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PicoZed SDR Software-Defined Radio Negative Slack

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Negative Slack

ags1 over 8 years ago

I have a design (an IP) which is working fine with ZC706 but the same design is giving me a negative slack problem when used with PicoZed.

Please let me know the difference between the two on functional level.

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0 drozwood90 over 8 years ago

Hi there,

Since you seem to have such similar fabric, I would suggest you go back through your constraints. If you are marginal on one chip, there is a strong possibility that you will not be able to meet timing on the other, this is especially true if the clock tree changes as the constraints are not providing enough information to properly set the layout.

The other issue I can think, were you working in different version of Vivado? The algorithms used to meet timing can sometimes change between versions.

--Dan
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0 ags1 over 8 years ago in reply to drozwood90

Thanks for the reply Dan.
Yes I was using Vivado 2014.2 for the ZC-706 but I had to switch to Vivado 2015.2.1 for PicoZed SDR.
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0 ags1 over 8 years ago in reply to drozwood90

Thanks for the reply Dan.
Yes I was using Vivado 2014.2 for the ZC-706 but I had to switch to Vivado 2015.2.1 for PicoZed SDR.
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