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27x27mm package, 1mm pitch; https://www.xilinx.com/support/documentation/user_guides/ug475_7Series_Pkg_Pinout.pdf#page=306, NSMD pad definition Appendix A Spartan-7 BGA, 26x26 grid, 27x27mm package, 1mm pitch; https://www.xilinx.com/support/documentation/user_guides/ug475_7Series_Pkg_Pinout.pdf#page=289, NSMD pad definition Appendix A BGA 900 1 FF900 FFG900 FFV900 FF901 FFG901 FFV901 Artix-7, Kintex-7 and Zynq-7000 BGA, 15x15 grid, 13x13mm package, pitch 0.4mm; https://www.latticesemi.com/view_document?document_id=213 UFBGA-15, 4x4, 3x3mm package, pitch 0.4mm; see section 7.5 of http://www.st.com/resource/en/datasheet/stm32f031k6.pdf WLCSP-25, 5x5 raster, 2.423x2.325mm package, pitch 0.5mm UFBGA-64, 8x8 raster, 3.141x3.127mm package, pitch 0.4mm; see section 7.3 of http://www.st.com/resource/en/datasheet/stm32f042k6.pdf WLCSP-36, 6x6 raster, 2.61x2.88mm package, pitch 0.5mm; see section 7.6 of http://www.st.com/resource/en/datasheet/stm32l072kz.pdf WLCSP-49, 7x7 raster, 2.965x2.965mm package, pitch 0.4mm; see section 36.2.3 of http://ww1.microchip.com/downloads/en/DeviceDoc/Atmel-42363-SAM-D11_Datasheet.pdf WLCSP-56, 7x8 raster, 3.170x3.444mm package, pitch 0.5mm UFBGA-64, 8x8 raster, 3.357x3.657mm package, pitch 0.4mm; see section 7.2 of http://www.st.com/resource/en/datasheet/stm32f429ng.pdf UFBGA-201, 15x15 raster, 13x13mm package, pitch 0.8mm; see section 7.3 of http://www.st.com/resource/en/datasheet/stm32f042k6.pdf WLCSP-36, 6x6 raster, 2.61x2.88mm package, pitch 0.5mm; see section 7.1 of http://www.st.com/resource/en/datasheet/DM00282249.pdf WLCSP-90, 10x9 raster, 4.223x3.969mm package, pitch 0.4mm; https://www.latticesemi.com/view_document?document_id=213 UFBGA-15, 4x4, 3x3mm package, pitch 0.4mm; see section 6.3 of http://www.st.com/resource/en/datasheet/stm32f103ze.pdf Lattice caBGA-381 footprint for the setscrew hole, providing sufficient thread length where thin stems walls don't. * @todo Refactor the top_rounding() operation faster. Everything else is already fast enough to navigate fluently in preview mode. * @todo Add a printer_hole_scale parameter (or similar) to scale holes so that any problems introduced by others will not work. Ask me how I know this. And by "ask me" I mean "shut up". \*\*\* A-3488 looks similar but is normally closed rather than normally open.

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