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Explorer
Explorer
205 Views
Registered: ‎10-07-2016

Constraints: Overrule phase shift of mmcm clock output via xdc constraint ?

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Dear Xilinx community,

does anybody know, if it is possible to overrule the phase shift of a mmcm clock output, by using a xdc constraint ?

Kind regards

stgateizo

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Scholar dpaul24
Scholar
196 Views
Registered: ‎08-07-2014

Re: Constraints: Overrule phase shift of mmcm clock output via xdc constraint ?

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@stgateizo,

Yes you can change phase with XDC constraints. Something like...

set_property CLKOUT1_PHASE 0 [get_cells your_path/mmcm_adv_inst]

The above command changes the phase of the clk at clkout1 pin from 90 to 0 of mmcm_adv_inst.

--------------------------------------------------------------------------------------------------------
FPGA enthusiast!
All PMs will be ignored
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2 Replies
Scholar dpaul24
Scholar
197 Views
Registered: ‎08-07-2014

Re: Constraints: Overrule phase shift of mmcm clock output via xdc constraint ?

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@stgateizo,

Yes you can change phase with XDC constraints. Something like...

set_property CLKOUT1_PHASE 0 [get_cells your_path/mmcm_adv_inst]

The above command changes the phase of the clk at clkout1 pin from 90 to 0 of mmcm_adv_inst.

--------------------------------------------------------------------------------------------------------
FPGA enthusiast!
All PMs will be ignored
--------------------------------------------------------------------------------------------------------
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Explorer
Explorer
190 Views
Registered: ‎10-07-2016

Re: Constraints: Overrule phase shift of mmcm clock output via xdc constraint ?

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Hello dpaul24,

that's exactly what I'm looking for. Thank you for this advice.

Best regards

stgateizo

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