sky130hd/microwatt: tighten due to 0 tns

Signed-off-by: Matt Liberty <[email protected]>

Author: maliberty

flow/designs/sky130hd/microwatt/config.mk

@@ -30,14 +30,10 @@ export MACRO_PLACE_CHANNEL = 200 200
 
 # CTS tuning
 export CTS_BUF_DISTANCE = 600
-#export CTS_CLUSTER_DIAMETER = 100
-#export CTS_CLUSTER_SIZE = 30
 export SKIP_GATE_CLONING = 1
 
 export export SETUP_SLACK_MARGIN = 0.2
 
-export GLOBAL_ROUTE_ARGS=-congestion_iterations 100 -verbose
-
 # This is high, some SRAMs should probably be converted
 # to real SRAMs and not instantiated as flops
 export SYNTH_MEMORY_MAX_BITS ?= 42000

flow/designs/sky130hd/microwatt/constraint.sdc

@@ -2,7 +2,7 @@ current_design microwatt
 
 set clk_name ext_clk
 set clk_port_name ext_clk
-set clk_period 18.0
+set clk_period 15.0
 set clk_io_pct 0.2
 
 set clk_port [get_ports $clk_port_name]