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KC705+FSCOMMS2 Reference design, change clock from 100M to 125M

Question asked by w9001156 on Oct 31, 2014
Latest reply on Nov 3, 2014 by w9001156

Hi,

 

I have a question about your AD9361 reference design for KC705.

This design is using 200Mhz difference clock input to DDR3 control, and DDR3 control MMCM will generate 100MHz clock output

for CPU& other design logic.

My question,

If I want to change 100MHz system clock to 125Mhz, how do I change the reference design?

 

I check in your reference design "kc705_system_mig.prj"

<UIExtraClocks>1</UIExtraClocks>

        <MMCMClkOut0> 8.000</MMCMClkOut0>

        <MMCMClkOut1>1</MMCMClkOut1>

        <MMCMClkOut2>1</MMCMClkOut2>

        <MMCMClkOut3>1</MMCMClkOut3>

        <MMCMClkOut4>1</MMCMClkOut4>

 

But I generate DDR3 control project file by GUI, I always get the following,  how to enable to use "UIExtraClocks"?

<UIExtraClocks>0</UIExtraClocks>

        <MMCMClkOut0> 1.000</MMCMClkOut0>

        <MMCMClkOut1>1</MMCMClkOut1>

        <MMCMClkOut2>1</MMCMClkOut2>

        <MMCMClkOut3>1</MMCMClkOut3>

        <MMCMClkOut4>1</MMCMClkOut4>

 

 

Thanks

Outcomes