Mentor Graphics Calibre LVS with black-boxes

[HyperboL]

calibre lvs box

There is one problem during LVS process in CALIBRE:

There is one cell in project without real topology (only "abstract" - layout with pins). All the connections checked correctly, except connections to this cell. I.e. unconnected pins couse NO violations.

Is it possible to check connections to black-box cell during LVS in flat or hierarchical mode?

 

[nafraf]

calibre lvs black box

What layout editor are you using? mentor IC station lets you to extract the NETS and connectivity database, with that function you can test the connectivity.

 

[shiowjyh]

calibre + box lvs

Have you ever try to delete/exclude that cell instead?

Regards,

 

[jizhongren]

calibre blackbox

Yes, you can delete the block-box cell in layout and netlist.

 

[Hughes]

calibre lvs blackbox soft connection

You may replace the black-box with a dummy cell with some devices (may be as simple as a grounded resistor) connected at the pin.