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joe306
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Registered: ‎12-07-2018

PS Reference Clock Frequency Selection

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Hello, I am designing a board with an Zynq Ultrascale+ MPSOC XCZU7CG-1FFVC1517I. I am deciding the frequency of the PS Reference Clock and see that on many of the Development boards they use 33.33Mhz. I would like to use 60Mhz. Is there a reason why so many Dev Boards choose 33.33Mhz?

I'm choosing 60Mhz so I'm able to get better clock resolution when I have the PS generate clocks for the PL side.

Thank you,

Joe

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joe306
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Registered: ‎12-07-2018
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sandrao
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Registered: ‎08-08-2007

Hi @joe306 

The Data Sheet has a section on the PS REFCLK requirements : https://www.xilinx.com/support/documentation/data_sheets/ds925-zynq-ultrascale-plus.pdf

You just need to ensure your choice meets the requirements. 

 

sandrao_0-1611070973921.png

 

Thanks,

Sandy


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joe306
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