Skip to main content

Pin Mapping

Note
  • This page lists the pin mapping of the FLY-Super8 Pro motherboard after flashing Klipper firmware. The pin numbers are based on the motherboard schematic.
  • UART/CS is the driver communication pin: when using TMC2209, it serves as UART; when using SPI drivers such as TMC5160, it serves as chip select CS. The same pin is shared for both functions.
  • EN is the enable pin, which is typically active-low in Klipper configuration (enable_pin with a ! prefix).
  • DIAG is the driver diagnostic signal pin. When using sensorless homing, configure the corresponding diag_pin according to the table below; some drivers may still require setting the DIAG jumper as instructed.
Loading...

Driver Pins​

The FLY-Super8 Pro provides 8 driver ports:

DriverSTEPDIRENUART/CSDIAG
DRIVER0PE2PC5PF11PC4PG12
DRIVER1PE3PF13PF14PF12PG11
DRIVER2PE4PG0PG1PF15PG10
DRIVER3PE14PE8PE9PE7PG9
DRIVER4PE15PE11PF2PE10PD7
DRIVER5PE1PF0PC15PF1PD6
DRIVER6PE0PG3PG4PG2PA8
DRIVER7PE6PG6PG7PG5PF3
Power Off Required

Before starting, completely shut down the printer and disconnect the power supply. Do not plug or unplug cables, arrange wiring, or touch terminals while the power is on.

DIAG and Sensorless Homing

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

  • DRIVER0–6: 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; the DIAG signal always reaches 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 this endstop port.
  • DRIVER7: DIAG is not directly connected to an endstop port. You must manually install the DIAG jumper cap next to it to route the DIAG signal to PF3 (the DIAG multiplexed pin) before sensorless homing can be used.

Once sensorless homing is enabled, the corresponding endstop port is occupied by the DIAG signal and must not be connected to a mechanical or optical endstop switch simultaneously.

SPI Bus​

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

[tmc5160 stepper_x]
spi_bus: spi1a
cs_pin: UART/CS pin of the corresponding driver

Detailed explanation of software SPI and SPI speed: SPI Configuration Method

Endstops and Probe​

FunctionPinCorresponding Driver DIAG
Endstop port 0 / IO0PG12DRIVER0
Endstop port 1 / IO1PG11DRIVER1
Endstop port 2 / IO2PG10DRIVER2
Endstop port 3 / IO3PG9DRIVER3
Endstop port 4 / IO4PD7DRIVER4
Endstop port 5 / IO5PD6DRIVER5
Endstop port 6 / IO6PA8DRIVER6
HV-IN / General purpose inputPF3DRIVER7
IN / PWM_OUTPF8-
ProbePC3-

Heaters​

FunctionPin
Heated bedPE5
Heater port 0PB0
Heater port 1PB1
Heater port 2PC7
Heater port 3PF7
Heater port 4PF6

Temperature Sensors​

FunctionPin
Thermistor port 0PF4
Thermistor port 1PF5
Thermistor port 2PF9
Thermistor port 3PF10
Thermistor port 4PC0
Thermistor port 5PC1
Supported Thermistor Types

The thermistor ports support NTC thermistors (100K) by default. It is recommended to configure sensor_type as Generic 3950.

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

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

Fans​

FunctionPin
Fan port 0PA0
Fan port 1PA1
Fan port 2PA2
Fan port 3PA3
Fan port 4PA15
Fan port 5PB11
Fan port 6PB10
Fan port 7PD12
Fan port 8PD14
Fan port 9PD15

PWM​

The FLY-Super8 Pro provides 2 channels of PWM output, which can be used for servos, fan speed control, etc.:

PinRemarks
PC6Servo / BLTouch control
PF8IN / PWM_OUT

BL-Touch​

FunctionPin
Servo signalPC6
Probe signalPC3
Loading...