CTS Spec

setCTSMode -routeTopPreferredLayer 5 -routeBottomPreferredLayer 4 -routeShielding VSS -routeNonDefaultRule ndr
setDontUse BUFX2 false
setDontUse INVX1 false
setDontUse BUFX2 false
setDontUse INVX1 false
set_dont_touch [get_lib_cells BUFX2] false
set_dont_touch [get_lib_cells INVX1] false
setDontUse CLKBUF* true
setDontUse CLKINV* true
setDontUse DLY* true
## cts targets##
set_ccopt_property target_max_trans 1 (10% clock period)
set_ccopt_property routing_top_min_fanout 35
set_ccopt_property target_skew 1 (10% of clk)
set_ccopt_property -net_type trunk target_max_trans 0.500
set_ccopt_property -net_type leaf target_max_trans 0.400
set_ccopt_mode -cts_opt_type full
#### latency and uncertainty targets#####
set_clock_latency 4 [get_clocks wb_clk]  (40% of clk)
set_clock_uncertainty 1.3 -setup [get_clocks clk] (including 10% skew+1%jitter+200ps margin)
set_clock_uncertainty 1.2 -hold [get_clocks clk] (including 10% skew+100ps margin)
add_ndr ndr -width {Metal4 0.16 Metal5 0.16} -spacing {Metal4 0.14 Metal5 0.14}
create_route_type -name CTS_2w1s -non_default_rule cts2w1s
set_ccopt_property route_type -net_type trunk CTS_2w1s
set_ccopt_property max_fanout 30