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AR# 37455

Logicore CPRI v3.2 - Why does TXRESETDONE never get asserted and why does core fail to synchronize or get stuck with stat_code = 0010 in Virtex-6?

Description

An issue has been seen in Virtex-6 FPGA that causes the core not to reset correctly at all but the highest line rate (3.072G if 6G is not enabled or 6.144G if 6G is enabled).

Solution

The problem is that the TXRESETDONE signal from the GTX fails to assert. This is due to the issue described in (Xilinx Answer 35681). At all but the highest line rate the user must implement the double GTXTEST pulse as described in (Xilinx Answer 35681).

This issue is to be fixed in the next release of the Core (v4.1) which is currently scheduled for the ISE 13.1 software release.

For Release Notes and Known Issues for 12.2 for the LogiCore CPRI v3.2, please see (Xilinx Answer 36969).

Linked Answer Records

Master Answer Records

Answer Number Answer Title Version Found Version Resolved
36969 LogiCORE IP CPRI - Release Notes and Known Issues N/A N/A
AR# 37455
Date Created 08/18/2010
Last Updated 12/15/2012
Status Archive
Type General Article
IP
  • CPRI