routing critical nets only in mtal 9

[ashutosh.bittoo@gmail.com]

Hi

I am routing refclk in top level. Due to skew requirment i need to route my signals in Metal9 only. When i use below code icc route the nets but with normal rule(M8 horizontal and M9 vertical) . But i want full routing in M9 only. Can you help me how to make it happen in ICC.

code i am using :

set_net_routing_layer_constraints -min_layer_name M8 -max_layer_name M9 [get_nets -of_objects BITTOO* ]
set_net_routing_rule -rule BLOCK_RULE  [get_nets -of_objects BITTOO* ] -reroute minorchange
route_zrt_group -nets [get_nets -of_objects BITTOO* ]

Thanks
ashu

 

[erikl]

Did you already try to set the min_layer constraint also to M9 ?