AR# 10256: 3.1i Virtex-E PAR - Problem with DLLIOB "SelectIO" input and placement
3.1i Virtex-E PAR - Problem with DLLIOB "SelectIO" input and placement
Keywords: DLLIOB, SelectIO, placer, placement
General Description: When the DLLIOB uses the FastFeedback pin, it should act as an input. If the DLLIOB uses a "SelectIO" STD, it is not being seen as an input; consequently, the placement is incorrectly allowing other I/Os into the VREF sites. The problem is caught by the general DRC of PAR.