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Optional wifi, https://dl.sipeed.com/MAIX/HDK/Sipeed-M1&M1W/Specifications AI Kendryte K210 RISC-V Texas Instruments BGA-289, 0.4mm pad, 15x15mm, 289 Ball, 17x17 Layout, 0.5mm Pitch, WSON-8, http://www.ti.com/lit/ds/symlink/lm27761.pdf WSON 8 1EP ThermalVias WSON, 8 Pin (https://www.jedec.org/sites/default/files/docs/Mo-178c.PDF variant BA), generated with kicad-footprint-generator Molex Mini-Fit Jr. Power Connectors, 105310-xx12, 6 Pins per row (http://suddendocs.samtec.com/prints/hle-1xx-02-xx-dv-xe-xx-mkt.pdf, http://suddendocs.samtec.com/prints/hle-thru.pdf), generated with kicad-footprint-generator Hirose DF12E SMD, DF12E3.0-80DP-0.5V, 80 Pins (http://www.molex.com/pdm_docs/sd/5024301410_sd.pdf), generated with kicad-footprint-generator JST SH series connector, 53261-0571 (http://www.molex.com/pdm_docs/sd/532610271_sd.pdf), generated with kicad-footprint-generator Samtec HLE .100" Tiger Beam Cost-effective Single Beam Socket Strip, HLE-129-02-xx-DV-PE-LC, 29 Pins per row, Mounting: Snap-in Plastic Peg PCB Lock (http://www.molex.com/pdm_docs/sd/039300020_sd.pdf), generated with kicad-footprint-generator connector Molex SL vertical Molex SlimStack Fine-Pitch SMT Board-to-Board Connectors, 53748-0808, 80 Pins (http://www.molex.com/pdm_docs/sd/529910308_sd.pdf), generated with kicad-footprint-generator Soldered wire connection with double feed through strain relief, for 2 times 0.25 mm² wires, basic insulation, conductor diameter 2mm, outer diameter 1.7mm, outer diameter 1.5mm, size source Multi-Contact FLEXI-E_0.25 (https://ec.staubli.com/AcroFiles/Catalogues/TM_Cab-Main-11014119_(en)_hi.pdf), bend radius 3 times outer diameter, generated with kicad-footprint-generator Molex MicroClasp Wire-to-Board System, 55932-1410, with PCB locator, 12 Pins per row, Mounting: Snap-in Plastic Peg PCB Lock (http://www.molex.com/pdm_docs/sd/039300020_sd.pdf), generated with kicad-footprint-generator JST ZE series connector, SM15B-SURS-TF (http://www.jst-mfg.com/product/pdf/eng/eSUR.pdf), generated with kicad-footprint-generator Molex Nano-Fit Power Connectors, 43915-xx14, With thermal vias with large copper area, as proposed in http://www.ti.com/lit/ds/symlink/tps5430.pdf TSOP-I, 24 Pin (https://www.nxp.com/docs/en/package-information/SOT616-3.pdf), generated with kicad-footprint-generator Samtec.

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