We have detected your current browser version is not the latest one. Xilinx.com uses the latest web technologies to bring you the best online experience possible. Please upgrade to a Xilinx.com supported browser:Chrome, Firefox, Internet Explorer 11, Safari. Thank you!

AR# 53360

LogiCORE IP Tri-Mode Ethernet MAC v5.4 and earlier - Multiple pause frame requests can result in a corrupted pause quanta being output


When using the Tri-Mode Ethernet MAC v5.4 and earlier, it is possible for the pause quanta in a transmitted pause frame to become corrupted when requesting back to back pause frames. 

The upper 8 bits of previous pause value and lower 8 bits of the current pause value can incorrectly be sent together for the pause quanta in the same transmitted pause frame.


This issue has been resolved in the Tri-Mode Ethernet MAC v5.5 core.

If using the v5.1, v5.2, v5.3 or v5.4 cores, the SHIM in the below ar53360_tri_mode_eth_mac_pausereq_shim.zip file can be used with the core. 

See the readme file contained in ar53360_tri_mode_eth_mac_pausereq_shim.zip for information on how to instantiate and connect the SHIM.

If using the v4.6 Tri-Mode Ethernet MAC core, see (Xilinx Answer 53139)


Associated Attachments

Name File Size File Type
ar53360_tri_mode_eth_mac_pausereq_shim.zip 7 KB ZIP

Linked Answer Records

Master Answer Records

Answer Number Answer Title Version Found Version Resolved
54476 LogiCORE IP DUC/DDC Compiler - Release Notes and Known Issues for Vivado 2013.1 and newer tool versions N/A N/A
AR# 53360
Date Created 12/18/2012
Last Updated 12/19/2014
Status Active
Type General Article
  • Tri-Mode Ethernet MAC