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Pin Distribution

Note
  • This page lists the pin distribution of the FLY-Super5 motherboard after flashing Klipper firmware. Pin numbers are based on the motherboard schematic.
  • UART/CS is the driver communication pin: when using TMC2209, it functions as UART; when using SPI drivers such as TMC5160, it functions as chip select CS. The same pin is multiplexed.
  • EN is the enable pin, typically active-low (enable_pin with ! prefix) in Klipper configurations.
  • DIAG is the driver diagnostic signal pin. When using sensorless homing, configure the corresponding diag_pin according to the table below.
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Driver Pins​

The FLY-Super5 provides 5 driver ports:

DriverSTEPDIRENUART/CSDIAG
DRIVER0PE14PE15PB11PB10PB7
DRIVER1PE11PE12PE13PE10PC13
DRIVER2PE7PE8PE9PA4PC7
DRIVER3PE4PE5PC1PC0PC14
DRIVER4PE1PE2PE3PE0PC6
Power Off Before Operation

Before starting, completely power off the printer and disconnect the power supply. Do not plug or unplug wiring harnesses, arrange interface cable sequences, or touch terminals while the printer is powered on.

DIAG and Sensorless Homing

When using sensorless homing, the driver chip outputs a stall detection signal through the DIAG pin, and Klipper needs to read this signal through the corresponding input port. The correspondence between DIAG and endstop ports on this motherboard is as follows:

  • DRIVER0–4: DIAG is directly connected to the corresponding endstop input port on the main controller (DRIVERn → endstop port n). There are no DIAG jumper pins on the board, so the DIAG signal is always delivered to the main controller. When enabling sensorless homing, simply configure the corresponding endstop port pin as diag_pin. Do not connect a physical endstop switch to that endstop port.

After enabling sensorless homing, the corresponding endstop port is occupied by the DIAG signal, and mechanical or optical endstop switches must not be connected simultaneously.

SPI Bus​

SPI drivers such as the TMC5160 use the motherboard's hardware SPI bus. Configure spi_bus: spi1a in the configuration; there is no need to separately configure MOSI/MISO/SCLK pins:

[tmc5160 stepper_x]
spi_bus: spi1a
cs_pin: Corresponding driver's UART/CS pin

Detailed instructions on software SPI and SPI speed: SPI Configuration Method

Endstops and Probe​

FunctionPinCorresponding Driver DIAG
Endstop Port 0 / IO0PB7DRIVER0
Endstop Port 1 / IO1PC13DRIVER1
Endstop Port 2 / IO2PC7DRIVER2
Endstop Port 3 / IO3PC14DRIVER3
Endstop Port 4 / IO4PC6DRIVER4
Endstop Port 5 / IO5PC15-
ProbePC2-

Heating​

FunctionPin
Heated Bed HeaterPB0
Heater Port 0PD12
Heater Port 1PD13

Temperature Sensors​

FunctionPin
Heated Bed ThermistorPB1
Thermistor Port 0PC4
Thermistor Port 1PC5
Supported Thermistor Types

The thermistor ports support NTC thermistors (100K) by default. The recommended sensor_type configuration is Generic 3950.

List of built-in sensor_type options in Klipper and their applicable scenarios: Thermistor Configuration Method

K-type thermocouples, PT100, etc., require additional conversion chips and cannot be directly connected to the thermistor ports.

Fans​

FunctionPin
Fan Port 0PA0
Fan Port 1PA1
Fan Port 2PA2
Fan Port 3PA3

PWM​

The FLY-Super5 provides 2 PWM output channels, which can be used for servos, fan speed control, etc.:

PinNote
PB2IN / PWM_OUT
PE6Servo / BLTouch Control

BL-Touch​

FunctionPin
Servo SignalPE6
Probe SignalPC2
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