Optional -> BLUE
Steps -> YELLOW
Sub-Categories -> GREEN
#To create user define log file (no extension required)
innovus –log <filename>
set init_verilog <name.v>
set init_pwr_net {VDD}
set init_gnd_net {VSS}
set init_io_file <name.io>
set init_cpf_file <name.cpf>
set init_mmmc_file <mcmm.view>
#MCMM
create_library_set –name Setup –timing {…}
create_library_set –name Hold –timing {…}
create_constraint_mode –name SDC –sdc_files {…}
create_op_cond –name OPcond –library_file <.lib> -P {} –V{} –T{}
create_rc_corner –name <name> -cap_table <.CapTbl> -T {}
create_delay_corner –name DelayCorner –early_library_set {Setup} –rc_corner
<name>
create_delay_corner –name DelayCorner - late_library_set {Hold}
–rc_corner <name>
create_analysis_view –name setup_view –constraint_mode {SDC} –
delay_corner {DelayCorner}
create_analysis_view –name hold_view –constraint_mode {SDC} –
delay_corner {DelayCorner}
set_analysis_view –setup {setup_view} –hold {hold_view}
#To create user define top cell name
set init_design_settop {1}
set init_top_cell <name>
#Check Netlist Uniqueness while importing design
set init_design_uniquify {1}
#To update existing lib files in design
update_library_set –timing {…}
#Get Design Tech node
getDesignMode -process
#Sanity checks
checkDesign |-netlist| |-physicalLibrary| |-timingLibrary|
check_timing
checkUnique
timeDesign (similar to report_qor)
report_clocks
#ZIC check
setDelayCalMode –ignoreNetLoad true
#Change above command to false after timing check
report_timing |timeDesign
#Check the views/scenarios
all_analysis_views
all_hold_analysis_views
all_setup_analysis_views
#Report all views in design
report_analysis_views
#Set a view
set_anaylsis_view –setup <func_max_setup scan_max_setup> –hold
<func_min_hold scan_min_hold>
#Pin/Port Assignment
loadIoFile ./<name.io>
(or)
assignIoPins
#Add I/O Buffers
attachIOBuffer –port –in<BUFF> -out <BUFF> -suffix “_buff” –markFixed
addIoFiller –cell –prefix –side
#Note: Before adding io fillers add the global net connection to apply rules for
supply pins.
#Set Tech/Design Mode -> Specify process tech. node for design which changes
the coupling capacitance
130nm -> 3
45nm and below -> 0.1
setDesignMode –process 45
setDesignMode –reset –process
#Do Floor Plan - Decide AR and IO Clearance
Floorplan->Edit Floorplan->Color Module
floorplan –site
addIoFiller –cell <name> -prefix –side
#Apply blockages and halos
addHaloToBlock {L B R T} –allBlock
addRoutingHalo –all_blocks –space –bottom –top
deleteHaloFromBlock –allBlock
createPlaceBlockage –box –type soft
deletePlaceBlockage -all
#Mark steps during FP
refineMacro –markStep
refineMacro –restoreStep -1
#Remove Macros
unplaceAllBlocks
#Post FP Check
checkDesign –all
checkFPlan –reportUtil
report_power
report_constraint
#Fix Macros
setBlockPlacementStatus –allHardMacros –status fixed
#Save FP
saveFPlan <name.fp>
#Power Planning
clearGlobalNets
globalNetConnect VDD –type pgping –pin VDD –inst *
globalNetConnect VSS –type pgping –pin VSS –inst *
#Tie cells have to be tied to VDD and VSS
globalNetConnect –type tieHigh –pin VDD –inst *
globalNetConnect –type tielow –pin VSS –inst *
#Verify Common Power File (CPF)/UPF for MV design
runCLP
#Add Ring if required, straps and power rails
In Power tab
#Checks for Power Plan
Verify -> DRC, Connectivity & Geometry
#If scan chain is present in design
defIn -<name.scandef>
#Check Scanchains
scanTrace
setPlaceMode –place_global_ignore_scan true
scanTrace –lockup [-verbose]
setScanReorderMode -<switches…>
#If data lockup latches are present
#specifyScanChain
