ddr_sdram.srr

DDR sdram 包含的完整的源码,仿真的相关文件

                                                                     Required          
Instance                  Type                 Pin     Net           Time         Slack
---------------------------------------------------------------------------------------
control1.load_reg1        apex20k_lcell_ff     ena     RESET_N_c     4.1          -7.7 
control1.load_reg2        apex20k_lcell_ff     ena     RESET_N_c     4.1          -7.7 
data_path4.DATAOUT[0]     apex20k_lcell_ff     ena     RESET_N_c     4.1          -7.7 
data_path4.DATAOUT[1]     apex20k_lcell_ff     ena     RESET_N_c     4.1          -7.7 
data_path4.DATAOUT[2]     apex20k_lcell_ff     ena     RESET_N_c     4.1          -7.7 
data_path4.DATAOUT[3]     apex20k_lcell_ff     ena     RESET_N_c     4.1          -7.7 
data_path4.DATAOUT[4]     apex20k_lcell_ff     ena     RESET_N_c     4.1          -7.7 
data_path4.DATAOUT[5]     apex20k_lcell_ff     ena     RESET_N_c     4.1          -7.7 
data_path4.DATAOUT[6]     apex20k_lcell_ff     ena     RESET_N_c     4.1          -7.7 
data_path4.DATAOUT[7]     apex20k_lcell_ff     ena     RESET_N_c     4.1          -7.7 
=======================================================================================

Clock - clk100_inferred_clock [rising] : Printing a critical path for every start point reported above 

A Critical Path with worst case slack = -7.7 ns:  

The start and the end point of this path are clocked by the clk100_inferred_clock [rising]
Instance/Net                                    Pin         Pin     Arrival     Delta     Fan
Name                       Type                 Name        Dir     Time        Delay     Out
---------------------------------------------------------------------------------------------
RESET_N                    Port                 RESET_N     Out     0.0         0.0          
RESET_N_in_in              Net                                                            1  
RESET_N_in                 apex20k_io           padio       In      0.3                      
RESET_N_in                 apex20k_io           combout     Out     11.8        11.5         
RESET_N_c                  Net                                                            348
data_path1.DATAOUT[31]     apex20k_lcell_ff     ena         In      11.8                     
=============================================================================================
Setup requirement on this path is 0.9 ns. 


		Detailed Timing Report for  clock : clk200_inferred_clock 
		*******************************************
Requested Period 	  5.0 ns
Estimated Period 	  8.2 ns
Worst Slack 	 	 -3.2 ns

Start Points for Paths with Slack Worse than -2.5 ns : 

                                                                                Arrival          
Instance                Type                 Pin        Net                     Time        Slack
-------------------------------------------------------------------------------------------------
data_path4.DQOE         apex20k_lcell_ff     regout     data_path4.DQOE         7.8         -3.2 
data_path1.DQOUT[0]     apex20k_lcell_ff     regout     data_path1.DQOUT[0]     5.4         -3.1 
data_path1.DQOUT[1]     apex20k_lcell_ff     regout     data_path1.DQOUT[1]     5.4         -3.1 
data_path1.DQOUT[2]     apex20k_lcell_ff     regout     data_path1.DQOUT[2]     5.4         -3.1 
data_path1.DQOUT[3]     apex20k_lcell_ff     regout     data_path1.DQOUT[3]     5.4         -3.1 
data_path1.DQOUT[4]     apex20k_lcell_ff     regout     data_path1.DQOUT[4]     5.4         -3.1 
data_path1.DQOUT[5]     apex20k_lcell_ff     regout     data_path1.DQOUT[5]     5.4         -3.1 
data_path1.DQOUT[6]     apex20k_lcell_ff     regout     data_path1.DQOUT[6]     5.4         -3.1 
data_path1.DQOUT[7]     apex20k_lcell_ff     regout     data_path1.DQOUT[7]     5.4         -3.1 
data_path1.DQOUT[8]     apex20k_lcell_ff     regout     data_path1.DQOUT[8]     5.4         -3.1 
=================================================================================================

End Points for Paths with Slack Worse than -2.5 ns : 

