open-earable-exg-factsheet

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open-earable-exg-factsheet [2026/06/11 16:30] – [What you need] fabricioopen-earable-exg-factsheet [2026/06/11 16:31] (current) – [Firmware] fabricio
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 The Zephyr side needs a second SPI controller (SPIM2) mapped to these four  pins with an SD-over-SPI slot on it — the same stack already proven on the The Zephyr side needs a second SPI controller (SPIM2) mapped to these four  pins with an SD-over-SPI slot on it — the same stack already proven on the
-  internal slot (''bringup/test_sd_cs17''). See the board devicetree and +internal slot (''bringup/test_sd_cs17''). See the board devicetree and 
-  ''HARDWARE.md'' in the firmware repo for the authoritative pin map.+''HARDWARE.md'' in the firmware repo for the authoritative pin map.
  
 One thing to double-check against your physical board before crimping: the pin-1 orientation of P1 and J2 (silk dot/triangle) — the netlist gives pin One thing to double-check against your physical board before crimping: the pin-1 orientation of P1 and J2 (silk dot/triangle) — the netlist gives pin
 numbers but not how the footprint is rotated on your board revision. A multimeter continuity check from J2.2/P1.3 to any GND point (e.g., USB shield) numbers but not how the footprint is rotated on your board revision. A multimeter continuity check from J2.2/P1.3 to any GND point (e.g., USB shield)
 confirms you've got the orientation right before anything gets power. confirms you've got the orientation right before anything gets power.
  • open-earable-exg-factsheet.txt
  • Last modified: 2026/06/11 16:31
  • by fabricio