specifyLockupElement
#To perform SI analysis set OCV for delay calc. mode. This is required for noise
analysis -> Done after PostRoute
setAnalysisMode –analysisType onChipVariation –checkType {setup | hold} –
aocv {true | false}
#Optional – Place JTAG cells near core before doing placement
specifyJtag –cell <name>| inst jtag*
placeJtag
reportJtagInst
unplaceJTAG
#Set CPU cores
setMultiCpuUsage –keepLicense true –localCPU 16
#Set DRV limits/Before setting this set MMCM constraint modes
(set_interactive_constraint_modes)
set_max_capacitance <dbGet top.name>
set_max_transition <dbGet top.name>
set_max_fanout <dbGet top.name>
reportFanoutViolation
#To create path groups
group_path –name reg2reg –from all_registers –to all_registers
reportPathGroupOptions
resetPathGroupOptions
#Set Optimization for diff. path groups
setPathGroupOptions reg2reg –effortLevel high
#Pin Placement
assignIoPins
checkPinAssignment
#Placement/GigaPlace
setPlaceMode –reset
setPlaceMode –fp false
setPlaceMode –place_global_cong_effort -noPrePlaceOpt –fixDrc place_global_timing_effort
getPlaceMode -setupTargetSlack –fixDrc <switches…>
placeDesign
#Method 2 (placeDesign + optDesign –preCTS) Provides better PPA and faster
run time/GigaOpt
setPlaceMode -<switches…>
setOptMode -<switches…> #setOptMode contains options for all optDesign
command used in design
setOptMode –fixFanoutLoad –maxDensity –placeIoPins
place_opt_design (placeDesign + optDesign –preCTS)
#Checks after Placement
checkPlace
checkFPlan –reportUtil
reportCongestion
reportArea
report_timing
timeDesign –numpaths 50 –preCTS –drvReports #to report DRVs and setup
timeDesign –preCTS –hold –outDir <name> #to report hold violations
report_constraints -type
report_constraints –all_violators
# Timing optimization on design and on reg2reg paths/ or other paths
analyze_paths_by_basic_path_group #To automatically get basic path groups
in Timing Debugging
group_path –name <name> -from <name> -to <name>
setPathGroupOptions <name> –targetSlack -100 –weight –effortLevel
reportPathGroupOptions
setOptMode –yieldEffort –effort –fixDRC –fixFanoutLoad –setupTargerSlack –
holdTargetSlack -<switches…>
optDesign –preCTS –setup –drv -<switches…>
reset_path_group –all
#Add Repeaters
ecoAddRepeater –net –cell BUFFx4
#If it’s a inverter, it has to be added in pairs
ecoChangeCell –upsize –inst <inst_name>
ecoAddRepeater –net <net_name> –cell INVX4 (OR)
ecoAddRepeater –term <pin_name> –cell BUFFX4
ecoChangeCell –upsize –inst <inst_name>
ecoRoute
#Remove Placement
unplaceAllInsts
#(Setting Scenario & propagating CLK) View/Scenario & has to set before going
to CTS
all_analysis_views
get_sdc_mode | all_constraint_modes
update_constraint_mode –sdc_files <name.sdc>
set_interactive_constraint_modes <sdc_name> |
set_interactive_constraint_modes [all_constraint_modes –active] #to set all
constraint modes as active
get_interactive_constraint_modes
set_propagated_clock [all_clocks]
get_propagated_clock –clock [all_clocks] #Check if clocks are propagated
#Check min clock pulse width
report_constraints
#STA (Timing -> Debug Timing)
timeDesign –preCTS –drvReports –outDir <name> #To report DRVs & Setup
timeDesign –preCTS –hold –outDir <name> #To report hold violations
report_timing –path_group reg2reg
#Move cells to reduce Congestion and type the foll. command to update Gcell
Destiny Map
reportDensityMap
#Pre CTS Fixes (to fix max tran, max cap and max fanout)
setOptMode –fixFanoutLoad true
optDesign –preCTS –drv -setup #optDesign command is used for Pre/Post CTS
timing optimization
