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AR# 14695

4.1i Virtex-II MAP - FDDRRSE are not packed into IOBs, and logic becomes corrupted


Keywords: FDDRRSE, pack, place, MUXCY, CYMUX

Urgency: Standard

General Description:
A case has been seen where FDDRRSE registers are not handled correctly by MAP when they are driven by MUXCY symbols. Rather than being packed into the IOB, one register is packed into the same slice as the MUXCY, and the other is lost.


There is no known work-around for this issue, but this problem is fixed in the latest 4.2i Service Pack, available at:
The first service pack containing the fix is 4.2i Service Pack 3.
AR# 14695
Date 08/20/2003
Status Archive
Type General Article
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