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# 35697

Spartan-6 - The IBIS file is missing models for UNTUNED IOSTANDARDs

Description

Some models are not available in theSpartan-6 FPGA IBIS file, release 1.3. For example, LVCMOS15 UNTUNED_25 is missing.

Solution

Spartan-6 FPGA IBIS models file (release 1.3) covers most of the available IOSTANDARDS.

For urgent simulations, some of the missing models can be temporarily replaced by similar models already in the file as follows:

Missing Model Equivalent Model LR Equivalent Model TB
LVCMOS15 UNTUNED_25
SSTL15_OT25_LR_25
Missing - LR is similar
LVCMOS15 UNTUNED_50
SSTL15_OT25_LR_50
Missing - LR is similar
LVCMOS15 UNTUNED_75
SSTL15_OT25_LR_75
Missing - LR is similar
LVCMOS18 UNTUNED_25
SSTL18_OT25_LR_25
SSTL18_OT25_TB_25
LVCMOS18 UNTUNED_50
SSTL18_OT25_LR_50
SSTL18_OT25_TB_50
LVCMOS18 UNTUNED_75
SSTL18_OT25_LR_75
SSTL18_OT25_TB_75
AR# 35697
Date Created 03/23/2012
Last Updated 12/15/2012
Status Active
Type General Article
Devices
  • Spartan-6 LX
  • Spartan-6 LXT