                                                                        Required          
Instance             Type                 Pin       Net                 Time         Slack
------------------------------------------------------------------------------------------
data_path4.hi_lo     apex20k_lcell_ff     dataa     data_path4.DQOE     4.6          -3.2 
data_path3.hi_lo     apex20k_lcell_ff     dataa     data_path4.DQOE     4.6          -3.2 
data_path2.hi_lo     apex20k_lcell_ff     dataa     data_path4.DQOE     4.6          -3.2 
data_path1.hi_lo     apex20k_lcell_ff     dataa     data_path4.DQOE     4.6          -3.2 
DQ[63:0]             Port                 DQ[0]     dq_tri_tri[0]       5.0          -3.1 
DQ[63:0]             Port                 DQ[1]     dq_tri_tri[1]       5.0          -3.1 
DQ[63:0]             Port                 DQ[2]     dq_tri_tri[2]       5.0          -3.1 
DQ[63:0]             Port                 DQ[3]     dq_tri_tri[3]       5.0          -3.1 
DQ[63:0]             Port                 DQ[4]     dq_tri_tri[4]       5.0          -3.1 
DQ[63:0]             Port                 DQ[5]     dq_tri_tri[5]       5.0          -3.1 
==========================================================================================

Clock - clk200_inferred_clock [rising] : Printing a critical path for every start point reported above 

A Critical Path with worst case slack = -3.2 ns:  

The start point of this path has a clock (clk100_inferred_clock [falling]) that has an offset of 0.0ns with
respect to the start of the period of the destination clock (clk200_inferred_clock [rising])
Instance/Net                              Pin        Pin     Arrival     Delta     Fan
Name                 Type                 Name       Dir     Time        Delay     Out
--------------------------------------------------------------------------------------
data_path4.DQOE      apex20k_lcell_ff     regout     Out     7.8         7.8          
data_path4.DQOE      Net                                                           68 
data_path1.hi_lo     apex20k_lcell_ff     dataa      In      7.8                      
======================================================================================
Setup requirement on this path is 0.4 ns. 

A Critical Path with worst case slack = -3.1 ns:  

The start point of this path has a clock (clk200_inferred_clock [rising]) that has an offset of 2.5ns with
respect to the start of the period of the destination clock (clk200_inferred_clock [falling])
Instance/Net                                 Pin        Pin     Arrival     Delta     Fan
Name                    Type                 Name       Dir     Time        Delay     Out
-----------------------------------------------------------------------------------------
data_path1.DQOUT[0]     apex20k_lcell_ff     regout     Out     5.4         2.9          
data_path1.DQOUT[0]     Net                                                           1  
DQ_tri[0]               apex20k_io           datain     In      5.4                      
DQ_tri[0]               apex20k_io           padio      Out     8.4         3.0          
dq_tri_tri[0]           Net                                                           2  
DQ[63:0]                Port                 DQ[0]      In      8.1                      
=========================================================================================
This path has no setup requirement

A Critical Path with worst case slack = -3.1 ns:  

The start point of this path has a clock (clk200_inferred_clock [rising]) that has an offset of 2.5ns with
respect to the start of the period of the destination clock (clk200_inferred_clock [falling])
Instance/Net                                 Pin        Pin     Arrival     Delta     Fan
Name                    Type                 Name       Dir     Time        Delay     Out
-----------------------------------------------------------------------------------------
data_path1.DQOUT[1]     apex20k_lcell_ff     regout     Out     5.4         2.9          
data_path1.DQOUT[1]     Net                                                           1  
DQ_tri[1]               apex20k_io           datain     In      5.4                      
DQ_tri[1]               apex20k_io           padio      Out     8.4         3.0          
dq_tri_tri[1]           Net                                                           2  
DQ[63:0]                Port                 DQ[1]      In      8.1                      
=========================================================================================
This path has no setup requirement

A Critical Path with worst case slack = -3.1 ns:  

The start point of this path has a clock (clk200_inferred_clock [rising]) that has an offset of 2.5ns with
respect to the start of the period of the destination clock (clk200_inferred_clock [falling])
Instance/Net                                 Pin        Pin     Arrival     Delta     Fan
Name                    Type                 Name       Dir     Time        Delay     Out
-----------------------------------------------------------------------------------------
data_path1.DQOUT[2]     apex20k_lcell_ff     regout     Out     5.4         2.9          
data_path1.DQOUT[2]     Net                                                           1  
DQ_tri[2]               apex20k_io           datain     In      5.4                      
DQ_tri[2]               apex20k_io           padio      Out     8.4         3.0          
dq_tri_tri[2]           Net                                                           2  
DQ[63:0]                Port                 DQ[2]      In      8.1                      
=========================================================================================
This path has no setup requirement

A Critical P