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AR# 31231

11.1 MAP - ERROR:LIT:411 - IOBUFDS symbol <symbol name> does not have IOSTANDARD specified


I see the following error in MAP:

"ERROR:LIT:411 - IOBUFDS symbol <symbol name> does not have IOSTANDARD specified"


The IOSTANDARD constraint may be set in Schematic, HDL, XCF, or UCF files.

Constraints in a UCF file will take precedence over a conflicting constraint in a Schematic, HDL or XCF file.

If a UCF file is being used, make sure that it has been properly added to the project.

For information on applying the IOSTANDARD constraint, see the Xilinx Constraints Guide Software Manual.

For valid IOSTANDARD values, see the Data Sheet for the desired device family. Go to: http://www.xilinx.com/support/mysupport.htm
Select the desired Device Family tab, and then click "Data Sheets" under "Hardware Documentation".
AR# 31231
Date 11/29/2010
Status Active
Type General Article
  • ISE Design Suite - 11.1
  • ISE Design Suite - 11.2
  • ISE Design Suite - 11.3
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  • ISE Design Suite - 11.4
  • ISE Design Suite - 11.5
  • ISE Design Suite - 12.1
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