load -max [expr $MAX_LOAD*15] [all_outputs] set_max_fanout 10 [all_inputs] setmax_transition 1.0 $TOP_MODULE #获得所有输入输出引脚除clk和rst之外,为多个设置约束 set in_ports [remove_fromcollection [all_inputs[get_ports [list PAD_clk PAD_reset]]] set out_ports [get_ports [...
Findallinputportsconstrainedbyaclock34.all_outputs:Findalloutputports.35.all_registers–level_sensitive–data_pins:Findthedatapinnamesofalllatches.36.all_connectedU1/Z:Findthenetconnectedtoapin.37.report_constraint–all:Listallviolations,sortedbyclockdomain38.report_timing–nets:可以看到Fanout-significant...
26. all_connected U1/Z : Find the net connected to a pin. 27.report_constraint –all :List all violations, sorted by clock domain 28.report_timing –nets :可以看到 Fanout -significant_digits 3 :显示小数点后3位 29. get_alternative_lib_cell –lib lib_name instance_name:找功能相同的单元...
36.all_connectedU1/Z:Findthenetconnectedtoapin. 37.report_constraint–all:Listallviolations,sortedbyclockdomain 38.report_timing–nets:可以看到Fanout -significant_digits3:显示小数点后3位 39.get_alternative_lib_cell–liblib_nameinstance_name:找功能相同的单元 40.report_net–connections–verbosenetname...
36. all_connected U1/Z : Find the net connected to a pin. 37.report_constraint –all :List all violations, sorted by clock domain 38.report_timing –nets :可以看到 Fanout -significant_digits 3 :显示小数点后3位 39. get_alternative_lib_cell –lib lib_name instance_name:找功能相同的单元...
Delays Input and output delays, all delay annotations, andtiming checks Net and port attributes Capacitance, resistance, and fanout Design environment Wire load model, operationcondition, drive, driving cell,and transition Design rules Minimum and maximum capacitance, minimum andmaximum fanout, and minim...
设计规则检查,包括最大电容(maximumcapacitance)、最大传输时间(maximumtransition)和最大扇出(maximumfanout) PrimeTime时序分析流程和方法: 在时序分析之前需要做的步骤: 1、 建立设计环境 - 建立搜索路径(searchpath)和链接路径(linkpath) - 读入设计和库
Primetimereports-AdvancedSTA(Mutlipleclocks,Latches,OCV)-SettingupPrimetime(Appendix1)WhatisStatictimingAnalysis?•WhatisstaticTimingAnalysis(STA)?Itisamethodtodetermineifacircuitmeetstimingconstraintswithoutsimulation.•WhyStaticTimingAnalysis?–100%pathcoverageispossiblebecausenodesignspecificpatternisrequired –All...
43、x 1.0-clock clkall_i nputsset_ in put_delay-min 0.2-clock clkall_i nputsset_output_delay-max 1.0-clock clkall_outputsset_output_delay-min 0.1-clock clkall_outputsset_drive 0 reset,clk set_max_area0set_max_fanout5all_i nputsset_max_tran siti on2all_i nputsreport_c on stra in...
时序解决方法 report_bottleneck –cost_type fanout_endpoint_cost Cell Reference Bottleneck cost U1/FF1 Q 100.00 get_alternative_lib_cell –lib my_lib FF1 {“fdef1a5”, “fdef1a30”} This cell is Involved in 100 violations 时序分析常用命令 Report_analysis_coverage Type of Check Total Met ...