Pinout
- This page lists the pinout of the FLY-C5 motherboard after flashing Klipper firmware. Pin numbers are based on the motherboard schematic.
UART/CSis the driver communication pin: used as UART with TMC2209, used as chip selectCSwith SPI drivers such as TMC5160. The pin is multiplexed for both functions.ENis the enable pin. In Klipper configuration, it is typically active low (prefix theenable_pinwith!).DIAGis the driver diagnostic signal pin. When using sensorless homing, configure the correspondingdiag_pinaccording to the table below.
Driver Pins
The FLY-C5 provides 5 driver ports:
| Driver | STEP | DIR | EN | UART/CS | DIAG |
|---|---|---|---|---|---|
| DRIVER0 | PD1 | PD0 | PD3 | PA15 | PC7 |
| DRIVER1 | PD6 | PD5 | PD7 | PD4 | PA8 |
| DRIVER2 | PE1 | PE0 | PE2 | PB7 | PB6 |
| DRIVER3 | PE5 | PE4 | PE6 | PE3 | PC1 |
| DRIVER4 | PC15 | PC14 | PC0 | PC13 | PC2 |
Before starting, completely shut down the printer and disconnect the power supply. Do not plug or unplug wiring harnesses, organize interface wiring, or touch terminals while the printer is powered on.
The DIAG signals for DRIVER0–4 are independently connected to the main controller. When using sensorless homing, configure the corresponding driver's diag_pin according to the DIAG row in the table above. These DIAG pins do not occupy the regular endstop ports listed above. The regular endstop ports can still be used as mechanical endstops or inputs based on your actual wiring.
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 configure the MOSI/MISO/SCLK pins separately:
[tmc5160 stepper_x]
spi_bus: spi1a
cs_pin: UART/CS pin of the corresponding driver
Detailed explanation of software SPI, SPI speed, etc.: SPI Configuration Method
Endstops and Probe
| Function | Pin | Corresponding Driver DIAG |
|---|---|---|
| Endstop port 0 / IO0 | PE9 | - |
| Endstop port 1 / IO1 | PE10 | - |
| Endstop port 2 / IO2 | PE11 | - |
| Endstop port 3 / IO3 | PE12 | - |
| Endstop port 4 / IO4 | PE13 | - |
| Endstop port 5 / IO5 | PE14 | - |
| DIAG | PC7 | DRIVER0 |
| DIAG | PA8 | DRIVER1 |
| DIAG | PB6 | DRIVER2 |
| DIAG | PC1 | DRIVER3 |
| DIAG | PC2 | DRIVER4 |
| Probe | PC5 | - |
Heaters
| Function | Pin |
|---|---|
| Heated Bed | PA0 |
| Heater Port 0 | PA6 |
| Heater Port 1 | PC6 |
Temperature Sensors
| Function | Pin |
|---|---|
| Bed Thermistor | PA3 |
| Thermistor Port 0 | PA4 |
| Thermistor Port 1 | PA1 |
The thermistor ports support NTC thermistors (100K) by default. The recommended sensor_type configuration is Generic 3950.
List of built-in
sensor_typeoptions that can be directly connected to Klipper and their applicable scenarios: Thermistor Configuration Method
K-type thermocouples, PT100, etc., require additional signal conversion chips and cannot be directly connected to the thermistor ports.
Fans
| Function | Pin |
|---|---|
| Fan Port 0 | PD15 |
| Fan Port 1 | PD14 |
| Fan Port 2 | PD13 |
| Fan Port 3 | PD12 |
PWM
The FLY-C5 provides 3 PWM output channels, which can be used for servos, fan speed control, etc.:
| Pin | Notes |
|---|---|
| PB0 | Servo / BLTouch control |
| PB10 | RGB / Neopixel |
| PE15 | RGB / Neopixel |
BL-Touch
| Function | Pin |
|---|---|
| Servo Signal | PB0 |
| Probe Signal | PC5 |
RGB
| Function | Pin |
|---|---|
| RGB0 / Neopixel | PB10 |
| RGB1 / Neopixel | PE15 |
Screen / EXP Notes
The FLY-C5 does not provide standard EXP1 / EXP2 12864 pin headers. Please use the board's TFT, FPC HDMI, HDMI, or UART screen interfaces. Do not apply the EXP1 / EXP2 pinout from other motherboards.
| Interface | Pin / Description |
|---|---|
| UART Screen Interface | PA10 / PA9 / GND / 5V |
| TFT Screen Interface | FPC all-in-one interface |
| HDMI Screen Interface | HDMI / FPC HDMI |
Screen Wiring and Configuration: View FLY-C5 Screen Documentation