#Report QOR once again to check for DRVs
timeDesign –preCTS -drvReports
report_constraints –all_violators
#Creating NDR
add_ndr –name –spacing {metal1:metal4 <value> ….} |–width {metal1:metal4
<value>…} | -generate_via
exportNdr <name> -def
modifyNdr –name <name>
#List existing NDR
dbGet head.rules.name
#Adding NDR to route type
create_route_type –name leaf_rule –non_default_rule 2W1S –
top_preferred_layer –bottom_preferred_layer –shield_net VSS
create_route_type –name trunk_rule –non_default_rule 2W2S –
top_preferred_layer M1 botton_preferred_layer M4 –shield_net VSS
set_ccopt_property –net_type trunk route_type trunk_rule
set_ccopt_property -net_type leaf route_type leaf_rule
#Set CCOPT properties
#Set NDR rules for CTS
set_ccopt_property –net_type leaf/trunk/top -route_type
leaf_rule/trunk_rule/top_rule
set_ccopt_property buffer_cells {BUFx12…}
set_ccopt_property inverter_cells {INV…}
set_ccopt_property clock_gating_cells {ICG…}
#Set target skew for whole design
set_ccopt_property target_skew <value>
#Set target skew for particular skew group
create_ccopt_skew_group -<switches…>
set_ccopt_property –skew_group <name> target_skew <value>
set_ccopt_property use_inverters –clock_tree <name> true
#Set preference for inverters
Set_ccopt_property use_inverters true
#Set target skew and max trans
set_ccopt_property target_max_trans 100ps
set_ccopt_property target_skew 50ps
#Get applied CCOPT Properties
get_ccopt_property –target_max_capacitance
get_ccopt_property –target_max_trans
#Reset all the properties set in set_ccopt_property
reset_ccopt_config
#Report special pins in CTS
report_ccopt_clock_trees –list_special_cells
#Dumping out a SPEC file
create_ccopt_clock_tree_sepc –file <name>
#Classical CTS
#Apply settings for CTS
setCTSMode setOptMode -<switches…>
#Create SPEC file
create_clockTreeSpec –file <name.ctstch>
clockDesign –specfile <name.ctstch> -outDir clock_report
ccopt_design –cts
#CCD CTS
setDesignMode -<switches…>
setOptMode -<switches…>
#Create/Source SPEC file
create_ccopt_clock_tree_spec –file <name.spec>
source <name.spec>
create_ccopt_clock_trees
create_ccopt_clock –spine/HTree
#Place high drive strength clk buffers near newly created stripes to reduce IR
drop
create_ccopt_preferred_cell_stripe –cells {<clkbuffer_list>}
#To reduce EM
Lets you find the maximum capacitance that a cell can drive without violating
EM constraints and then set that cap value as the target max cap. value for
that cell.
set_ccopt_property consider_em_constraints rms|avg|peak
get_ccopt_property consider_em_constraints
#Remove –cts to perform CCD
ccopt_design
(optional->generally not required if u are using CCD) OptDesign –postCTS –hold
#Clock Tree Debugger
ctd_win
get_ctd_win_id –detail
#PostCTS checks
timeDesign –postCTS -drv–outDir <name> #Setup violations
#Hold Checks
setAnalysisMode –check_type hold
timeDesign –postCTS –hold
report_timing –check_type hold
#Post CDDCTS checks
report_ccopt_clock_tress –file clock_trees.rpt
report_ccopt_skew_groups –file skew_groups.rpt
report_clock_timing –type summary
#If there are high no. of HOLD violations PostCTS use “optDesign” command
#Hold has to be reduced at postCTS, but does not have to be 0.
setOptMode –holdTargetSlack -0.2
optDesign –postCTS –hold –outDir <name>
timeDesign –postCTS –hold –outDir <name> #Check hold violations again
#Signal Routing
#PreRoute Checks
checkPlace
verifyGeometry
add_tracks #Tracks are already added based on routing pitch, layer width,
spacing and min via widths. It can be overwritten by using the above
command.
