Datasheet

SRAM CS to Pin D6
EINK CS to Pin D9
EINK DC to Pin D10
If you do not plan to use the SD card, you can cut the trace to SD CS. Likewise for SRAM CS.
The Reset pin for the E-Ink display is connected to an auto-reset circuit and also to the Feather Reset pin, so it will
reset when you press the reset button.
The Busy pin is available on a breakout pad, you can solder it to a wire and connect to a pin if you need it - we figure
most people will just use a fixed delay.
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