Skip to main content

Pinout

Note
  • This page lists the pinout of the FLY-Super8 Pro 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 like TMC5160, it serves as the chip select CS. The same pin is multiplexed.
  • EN is the enable pin. In Klipper configuration, it is typically active-low (with ! prefix in enable_pin).
  • 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 noted.
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 wiring harnesses, organize connector wiring, or touch terminals while the power is on.

DIAG and Sensorless Homing

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

  • DRIVER0–6: DIAG is directly connected to the corresponding endstop input port on the MCU (DRIVERn → Endstop port n). There are no DIAG jumper pins on the board, and the DIAG signal always reaches the MCU. To enable 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 adjacent DIAG jumper cap to route the DIAG signal to PF3 (DIAG shared 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 like the TMC5160 use the motherboard's hardware SPI bus. Configure spi_bus: spi1a in the configuration; there is no need to configure MOSI/MISO/SCLK pins separately:

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

Detailed information on software SPI and SPI speed: SPI Configuration Guide

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 / Generic 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 set sensor_type to Generic 3950.

List of built-in sensor_type options in Klipper that can be connected directly and their applicable scenarios: Thermistor Configuration Guide

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 PWM outputs, suitable for servos, fan speed control, etc.:

PinRemark
PC6Servo / BLTouch control
PF8IN / PWM_OUT

BL-Touch​

FunctionPin
Servo signalPC6
Probe signalPC3

EXP Connectors​

EXP Configuration Reminder
  • The EXP headers are commonly used for screens like the Mini12864 or other expansion peripherals.
  • If a pin is already used by SPI, UART, endstop, fan, or other functions, do not configure it again in the EXP peripheral settings.

EXP1​

FunctionPin
EXP1_1PE12
EXP1_2PE13
EXP1_3PB2
EXP1_4PG8
EXP1_5PC14
EXP1_6PC13
EXP1_7PG14
EXP1_8PG13
EXP1_9GND
EXP1_105V

EXP2​

FunctionPin
EXP2_1PA6
EXP2_2PA5
EXP2_3PB7
EXP2_4PA4
EXP2_5PB6
EXP2_6PA7
EXP2_7PG15
EXP2_8RST
EXP2_9GND
EXP2_10NC
Loading...