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AR# 57310

XAPP1241/XAPP589 v2.2 –Place warnings [Place 30-568]


When running the XAPP in Vivado, the following warnings can be seen for each PICXO instance:

A LUT 'xxxxxx' is driving clock pin of 1 registers.
This could lead to large hold time violations.
First few involved registers are: xxxxxx {FDCE}


These warnings can be safely ignored.

Linked Answer Records

Master Answer Records

Answer Number Answer Title Version Found Version Resolved
56136 XAPP589 - XAPP1241 - All Digital VCXO Replacement (PICXO) - Design Assistant / Master Answer Record N/A N/A
AR# 57310
Date 04/14/2016
Status Active
Type General Article
  • Artix-7
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  • Virtex-7
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