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Visitor
Visitor
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Registered: ‎10-27-2019

Change a clock frequency

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Hi!

I use an FPGA 'xc7a35tcpg236-1' on BASYS3 with Vivado 2019.1 and Verilog.

I want to change a clock frequency from 100MHz to other frequencies, but the frequencies are difficult to generate by using counters. (ex. 13.56MHz, 33.33MHz)

Does anyone know how to generate these frequencies?

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Explorer
Explorer
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Registered: ‎06-25-2014

Re: Change a clock frequency

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Use one of the on chip MMCM's.

 

See this doc for detail on this block:

https://www.xilinx.com/support/documentation/user_guides/ug472_7Series_Clocking.pdf

 

To add one into your design you can use the clocking wizard IP located in Vivado's IP Catalog whcih provides a strait forward user interface. See:

https://www.xilinx.com/support/documentation/ip_documentation/clk_wiz/v6_0/pg065-clk-wiz.pdf

 

 

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Explorer
Explorer
339 Views
Registered: ‎06-25-2014

Re: Change a clock frequency

Jump to solution

Use one of the on chip MMCM's.

 

See this doc for detail on this block:

https://www.xilinx.com/support/documentation/user_guides/ug472_7Series_Clocking.pdf

 

To add one into your design you can use the clocking wizard IP located in Vivado's IP Catalog whcih provides a strait forward user interface. See:

https://www.xilinx.com/support/documentation/ip_documentation/clk_wiz/v6_0/pg065-clk-wiz.pdf

 

 

View solution in original post

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