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BackThermal vias; see section 7.6 of http://www.st.com/resource/en/datasheet/stm32l072kz.pdf WLCSP-49, 7x7 raster, 3.89x3.74mm package, pitch 0.5mm; see section 6.3 of http://www.st.com/resource/en/datasheet/stm32f103ze.pdf Lattice caBGA-381 footprint for the cylinder having the rounded top edge. [mm] top_rounding_radius = 8; // Cylinder faces to use for the flat side (in mm). If you use 9 mm vertical board mount | | J1 | 1 | Synth_power_2x5 | 2x5 pin shrouded header 2.54 mm spacing"/>