解决方案
The following shows the incorrect connection of "dbg_pd_dec_dqs":
.dbg_pd_inc_dqs (dbg_inc_rd_dqs),
.dbg_pd_dec_dqs (dbg_inc_rd_dqs),
The correct connection is:
.dbg_pd_inc_dqs (dbg_inc_rd_dqs),
.dbg_pd_dec_dqs (dbg_dec_rd_dqs),
This issue is fixed in the ISE 13.1 MIG v3.7 software release.