#To fix SI induced max trans.
setOptMode –fixSISlew true
#Set routing options (The options set using this command affects the following
commands ->detailRoute, globalRoute, globalDetailRoute, routeDesign
#To set Hard Layer Limits
setNanoRouteMode –routeTopRoutingLayer –routeBottomRoutingLayer –
routeWithTimingDriven –fixAntenna <-switches…>
#To keep clock nets status fixed use
setNanoRouteMode –routeDesignFixClocksNets true
#To set Soft Layer Limits
setAttribute
-bottom_preferred_routing_layer
-top_preferred_routing_layer
-preferred_routing_layer_effort
#Set max and min routing layer for EARLY GLOBAL ROUTE -> It affects
placeDesign and optDesign
setRouteMode –earlyGlobalMinRouteLayer –earlyGlobalMaxRouteLayer
earlyGlobalRoute -> Quick global route for estimating congestion and parasitic
RC values
setRouteMode -reset
setNanoRouteMode –routeBottomRoutingLayer
setNanoRouteMode –routeTopRoutingLayer
setNanoRouteMode –reset
#Reducing CrossTalk
setAttribute –preffered_extra_space #adds extra space between critical nets
-weight # to give priority to critical nets within switch box
-avoid_detour # to ensure the critical nets are routed as short as possible
- Minimize long parallel wires
-shield_net VSS
#Fix Antenna using Diodes
setNanoRouteMode –routeInsertAntennaDiode true
globalDetailRoute
globalNetConnect
#Perform Routing/NanoRoute
routeDesign –global
routeDesign –detail
Note: For detail routing. (Switch Boxes ->5x5 SB is 25 gcells). SWs grow bigger
after each iteration (typical -> 20iterations). No improvement beyond 20
iterations.
(OR)
#Timing Driven (Run time and no. of violations increase, since detours are
restricted for the most part; so increase congestions )
routeDesign –timingDriven –SI driven –globalDetail
editDeleteViolations #if violations are there
Reroute the Design
#PostRoute Checks
The analysis needs to be set to OCV in post route instead of BcWc.
setAnalysisMode –analysisType onChipVariation
Recommendation -> set –cppr both #Remove CRPR for both setup and hold
modes
timeDesign –postRoute –drv –slackReport #setup
timeDesign –postRoute –slackReport –hold
checkRoute
reportWire #includes net name, wire ratio (total net routing length/half –
perimeter of net bounding box), real and min wire lengths, no. fo vias, fanins
and fanouts
reportRoute
#Post Route Optimization (If no. of violations is high)
optDesign –postRoute –hold | -setup |
#PostRoute Via Optimization
Replace single cut vias with multi-cut or fat vias to increase yield
generateVias
routeDesign –viaOpt
#EcoRouting
#Fixing Max trans
ecoAddRepeater –term U566/A –cell BUFFX4
report_constraint -drv_violation max_transition
ecoRoute
setAttribute –net <name> -skip_routing true
setAttribute –net <eco_name> -skip_routing false
#Post Route RC Extraction
setExtractRCMode –engine postRoute
#RC Extraction
#Chip Finishing (Add filler cells)
addFiller –cell <cell_list> –prefix –doDRC
setMetalFill
addMetalFill
verifyMetalFill
#To improve timing for critical nets for timing closure
setMetalFill
trimMetalFillNearNet
#Dump out GDS
streamOut <name.gds> -mapFile –libName –merge –uniquifyCellNames –units
–mode
#Check Timing
timeDesign –signoff –outDir <name>
timeDesigb –signoff –hold –outDir <name>