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ISE时序约束
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2010-01-11
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ISE时序约束:What effects do timing constraints have on your project?
• The implementation tools do not attempt to find the place & route that will
obtain the best speed
– Instead, the implementation tools try to meet your performance
expectations
• Performance expectations are communicated with timing constraints
– Timing constraints improve the design performance by placing logic closer
together so shorter routing resources can be used
– Note that when we discuss using the Constraints Editor, we are referring to
the Xilinx Constraints Editor
• The implementation tools do not attempt to find the place & route that will
obtain the best speed
– Instead, the implementation tools try to meet your performance
expectations
• Performance expectations are communicated with timing constraints
– Timing constraints improve the design performance by placing logic closer
together so shorter routing resources can be used
– Note that when we discuss using the Constraints Editor, we are referring to
the Xilinx Constraints Editor
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mouxiang
2011-07-22
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