AR# 14695: 4.1i Virtex-II MAP - FDDRRSE are not packed into IOBs, and logic becomes corrupted
4.1i Virtex-II MAP - FDDRRSE are not packed into IOBs, and logic becomes corrupted
Keywords: FDDRRSE, pack, place, MUXCY, CYMUX
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.