(一)SDF3.0 Timing Checks主要分以下两种: VCS/NC-Verilog后仿真在timing violation时报出warning; Timing Sign-Off工具报出timing check violations; 以时序分析工具Sign-Off为主,后仿为辅,SDF3.0 Timing Checks具体的类型如下: Setup Timing Check Hold Timing Check SetupHold Timing Check 注意,示例中~reset必须为...
(一)SDF3.0 Timing Checks主要分以下两种: VCS/NC-Verilog后仿真在timing violation时报出warning; Timing Sign-Off工具报出timing check violations; 以时序分析工具Sign-Off为主,后仿为辅,SDF3.0Timing Checks具体的类型如下: Setup Timing Check Hold Timing Check SetupHold Timing Check 注意,示例中~reset必须为...
1,仿真参数:去掉+nospecify +notimingcheck -add_dwq_delay 0.01ns 2,使用$sdf_annotate将延时加入网表 所谓的SDF文件就是:Standard delay file,它是把布局布线过程中器件延时和线延时的信息保留下来,据此就…
Some other warning are genearated for the memory cells as well: Warning-[SDFCOM_CFTC] Cannot find timing check RNSFIR-post_syn.sdf, 1466382 module: FD2QSVTX2, "instance: E.UUT.\fir_19/rey_051/z_reg[0] " SDF Warning: Cannot find timing check $hold(posedge CP,posedge CD,...) The...
Solution SDF files are produced by implementation tools and contain delay data and timing checks.Active-HDLsupports the latest version of SDF. InVHDLdesigns, data from SDF file can be loaded by passing the appropriate arguments to the asim command when simulation is initialized. You can also spe...
priod timing: no change timing: timing environment entries: path constraint: period constraint: sum constraint: diff constraint: skew constraint: SDF反标方法: makefile中调用:-sdf min|typ|max:instance_name:file.sdf 在module里面调用$sdf_annotate系统函数(配合$disable_warning("timing",instance)和$eb...
SDF Warning: Negative INTERCONNECT Dealy This negative value cannot be handled with switch -negdelay. Please check SDF files. 这种情况是由于SDF中的负interconnect延时不符合VCS的要求,即VCS在该负延时前后找不到正的延时进行合并处理。VCS user guide中说明如下: ...