xx\Examples\ADSP-21489 EZ-Board

    All these example codes have PLL initialization code, which will program the PMCTL register corresponding to maximum Core clock frequency of 400MHz. You can use this code in your application and can check if you still face the issue in your target board or not.

    Please let me know your observation for the same.

    Thanks,

    Harshit

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  • Hi Satya,

    Before I comment regarding the issue I would like to know what kind of application are you trying to run on the target board?

    Also in your code have you initialized the PLL and the SDRAM which will ensure that the CCLK generated is in accordance to your requirement?

    You would like to go through any of the example codes given in the following path:

    …\Program Files (x86)\Analog Devices\VisualDSP 5.0\214xx\Examples\ADSP-21489 EZ-Board

    All these example codes have PLL initialization code, which will program the PMCTL register corresponding to maximum Core clock frequency of 400MHz. You can use this code in your application and can check if you still face the issue in your target board or not.

    Please let me know your observation for the same.

    Thanks,

    Harshit

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