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Design Archives - Dr. Pei

meet skew via constraint

July 6, 2015

setOptMode -ignorePathGroupsForHold {in2reg reg2reg in2out} -holdTargetSlack 0 -setupTargetSlack 0 -fixHoldAllowSetupTnsDegrade false setOptMode -holdFixingCells {BUFFER_NAME} setDelayCalMode -engine xxx -SIAware true -signoff true set_analysis_view -setup funcPostC_PVT_setup  -hold funcPostC_PVT_setup update_constraint_mode -name funcPostC -sdc_files “constraint_file_path” optDesign -postRoute -outDir ./rpts/fix_skew_setup update_constraint_mode -name funcPostC -sdc_files “constraint_file_path” setOptMode -fixHoldAllowSetupTnsDegrade true optDesign -postRoute -hold -outDir ./rpts/fix_skew_hold constraint file set DQS_TSEL_SEL {tsel_dqs_1_opad tsel_dqs_2_opad tsel_dqs_3_opad}… read more »

.lib

June 26, 2015

slew_lower_threshold_pct_rise : 30.00 slew_upper_threshold_pct_rise : 70.00 slew_upper_threshold_pct_fall : 70.00 slew_lower_threshold_pct_fall : 30.00 input_threshold_pct_rise : 50.00 output_threshold_pct_fall : 50.00 input_threshold_pct_fall : 50.00 output_threshold_pct_rise : 50.00 slew_derate_from_library : 0.50 To transition, general library data based on 10% – 90%, some library data based on 30% – 70%, but times 2 in order to modify range from 10%… read more »

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