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AR# 61656

2014.2 - Vivado_DRC: (REQP-52) - GTXE2_CHANNEL cell gtxe_xx: Use of the GTGREFCLK is reserved for test purposes only. This has the lowest performance of the available clocking methods and can degrade transceiver performance.

Description

I am receiving the following DRC Error in my design:
 

GTXE2_CHANNEL cell gtxe_xxx: Use of the GTGREFCLK is reserved for test purposes only.
This has the lowest performance of the available clocking methods and can degrade transceiver performance.

Solution

In the past this message had the severity of "Advisory", however, in the 2014.2 release the severity of this message was upgraded to "Error".


As per (UG476), GTGREFCLK is a reserved pin which should not been used in your design.

Linked Answer Records

Master Answer Records

Answer Number Answer Title Version Found Version Resolved
53500 Serial Transceiver - Why is REFCLK recommended over GREFCLK for any GT? N/A N/A
AR# 61656
Date Created 07/30/2014
Last Updated 03/05/2015
Status Active
Type General Article
Devices
  • FPGA Device Families
Tools
  • Vivado Design Suite - 2014.2