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DOUT20 STEPPER0_UART_TX or STEPPER0_SPI_CS or STEPPER0_MSTEP0 DOUT21 STEPPER1_UART_TX or STEPPER1_SPI_CS or STEPPER1_MSTEP0 DOUT22 STEPPER2_UART_TX or STEPPER2_SPI_CS or STEPPER2_MSTEP0 DOUT23 ...
The Adafruit Feather M4 Express is a compact, lightweight ARM development board with an onboard mini NeoPixel, 2 MiB of SPI flash, charging status indicator and user LEDs, USB connector, 21 GPIO pins ...