3v3 [] [] VBUS (5v) Limit Z PF2 [] [] GND
PB5 [] [] GND Limit Y PF3 [] [] PB2 Spindle PWM
UART2 RX/GPIO4 PB0 [] [] PD0 Reset PB3 [] [] PE0 Limit X
UART2 TX/GPIO5 PB1 [] [] PD1 Step X Safety Door PC4 [] [] PF0 Stepper disable Z
Keypad strobe/GPIO6 PE4 [] [] PD2 Step Y Feed Hold PC5 [] [] RST
PE5 [] [] PD3 Step Z Cycle Start PC6 [] [] PB7 Dir X
Dir Z PB4 [] [] PE1 Stepper disable XY PC7 [] [] PB6 Dir Y
Probe PA5 [] [] PE2 Spindle enable Flood PD6 [] [] PA4 GPIO1
I2CSCL PA6 [] [] PE3 Spindle direction Mist PD7 [] [] PA3 GPIO2
I2CSDA PA7 [] [] PF1 RTS/GPIO0 PF4 [] [] PA2 GPIO3
NOTE: Remove R9 and R10!
With shorts - Limit X (R10): PE0 -> PF1, Reset (R11): PB3 -> PC7
3v3 [] [] VBUS (5v) Limit Z PF1 [] [] GND
PE4 [] [] GND Limit Y PF2 [] [] PM3 Spindle PWM
UART7 RX/GPIO4 PC4 [] [] PE0 Reset PF3 [] [] PH2 Limit X
UART7 TX/GPIO5 PC5 [] [] PE1 Step X Safety Door PG0 [] [] PH3 Stepper disable Z
Keypad strobe/GPIO6 PC6 [] [] PE2 Step Y Feed Hold PL4 [] [] RST
PE5 [] [] PE3 Step Z Cycle Start PL5 [] [] PD1 Dir X
Dir Z PD3 [] [] PD7 Stepper disable XY PL0 [] [] PD0 Dir Y
Probe PC7 [] [] PA6 Spindle enable Flood PL1 [] [] PN2 GPIO1
I2CSCL PB2 [] [] PM4 Spindle direction Mist PL2 [] [] PN3 GPIO2
I2CSDA PB3 [] [] PM5 RTS/GPIO0 PL3 [] [] PP3 GPIO3
3v3 [] [] VBUS (5v) Limit Z PG1 [] [] GND
PD2 [] [] GND Limit Y PK4 [] [] PM7 Spindle PWM
UART6 RX/GPIO4 PP0 [] [] PB4 Reset PK5 [] [] PP5 Limit X
UART6 TX/GPIO5 PP1 [] [] PB5 Step X Safety Door PM0 [] [] PA7 Stepper disable Z
Keypad strobe/GPIO6 PD4 [] [] PK0 Step Y Feed Hold PM1 [] [] RST
PD5 [] [] PK1 Step Z Cycle Start PM2 [] [] PQ2 Dir X
Dir Z PQ0 [] [] PK2 Stepper disable XY PH0 [] [] PQ3 Dir Y
Probe PP4 [] [] PK3 Spindle enable Flood PH1 [] [] PP3 GPIO1
I2CSCL PN5 [] [] PA4 Spindle direction Mist PK6 [] [] PQ1 GPIO2
I2CSDA PN4 [] [] PA5 RTS/GPIO0 PK7 [] [] PM6 GPIO3
3v3 [] [] VBUS (5v) Limit Z P2.5 [] [] GND
P6.5 [] [] GND Limit Y P2.4 [] [] P2.0 Spindle PWM
UART2 RX/GPIO4 P3.4 [] [] P6.0 Reset P1.5 [] [] P2.2 Limit X
UART2 TX/GPIO5 P3.3 [] [] P6.1 Step X Safety Door P1.4 [] [] P7.4 Stepper disable Z
Keypad strobe/GPIO6 P1.6 [] [] P6.2 Step Y Feed Hold P1.3 [] [] RST
P6.6 [] [] P6.3 Step Z Cycle Start P1.2 [] [] P3.0 Dir X
Dir Z P3.2 [] [] P6.4 Stepper disable XY P4.3 [] [] P3.1 Dir Y
Probe P2.7 [] [] P7.0 Spindle enable Flood P4.0 [] [] P2.6 GPIO1
I2CSCL P4.2 [] [] P3.6 Spindle direction Mist P3.7 [] [] P2.3 GPIO2
I2CSDA P4.1 [] [] P3.5 RTS/GPIO0 P8.2 [] [] P8.1 GPIO3
3v3 [] [] VBUS (5v) Limit Z P2.7 [] [] GND
P6.0 [] [] GND Limit Y P2.6 [] [] P2.5 Spindle PWM
UART2 RX/GPIO4 P3.2 [] [] P6.1 Reset P2.4 [] [] P3.0 Limit X
UART2 TX/GPIO5 P3.3 [] [] P4.0 Step X Safety Door P5.6 [] [] P5.7 Stepper disable Z
Keypad strobe/GPIO6 P4.1 [] [] P4.2 Step Y Feed Hold P6.6 [] [] RST
P4.3 [] [] P4.4 Step Z Cycle Start P6.7 [] [] P1.6 Dir X
Dir Z P1.5 [] [] P4.5 Stepper disable XY P2.3 [] [] P1.7 Dir Y
Probe P4.6 [] [] P4.7 Spindle enable Flood P5.1 [] [] P5.0 GPIO1
I2CSCL P6.5 [] [] P5.4 Spindle direction Mist P3.5 [] [] P5.2 GPIO2
I2CSDA P6.4 [] [] P5.5 RTS/GPIO0 P3.7 [] [] P3.6 GPIO3
With shorts - Reset (R12): P2.4 -> P6.0, Safety Door (R13): P5.6 -> P6.1, Limit X (R14): P3.0 -> P2.3
MS1 MS2 MS3 Microstep resolution
Low Low Low Full step
High Low Low Half step
Low High Low Quarter step
High High Low Eighth step
High High High Sixteenth step
https://www.pololu.com/product/1182
MS1 MS2 MS3 Microstep resolution
Low Low Low Full step
High Low Low Half step
Low High Low 1/4 step
High High Low 1/8 step
Low Low High 1/16 step
High Low High 1/32 step
Low High High 1/32 step
High High High 1/32 step