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Virtex-7 BGA, 34x34 grid, 35x35mm package, 1mm pitch; https://www.xilinx.com/support/documentation/user_guides/ug475_7Series_Pkg_Pinout.pdf#page=299, NSMD pad definition Appendix A BGA 1924 1 FL1925 FLG1925 FL1926 FLG1926 FL1928 FLG1928 FL1930 FLG1930 Artix-7 BGA, 19x19 grid, 10x10mm package, pitch 0.35mm; see section 7.2 of http://www.st.com/resource/en/datasheet/stm32f207vg.pdf.

A solid square wave. Easiest bodge.
Main *-backups Forget (and ignore) fp-info-cache.
Href="https://gitea.circuitlocution.com/synth_mages/MK_VCO/pulls/5">synth_mages/MK_VCO#5 Add jlc constraints DRC; replace order number.

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