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AR# 22166

7.1i NetGen - The X_ODDR module performs setup and hold checks relative to the incorrect clock edge when DDR_CLK_EDGE attribute is set to "OPPOSITE_EDGE"


Keywords: simulate, SimPrim, output, timing

Urgency: Standard

General Description:
During timing simulation of the X_ODDR module, when DDR_CLK_EDGE attribute is set to "OPPOSITE_EDGE", setup and hold checks of port D2 are relative to incorrect clock edge. All of the setup and hold checks should be with respect to the negative edge of the clock, not the positive edge.


Currently, there is no way to work around this issue.

This issue is fixed in 8.1.
AR# 22166
Date Created 09/04/2007
Last Updated 11/17/2008
Status Archive
Type General Article