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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

ValueIdentifierRXTXNotes
1VCPPA11PA12Mini USB connector
2USART1PB7PB6Marked as R1 and T1 on the board
3USART2PA3PA2Marked as R2 and T2 on the board
4USART3PB11PB10Marked as R3 and T3 on the board

Pinouts

Full pinout details are available in the manual, here:

http://rcexplorer.se/product/f3fc-racing/

IOs

PadSignalNotes
IsensePB2Analog sensor
VbatPA5Voltage supplied to the built in BEC
LEDPB8RGB LED control
FBPA6Servo position FeedBack / RSSI input
BZ-PA0Buzzer output
6PA1Used as PPM input when selected
SCLKPA9SCLK I2C
SDAPA10SDA 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