Legacy target SPRacingF3

Board - SPRacingF3

The Seriously Pro Racing MOF3 board (SPRacingF3) is the first board designed specifically for INAV.

Full details available on the website, here:

http://seriouslypro.com/spracingf3

Hardware Features

• No compromise I/O. Use all the features all the time; e.g. Connect your OSD + SmartPort + SBus + GPS + LED Strip + Battery Monitoring + HC-SR04 + 8 motors - all at the same time!
• On-board high-capacity black box flight log recorder - optimize your tuning and see the results of your setup without guesswork. (Acro and Deluxe)
• Next-generation STM32 F3 processor with hardware floating point unit for efficient flight calculations and faster ARM-Cortex M4 core.
• Stackable design - perfect for integrating with OSDs and power distribution boards.
• 16 PWM I/O lines for ESCs, Servos and legacy receivers. 8 available on standard pin headers. 8 via side mounted connectors.
• Supports SBus, SumH, SumD, Spektrum1024/2048, XBus, PPM, PWM receivers. No external inverters required (built-in).
• Dedicated output for programmable LEDs - great for orientation, racing and night flying.
• Dedicated I2C port for connection of OLED display without needing flight battery.
• Battery monitoring ports for voltage and current.
• Buzzer port for audible warnings and notifications.
• Solder pads in addition to connectors for HC-SR04, PPM, RSSI, Current, GPIO, LED Strip, 3.3v,
• Developer friendly debugging port (SWD) and boot mode selection, unbrickable bootloader.
• Symmetrical design for a super tidy wiring.
• Wire up using using pin headers, JST-SH sockets or solder pads. Use either right-angled or straight pin-headers.
• Barometer mounted on the bottom of the board for easy wind isolation.

Serial Ports

Value	Identifier	RX	TX	5v Tolerant	Notes
1	USART1	PA10	PA9	YES	Internally connected to USB port via CP2102 IC. Also available on a USART1 JST connector and on through hole pins.
2	USART2	PA15	PA14	YES	Available on USART2 JST port only.
3	USART3	PB11 / IO2_3	PB10 / IO2_4	NO	Available on IO_2, USART3 JST port and through hole pins.

• You cannot use SWD and USART2 at the same time.
• You may encounter flashing problems if you have something connected to the USART1 RX/TX pins. Power other devices of and/or disconnect them.

Pinouts

Full pinout details are available in the manual, here:

http://seriouslypro.com/spracingf3#manual

IO_1

Pin	Function	Notes
1	Ground
2	VCC_IN	Voltage as-supplied by BEC.
3	RX_PPM	Enable feature RX_PPM
4	GPIO
5	SoftSerial1_RX
6	SoftSerial1_TX
7	LED_STRIP	Enable feature LED_STRIP
8	VCC	3.3v output for LOW CURRENT application only

IO_2

Pin	Function	Notes
1	Ground
2	VCC_IN	Voltage as-supplied by BEC.
3	RX_SERIAL	UART3 RX
4		UART3_TX
5	HC-SR04_TRIG/SoftSerial2_RX	Enable feature SOFTSERIAL or HC-SR04 rangefinder
6	HC-SR04_ECHO/SoftSerial2_TX	Enable feature SOFTSERIAL or HC-SR04 rangefinder
7	ADC_1	Current Sensor
8	ADC_2	RSSI

UART1/2/3

Pin	Function	Notes
1	Ground
2	VCC_IN	Voltage as-supplied by BEC.
3	TXD
4	RXD

I2C

Pin	Function	Notes
1	Ground
2	5.0v	Voltage as-supplied by BEC OR USB, always on
3	SCL
4	SDA

SWD

The port cannot be used at the same time as UART2.

Pin	Function	Notes
1	Ground
2	NRST	Voltage as-supplied by BEC OR USB, always on
3	SWDIO
4	SWDCLK