Pre CTS or placement, clock latency, skew, transition are considered as ideal zero, but tool add clock buffer/inverter in CTS period in order to minimums clock latency/skew/transition as much as possible, clock tree has insertion delay after CTS. Post CTS and post route, comparing to datapath delay change, clock path in launch path ‘stretch’, especially… read more »
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 »
Which files do backend engineers need? Timing: lib RC delay: capTable, QRC tech, QRC lib Physical: lef, gds Route rule: tech lef, tech file Xtalk: cdb Power: VoltageStorm tech, VoltageStorm lib Which files are about design? Netlist, constraint, IO file, scan def
Which files do backend engineers need? Timing: lib RC delay: capTable, QRC tech, QRC lib Physical: lef, gds Route rule: tech lef, tech file Xtalk: cdb Power: VoltageStorm tech, VoltageStorm lib Which files are about design? Netlist, constraint, IO file, scan def