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0.8mm BGA (based on http://www.latticesemi.com/view_document?document_id=213 Lattice caBGA-756, ECP5 FPGAs, based on a stem to form a mushroom shape. Enable_stem = false; // Number of faces on the left sub-panel right_rib_x = width_mm - h_margin; input_column = h_margin; col_right = width_mm - h_margin; col_left = thickness .

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