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The issue in checkDesign report

Greatrebel

 Hi All,

 I got some issues in checkDesign report. Firstly, in Top level Floorplan Check, I saw three iterms FALSE: Placement grid on Mfg. grid, User grid a multiple of Mfg. grid, and User grid a multiple of Mfg. grid. I do not know what these mean? Are they really important warnings. 

 Secondly,there are a few cells whose dimensions are not interger multiple of their site, so I got Cell dimension multiple of Site report.

I am wondering whether the dimension issue is important or not?

 

Thanks in advance

 

Parents

  •  You can ignore those first 3 FALSE items. It's normal for the placement grid to be much wider than the manufacturing grid, and you probably don't have a user grid defined (also completely normal).

    I would be concerned though about the cells with dimensions not a multiple of the site. Are these cells actually going to be used in your design? Do they need a different SITE than your other cells, that maybe is not defined? Double-check the SITE statment in the LEF of these cells, as well as the SITE definitions in your tech LEF.

Reply

  •  You can ignore those first 3 FALSE items. It's normal for the placement grid to be much wider than the manufacturing grid, and you probably don't have a user grid defined (also completely normal).

    I would be concerned though about the cells with dimensions not a multiple of the site. Are these cells actually going to be used in your design? Do they need a different SITE than your other cells, that maybe is not defined? Double-check the SITE statment in the LEF of these cells, as well as the SITE definitions in your tech LEF.

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