The pin names of the SKR Pro v1.1 in the firmware

SKR Pro v1.1 Pinout Diagram

SKR Pro v1.1
SKR Pro v1.1 Pinout

Known Errors

  • On the UART connector 3.3V is actually 5V
  • On th I2C connector 3.3V is actually 5V

SKR Pro v1.1 and v1.2 Driver Pins in Firmware

Driver pin numbers. They are separated into driver number.

Pin Type 0 1 2 3 4 5
Enable Pins PF_2 PD_7 PC_0 PC_3 PA_3 PF_0
Step Pins PE_9 PE_11 PE_13 PE_14 PD_15 PD_13
Direction Pins PF_1 PE_8 PC_2 PA_0 PE_7 PG_9
UART Pins PC_13 PE_3 PE_1 PD_4 PD_1 PD_6

SKR Pro v1.1 Other Pins in Firmware

If more than one pin name is availble, either name can be used in the firmware (config.g).
If the pins aren’t in the table (due to not having a special name), then the pin itself can be used in the form of PA0, PA.0, PA_0, A0, A.0 or A_0.

Pin Number Pin Name 1 Pin Name 2 PWM Hardware Timer
PA_1 servo0   Timer 2
PA_2 probe   Timer 2
PA_15 X-CS   Timer 2
PB_0 e2heat he2 Timer 3
PB_1 e0heat he0 Timer 3
PB_10 xstop x-stop Timer 2
PB_12 LCD_SS   Timer 2
PB_13 LCD_SCK    
PB_14 LCD_MISO   Timer 12
PB_15 LCD_MOSI   Timer 8
PB_3 E0-CS   Timer 2
PB_8 Y-CS   Timer 10
PB_9 Z-CS   Timer 11
PC_6 wifi4   Timer 8
PC_7 wifi3   Timer 3
PC_8 fan0 fan Timer 8
PD_10 LCD_RS    
PD_11 LCD_EN    
PD_12 bed hbed Timer 4
PD_14 e1heat he1 Timer 4
PE_10 e1stop e1det  
PE_12 ystop y-stop  
PE_15 e0stop e0det  
PE_5 fan1   Timer 9
PE_6 fan2   Timer 9
PF_11 BTN_EN2    
PF_12 LCD_CD    
PF_13 KILL    
PF_14 wifi5    
PF_15 wifi6    
PF_3 e0temp t0  
PF_4 e1temp t1  
PF_5 e2temp t2  
PF_6 bedtemp t3 Timer 10
PG_0 wifi1    
PG_1 wifi2    
PG_10 BTN_EN1    
PG_12 E2-CS    
PG_15 E1-CS    
PG_2 LCD_D4    
PG_3 LCD_D5    
PG_4 BEEP    
PG_5 e2stop e2det  
PG_6 LCD_D6    
PG_7 LCD_D7    
PG_8 zstop z-stop  

Configured SPI connections

The below SPI channels are preconfigured in the firmware.
Where NoPin is present, then that pin is not configured by default.

SPI Channel CLK MISO MOSI Hardware or Software
0 PA_5 PA_6 PA_7 Hardware
1 PB_13 PB_14 PB_15 Hardware
2 PC_10 PC_11 PC_12 Hardware
3 NoPin NoPin NoPin Software
4 NoPin NoPin NoPin Software
5 NoPin NoPin NoPin Software