Pinout

SCE2-M module has some STM32 pins routed to external pads. Pads grouped by functionality provided in tables below.

Pinout

GPIO pin mapping table

IO pin

CPU port

Function

CPU features

1

PB1

SPINDLE ENABLE

ADC

2

PB9

PROBE

I2C SDA

3

PA8

PWM OUTPUT

4

PB4

FLOOD

5

PB3

MIST

6

PB0

SPINDLE DIR

ADC

7

PB5

STOP

8

PB8

I2C SCL

PA8 (PWM OUTPUT) is set to 10kHz frequency, but can be adjusted in firmware.

Limit switch mapping table

Port

Net name

PB12

LIMIT1

PB13

LIMIT2

PB14

LIMIT3

PB15

LIMIT4

PA9

LIMIT_EN

UART pin mapping table

CPU port

Net name

PB7

USART1_RX

PB6

USART1_TX

Schematic symbol

5V is used for motor drivers. Logic level of all GPIO pins is 3.3V