AR #32518 - 11.1 Virtex-5 MAP Known Issues - OSERDES/IODELAY/OBUFDS using IOSTANDARD DIFF_HSTL_II_DCI not mapped correctly

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11.1 Virtex-5 MAP Known Issues - OSERDES/IODELAY/OBUFDS using IOSTANDARD DIFF_HSTL_II_DCI not mapped correctly

AR#	32518
Part	SW-MAP
Last Modified	2009-04-23 00:00:00.0
Status	Active
Keywords	regression, DIFF_HSTL_II_DCI, OSERDES, IODELAY, OBUFDS, unroutable

Description

Keywords: regression, DIFF_HSTL_II_DCI, OSERDES, IODELAY, OBUFDS, unroutable

My design ran ok in ISE version 10.1, but now I am seeing unroutable connections involving some of my OSERDES I/O which drive through an IODELAY to an OBUFDS using IOSTANDARD DIFF_HSTL_II_DCI. Is this a known issue?
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Solution

An 11.1 regression for such a case has been seen on an internal design. A fix is scheduled for ISE version 11.2. If you encounter this problem prior to the release of version 11.2, please open a Webcase and refer to this Answer Record by number.