UPGRADE YOUR BROWSER

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# 37493

Spartan-6 IBIS - IN_TERM models missing

Description

The Spartan-6 IBIS model (v1.3)does not support IN_TERM. How can you work around this?

Solution

To work around the lack of IN_TERM in the Spartan-6 IBIS model, use discrete external resistors in your IBIS circuit. This can be done by adding two resistors, one to Vcco and one to GND, each with double the target IN_TERM value,for instance100 Ohms for the UNTUNED_SPLIT_50 setting.

IN_TERM.JPG
IN_TERM.JPG

Note: theSpartan-6FPGA Hspice modelsare available for download on www.xilinx.comand support the IN_TERM.

AR# 37493
Date Created 12/10/2012
Last Updated 12/10/2012
Status Active
Type General Article
Devices
  • Spartan-6 LX
  • Spartan-6 LXT
  • Spartan-6Q