alphus
Newbie level 6
Hello,
i have a project in Cadence Encounter with hierarchical blocks, where full-chip IR-drop analysis is needed.
For each hierarchical block i have .LEF, .DEF files and current files (.ptiavg).
I generated the hierarchical PGV (HPGV) for each block in the design.
Design has a feature - global nets in hier blocks and toplevel are different (vdd!, gnd! and vdd18! gnd18! respectively).
When i run the rail analysis (by analyze_rail), the data from hierarchical current file (.ptiavg) does not load correctly:
"failed to load static current data from Hier_pti/static_vdd!.ptiavg"
If i make global nets on top and in blocks with the same names, rail analysis is successful.
Can anyone help me?
i have a project in Cadence Encounter with hierarchical blocks, where full-chip IR-drop analysis is needed.
For each hierarchical block i have .LEF, .DEF files and current files (.ptiavg).
I generated the hierarchical PGV (HPGV) for each block in the design.
Design has a feature - global nets in hier blocks and toplevel are different (vdd!, gnd! and vdd18! gnd18! respectively).
When i run the rail analysis (by analyze_rail), the data from hierarchical current file (.ptiavg) does not load correctly:
"failed to load static current data from Hier_pti/static_vdd!.ptiavg"
If i make global nets on top and in blocks with the same names, rail analysis is successful.
Can anyone help me?