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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <HTML> <HEAD> <META http-equiv="Content-Type" content="text/html; charset=iso-8859-1"> <META name="GENERATOR" content="IBM WebSphere Studio Homepage Builder Version 9.0.2.0 for Windows"> <META http-equiv="Content-Style-Type" content="text/css"> <TITLE></TITLE> </HEAD> <BODY> <P><B>6 Post-Layout Gate Simulation</B><BR> <B>6.1 Spartan3 Gate Simulation</B><BR> <BR> Memory Collision Errors are frequently reported as follows. <BR> </P> <P><IMG src="xilinx_gatesim2.png" width="783" height="734" border="0"><BR> <BR> Since this messages are meaningless for YACC. I checked disable warning option in coregen generation. However situation was the same. There is no help for it , I changed primitive description temporally as follows.<BR> <BR> parameter SIM_COLLISION_CHECK = "NONE";//All ORIG TAK Apr.12.2005<BR> <BR> <BR> <IMG src="xilinx_gate_sim1.png" width="783" height="734" border="0"><BR> Note:<BR> SDF Error Messages are due to transitional state of simulator at initial power on sequence.<BR> <BR> <BR> <BR> <BR> <B>6.2 Stratix2</B><BR> <BR> Run Test Bench at 165MHz.<BR> <IMG src="stratix2_gatesim.png" width="783" height="715" border="0"><BR> <BR> <BR> <B>6.3 Cyclone</B><BR> <BR> Run test bench at 104MHz<BR> <IMG src="cyclone_gate_sim.png" width="783" height="715" border="0"></P> </BODY> </HTML>