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AR# 46768

13.3, 13.4, 14.1 Spartan-6 GTP IBERT - The line rate shows an incorrect rate when running at 2.5 Gbps


There is a known issue with the Spartan-6 FPGA GTP IBERT core in 13.3, 13.4, and 14.1.This answer recorddiscusses the issue in detail.


The Spartan-6 FPGA GTP IBERT core in 13.3, 13.4, and 14.1does not show the correct line rate when the transceiver is set to 2.5 Gbps. Instead, the IBERT core shows a line rate of 2.042 Gbps. This should not cause an issue with evaluating the transceivers in the Spartan-6 device, since it is actually running at 2.5G. This only affects the link status rate shown in the interface. This issue is to be addressed in version 14.2 of the tools.

Linked Answer Records

Master Answer Records

AR# 46768
Date 05/20/2012
Status Active
Type Known Issues
  • Spartan-6 LXT
  • ChipScope Pro - 13.3
  • ChipScope Pro - 13.4
  • ChipScope Pro - 14.1
  • ChipScope Pro IBERT for Spartan-6 GTP
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