STM32‐Alpha board Pin Out - johnttaylor/epc GitHub Wiki
CN7 Header
| Header Pin# | MCU Pin | Type | Function |
|---|---|---|---|
| 2 | PB8 | out | PWM LCD Backlight |
| 4 | PB9 | out | PWM RGB-LED: RED |
| 6 | --- | --- | not-used (because the default solder-bridge ties AVref to VDD). |
| 8 | --- | GND | Ground |
| 10 | PA5 | out | SCLK for the LCD Controller |
| 12 | PA6 | out | CS for the LCD Controller |
| 14 | PA7 | in | MOSI for the LCD Controller |
| 16 | PD14 | out | PWM RGB-LED: GREEN |
| 18 | PD15 | out | PWM RGB-LED: BLUE |
| 20 | PF12 | out | DC for the LCD Controller |
CN10 Header
| Header Pin# | MCU Pin | Type | Function |
|---|---|---|---|
| 2 | PF13 | in | Input Button A (asserted:=0V) |
| 4 | PE9 | in | Input Button B (asserted:=0V) |
| 6 | PF11 | in | Input Button X (asserted:=0V) |
| 8 | PF14 | in | Input Button Y (asserted:=0V) |
| 10 | --- | --- | not-used |
| 12 | PF13 | out | Reset LCD Controller |
| 19 | PD13 | out | Fan PWM |
| 21 | PD12 | out | Heater PWM |
| 23 | PD11 | in | HW Safety Limit Tripped (asserted:=0V) |
CN8 Header
| Header Pin# | MCU Pin | Type | Function |
|---|---|---|---|
| 4 | --- | PWR | 3.3V |
| 5 | --- | PWR | 5V |
CN9 Header
| Header Pin# | MCU Pin | Type | Function |
|---|---|---|---|
| 1 | PA3 | ain | thermistor |
| 19 | PF1 | out | SCLK I2C |
| 21 | PF0 | bi-directional | DATA I2C |
| 23 | --- | GND | Ground |