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AR# 59296

7 Series GTX IBIS-AMI Model 3.2 limitations

Description

The IBIS-AMI model for 7 series GTX release 3.2 has several limitations that make hardware correlation difficult:
 
  • GTX IBIS-AMI 3.2 does not support statistical analysis.
  • In cases of DFE usage, the override method for Unrolled Tap is not functional.
  • The taps H3, H4, H5 are not present in the model but are present (TAP3, TAP4, TAP5) in the Hardware.
  • in DFE mode, only manual CTLE setup is possible.

Solution

Please only use the Time Domain method.
 
In cases of DFE usage, the UT must stay in auto adapting mode (RXDFEUTOVRDEN='0')
 
In order to properly compare hardware results and simulations, the adapted values for the equalizer and AGC in hardware and simulation must match.
AR# 59296
Date Created 02/03/2014
Last Updated 01/23/2015
Status Active
Type General Article
Devices
  • Kintex-7
  • Virtex-7