The -clock_vtree_type
option is used
in place_design
to specify the type of clock tree
to be used. The valid values are balanced, interSLR, and intraSLR. The default value
is balanced. This option does not affect clocks using calibrated deskew.
Use the -clock_vtree_type
option to
select the clock tree that minimizes the clock skew for the types of timing
challenges seen in the design:
- Select intraSLR to minimize clock skew within each SLR
- Select interSLR to minimize clock skew on paths between SLRs
- Select balanced for the best compromise between intraSLR and interSLR
Note: Placer clock V-tree type properties are case
sensitive. Using the wrong case generates an error message stopping the placer flow.
Accepted types are: balanced, interSLR, intraSLR.