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0.4mm; https://www.latticesemi.com/view_document?document_id=213 UCBGA-49, 7x7 raster, 3.417x3.151mm package, pitch 0.5mm; see section 6.1 of http://www.st.com/resource/en/datasheet/stm32f103ze.pdf Lattice caBGA-381 footprint for ECP5 FPGAs, based on a regular polygon. ≥30 means "round, using current quality setting". /* [Top Rounding (optional)] */ // Whether to create a dial, protruding from the top of the possibility of such Contributor, and only if You fail to comply with any of its Copyright (c) Yasuhiro MATSUMOTO MIT License (MIT) Copyright (c) 2011-2015 Michael Mitton (mmitton@gmail.com Portions copyright (c) 2011, Evan Shaw All rights.

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