Labels Milestones
BackPin (http://www.st.com/resource/en/datasheet/stm32f031k6.pdf#page=90), generated with kicad-footprint-generator ipc_noLead_generator.py QFN, 56 Pin (JEDEC MO-153 Var BD https://www.jedec.org/document_search?search_api_views_fulltext=MO-153), generated with kicad-footprint-generator.
- Corner pads; see figure 8.2 of https://www.silabs.com/documents/public/data-sheets/efm8bb1-datasheet.pdf 20-Lead.
- Strip, 1x05, 1.00mm pitch, 2.0mm pin length.