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 Why Assura extract 2 more pins for each standard cell? 

Last post Tue, Mar 27 2012 10:51 PM by laowang. 0 replies.
Started by laowang 27 Mar 2012 10:51 PM. Topic has 0 replies and 2198 views
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  • Tue, Mar 27 2012 10:51 PM

    • laowang
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    • Joined on Tue, Mar 27 2012
    • Posts 1
    • Points 5
    Why Assura extract 2 more pins for each standard cell? Reply

    Hi Guys,

    I got a problem when I did blackbox LVS. The reported issue is "pin mismatch" for each standard cell. For example, cell CLKINVX12 has 4 pins in schematic (A Y VDD VSS), but in layout netlist Assura extracts 6 pins (A Y VDD VSS avC5 avS10). In the standard cell layout, I only can see 4 labels (A Y VDD VSS). Is there any idea about this?

     The procedure I am using is like this:

    1, Done PnR in Encounter

    2, Dump GDS data from Encounter with map file where I output pin name for each standard cell: "NAME  METAL1/LEFPIN   131   0", also I use the option: "Write abstract information for LEF Macros" in GDS Export form

    3, StreamIn GDS data into Virtuoso with default setting. In the layout, only metal1 and pin's lable (metal1/pn) are in standard cells. (The vendor doesn't provide us standard cell's gds data.)

    4, Run Assura LVS. I use blackbox rather than blackboxcell, because I can't find "pinlayer" definition in the extract rule.

    Do I miss anything in the flow? Thanks a lot.

    • Post Points: 5
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Started by laowang at 27 Mar 2012 10:51 PM. Topic has 0 replies.