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AbstractBlockageCoverLayers on not flatten memory instance

samung
Hello,

I would like to understand better the AbstractBlockageCoverLayers function in Abstract generator Tool, step Abstract (Blockage).

absSetBinOption("Core" "AbstractBlockageCoverLayers" "M1 M2X M3X ")


Actually, I would like to define some blockages, let's say I have my "memory instance" layout up to MX, so it means the vdd/vss are in MX, but there are some layers from M1 to MX-1 in the "memory instance". 
The access pins are located at the edges of the "memory instance".

I would like to generate an ABSTRACT view as follow : "cover blockage" for M1 to MX-1 and "Detailed Blocakge" for MX.


When I generate the ABSTRACT view, I just have : the MX layer, I don't have the other Metal cover layers.

My input : the "memory instance" layout up to MX (meaning that with Virtuoso Layout Eiditng, i see all the metal layers), but the "memory instance" is not flatten (meaning that it is made of different cells : array_blxxx cell, master control cell ...).


So, do I have to do a flatten of all the "memory instance" cells to be able to generate the different metal cover layers in the ABSTRACT view or is there another way ?

Thanks !!

P.
 
PS :
 
tool version : IC6.1.5-64b.500.9
xxx/cadence_amsams2010.2c_mmsim/lnx/tools/dfII/bin/abstract 
Parents

  •  Hi,

    The abstract view must have all the information, otherwise you would not have got the correct results in the LEF.

    I cannot explain why the cover blockages are not there.

    But, just to check if they really are there, or not.......

    Check that the colors/stipples for the M1, M2X blockages  have some useful color patterns. (It may be just a visual thing)

    Or, click File->summary and check the statistics:

     

    You should see something like this:

     ***********************************************************************************************************

                                   Blockage Object Statistics
    ***********************************************************************************************************


    Total number of Blockage Objects    :     7

        Placement Area Blockage Objects    :     0

        Placement Area Halo Objects    :     0

        Layer Blockage Objects        :     7

        Layer Halo Blockage Objects    :     0

        Consolidated Layer and Layer Halo Blockage Object details

        --------------------------------------------------------------------------
        Layer      Routing  Fill  Slot  Pin  Feedthru  Screen  Total
        --------------------------------------------------------------------------
        Metal1           7     0     0    0         0       0      7
        --------------------------------------------------------------------------
        Total            7     0     0    0         0       0      7
        --------------------------------------------------------------------------

     

     

    If this is empty, I have no further ideas what can be wrong.

    Then I would suggest you contact customer support.

     

    Colin

Reply

  •  Hi,

    The abstract view must have all the information, otherwise you would not have got the correct results in the LEF.

    I cannot explain why the cover blockages are not there.

    But, just to check if they really are there, or not.......

    Check that the colors/stipples for the M1, M2X blockages  have some useful color patterns. (It may be just a visual thing)

    Or, click File->summary and check the statistics:

     

    You should see something like this:

     ***********************************************************************************************************

                                   Blockage Object Statistics
    ***********************************************************************************************************


    Total number of Blockage Objects    :     7

        Placement Area Blockage Objects    :     0

        Placement Area Halo Objects    :     0

        Layer Blockage Objects        :     7

        Layer Halo Blockage Objects    :     0

        Consolidated Layer and Layer Halo Blockage Object details

        --------------------------------------------------------------------------
        Layer      Routing  Fill  Slot  Pin  Feedthru  Screen  Total
        --------------------------------------------------------------------------
        Metal1           7     0     0    0         0       0      7
        --------------------------------------------------------------------------
        Total            7     0     0    0         0       0      7
        --------------------------------------------------------------------------

     

     

    If this is empty, I have no further ideas what can be wrong.

    Then I would suggest you contact customer support.

     

    Colin

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