Pinout

Note

• This page lists the pinout of the FLY-ERCF tool board after flashing Klipper firmware. Pin numbers are subject to the product schematic.
• UART/CS is the driver communication pin: it functions as UART when using TMC2209, and as chip select CS when using SPI drivers, with the same pin being multiplexed.
• EN is the enable pin, which is typically active low in Klipper configuration (with the enable_pin prefixed by !).

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Driver Pins

Driver	STEP	DIR	EN	UART/CS	Endstop
DRIVER0	gpio2	gpio1	gpio3	gpio0	-
DRIVER1	gpio7	gpio8	gpio6	gpio9	-

Endstops

Function	Pin
Endstop Port 0	gpio20
Endstop Port 1	gpio15

Servo

Function	Pin
Servo 0	gpio21

Extended Output

Function	Pin
EXTRA / General Purpose Output	gpio14

PWM

PWM Function	Pin
Servo 0	gpio21
EXTRA / General Purpose Output	gpio14