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encounter -error while loading design

gops
**ERROR: (SOCLF-82): Macro "DFSECP1" obs coordinate y value 9.0740 isn't on manufacturing grid. It's likely result in placement/routing that can't be manufactured How could i solve this error?
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  •  Hi Gops,

     The placement grid is not the same as the manufacturing grid. The placement grid is the smallest step size of the std cell rows. If you look at your tech LEF at the definition for the std cell row, the first number in the SIZE line tells you the placement grid. That means that your smallest filler cell should be that size. On the "All Colors" form, under the "View Only" tab, you can turn on the placement grid. You may have to zoom in really close to see it. In the Design->Preferences menu, on the Floorplan tab, there are settings for which grid to snap to for various floorplan objects. The defaults are good settings.

    There are also routing grids. These are the pitches for each metal layer as defined in the LEF. You can turn these on from the same place you turned on the placement grid. Also, when editing wires (hit "e" to make the Edit Route form come up), look at the "Snap" tab. You can turn on or off snapping to routing grids, also called routing tracks. Even if you turn these off, the wires should still be legal on the manufacturing grid.

    Hope that clears up the subject of grids a little bit!

    - Kari 

Reply

  •  Hi Gops,

     The placement grid is not the same as the manufacturing grid. The placement grid is the smallest step size of the std cell rows. If you look at your tech LEF at the definition for the std cell row, the first number in the SIZE line tells you the placement grid. That means that your smallest filler cell should be that size. On the "All Colors" form, under the "View Only" tab, you can turn on the placement grid. You may have to zoom in really close to see it. In the Design->Preferences menu, on the Floorplan tab, there are settings for which grid to snap to for various floorplan objects. The defaults are good settings.

    There are also routing grids. These are the pitches for each metal layer as defined in the LEF. You can turn these on from the same place you turned on the placement grid. Also, when editing wires (hit "e" to make the Edit Route form come up), look at the "Snap" tab. You can turn on or off snapping to routing grids, also called routing tracks. Even if you turn these off, the wires should still be legal on the manufacturing grid.

    Hope that clears up the subject of grids a little bit!

    - Kari 

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