F3FC Racing
Designed by RCExplorer.se
Full details available on the website, here:
http://rcexplorer.se/product/f3fc-racing/
Hardware Features
- STM32F303CC Processor
- MPU6000 connected via SPI (With interrupt pin connected)
- 3 UARTs
- VCP USB
- 6 PWM channels (PWM 6 used as PPM input when selected)
- Supports SBus, SumH, SumD, Spektrum1024/2048, XBus and PPM receivers. No external inverters required.
- Dedicated RGB LED control pin.
- Dedicated I2C port
- Integrated battery monitoring
- Current sensor input pin
- Buzzer/Beeper port
- Built in 5V BEC (500mA)
- Push button for entering DFU mode
- 3.3V pad available for spectrum satellite receivers.
Serial Ports
| Value | Identifier | RX | TX | Notes |
|---|---|---|---|---|
| 1 | VCP | PA11 | PA12 | Mini USB connector |
| 2 | USART1 | PB7 | PB6 | Marked as R1 and T1 on the board |
| 3 | USART2 | PA3 | PA2 | Marked as R2 and T2 on the board |
| 4 | USART3 | PB11 | PB10 | Marked as R3 and T3 on the board |
Pinouts
Full pinout details are available in the manual, here:
http://rcexplorer.se/product/f3fc-racing/
IOs
| Pad | Signal | Notes |
|---|---|---|
| Isense | PB2 | Analog sensor |
| Vbat | PA5 | Voltage supplied to the built in BEC |
| LED | PB8 | RGB LED control |
| FB | PA6 | Servo position FeedBack / RSSI input |
| BZ- | PA0 | Buzzer output |
| 6 | PA1 | Used as PPM input when selected |
| SCLK | PA9 | SCLK I2C |
| SDA | PA10 | SDA I2C |
PWM’s are marked as 1-6
Voltage and current monitoring
Voltage is measured on the “Vbat” (which also powers the built in BEC) pads through a voltage divider of 10k/1k connected to PA5.
Isense pad is connected straight to PB2 and expects an analog voltage between 0-3.3V