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AR# 50848

LogiCORE IP XAUI v10.4 and RXAUI v2.3, 7 Series - Reset might be needed after disabling Loopback


If using the XAUI core v10.4 and earlier and RXAUI v2.3 and earlier with a 7 series FPGA, a reset might need to be issued after disabling loopback.

If you stop the far end (or valid data is not present on the RX serial data inputs), then put the core into loopback and bring it back out of loopback, a reset is required to correctly initialize the core.


To work around this issue, you can either issue the main reset input to the core, or you can set the reset register bit to 0.15.

AR# 50848
Date Created 07/17/2012
Last Updated 09/15/2014
Status Active
Type General Article
  • XAUI