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To work around this issue, try using a different implementation strategy, other than "Performance Explore".
If the user logic is being driven by the mmcm_clk domain, try inserting an additional BUFG for the user logic to allow Vivado to properly balance the user and MIG domain.
If these violations are still seen please open a Service Request for assistance:
https://www.xilinx.com/support.html#serviceportal
Revision History:
Answer Number | Answer Title | Version Found | Version Resolved |
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69035 | UltraScale/UltraScale+ DDR4 - Release Notes and Known Issues | N/A | N/A |
AR# 64774 | |
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Date | 12/21/2017 |
Status | Active |
Type | Known Issues |
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