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RadiolinkPIX6 Flight Controller

RadiolinkPIX6

Featuring STM32F7 cpu, vibration isolation of IMUs, redundant IMUs, integrated OSD chip, IMU heating, and DShot.

Specifications

  • Processor
    • 32-bit ARM Cortex M7 core with DPFPU - STM32F765VIT6
    • 216 MHz/512 KB RAM/2 MB Flash
    • 32-bit IOMCU co-processor - STM32F100
    • 32KB FRAM - FM25V02A
    • AT7456E OSD
  • Sensors
    • Bosh BMI088 IMU (accel, gyro)
    • InvenSense ICM-42688 IMU (accel, gyro)
    • SPL06 barometer
    • IST8310 magnetometer
  • Power
    • SMBUS/I2C Power Module Inputs(I2C)
    • voltage and current monitor inputs(Analog)
  • Interfaces
    • 16 PWM Outputs with independent power rail for external power source
    • 5x UART serial ports, 2 with HW flow control
    • Camera Input and Video Output
    • PPM/SBUS input, DSM/SBUS input
    • RSSI (PWM or voltage) input
    • I2C, SPI, 2x CAN, USB
    • 3.3V and 6.6V ADC inputs
    • Buzzer and Safety Switch
    • microSD card
  • Dimensions
    • Weight 80g
    • Size 94mm x 51.5mm x 14.5mm

Connector assignments

Top View

Top_View

Left View

Right_View

Right View

Left_View

Rear View

Rear

Pinouts

TELEM1, TELEM2 ports

Pin Signal Volt
1 VCC +5V
2 TX(OUT) +3.3V
3 RX(IN) +3.3V
4 CTS +3.3V
5 RTS +3.3V
6 GND GND

OSD

Pin Signal Volt
1 GND GND
2 VOUT +3.3V
3 VCC +5V
4 GND GND
5 VCC +5V
6 VIN +3.3V

I2C port

Pin Signal Volt
1 VCC +5V
2 SCL +3.3V (pullups)
3 SDA +3.3V (pullups)
4 GND GND

CAN1, CAN2 ports

Pin Signal Volt
1 VCC +5V
2 CAN_H +12V
3 CAN_L +12V
4 GND GND

GPS1 port

Pin Signal Volt
1 VCC +5V
2 TX(OUT) +3.3V
3 RX(IN) +3.3V
4 SCL +3.3V
5 SDA +3.3V
6 GND GND

GPS2 Port

Pin Signal Volt
1 VCC +5V
2 TX(OUT) +3.3V
3 RX(IN) +3.3V
4 SCL +3.3V
5 SDA +3.3V
6 GND GND

SPI

Pin Signal Volt
1 VCC +5V
2 SPI_SCK +3.3V
3 SPI_MISO +3.3V
4 SPI_MOSI +3.3V
5 !SPI_NSS1 +3.3V
6 !SPI_NSS2 +3.3V
7 DRDY +3.3V
8 GND GND

POWER1

Pin Signal Volt
1 VCC +5V
2 VCC +5V
3 CURRENT up to +3.3V
4 VOLTAGE up to +3.3V
5 GND GND
6 GND GND

POWER2

Pin Signal Volt
1 VCC +5V
2 VCC +5V
3 SCL +3.3V
4 SDA +3.3V
5 GND GND
6 GND GND

ADC 3.3V

Pin Signal Volt
1 VCC +5V
2 ADC IN1 up to +3.3V
3 GND GND
4 ADC IN2 up to +3.3v
5 GND GND

ADC 6.6V

Pin Signal Volt
1 VCC +5V
2 ADC IN up to 6.6V
3 GND GND

USB remote port

Pin Signal Volt
1 USB VDD +5V
2 DM +3.3V
3 DP +3.3V
4 GND GND

SWITCH

Pin Signal Volt
1 VCC +3.3V
2 !IO_LED_SAFETY GND
3 SAFETY GND

Buzzer port

Pin Signal Volt
1 VCC +5V
2 BUZZER- +5V

Spektrum/DSM Port

Pin Signal Volt
1 VCC +3.3V
2 GND GND
3 Signal +3.3V

Debug port

Pin Signal Volt
1 VCC +5V
2 FMU_SWCLK +3.3V
3 FMU_SWDIO +3.3V
4 TX(UART7) +3.3V
5 RX(UART7) +3.3V
6 IO_SWCLK +3.3V
7 IO_SWDIO +3.3V
8 GND GND

UART Mapping

  • SERIAL0 -> USB
  • SERIAL1 -> USART2 (Telem1) RTS/CTS pins, RX DMA capable
  • SERIAL2 -> USART3 (Telem2) RTS/CTS pins, TX/RX DMA capable
  • SERIAL3 -> USART1 (GPS1), TX/RX DMA capable
  • SERIAL4 -> UART4 (GPS2), No DMA
  • SERIAL5 -> UART7 (User), No DMA

RC Input

The RCIN pin, which by default is mapped to a timer input, can be used for all ArduPilot supported receiver protocols, except CRSF/ELRS and SRXL2 which require a true UART connection. However, FPort, when connected in this manner, will only provide RC without telemetry.

To allow CRSF and embedded telemetry available in Fport, CRSF, and SRXL2 receivers, a full UART, such as SERIAL1 (USART2) would need to be used for receiver connections. Below are setups using Serial6.

Any UART can be used for RC system connections in ArduPilot also, and is compatible with all protocols except PPM. See Radio Control Systems for details.

OSD Support

The RadiolinkPIX6 support using its internal OSD using OSD_TYPE 1 (MAX7456 driver). External OSD support such as DJI or DisplayPort is supported using UART3 or any other free UART. See MSP OSD for more info.

PWM Output

The RadiolinkPIX6 supports up to 16 PWM outputs. All 16 outputs support all normal PWM output formats. All FMU outputs also support DShot.

The 8 FMU PWM outputs are in 4 groups:

  • Outputs 1, 2, 3 and 4 in group1
  • Outputs 5 and 8 in group2
  • Outputs 6 and 7 in group3

FMU outputs within the same group need to use the same output rate and protocol. If any output in a group uses DShot then all channels in that group need to use DShot.

Battery Monitoring

The board has 2 dedicated power monitor ports with a 6 pin connector. One is the Analog power monitor(Power1), and the others is the I2C power monitor(Power2).

Power1 port(Analog)

The parameters should be set:

BATT_MONITOR =4

BATT_VOLT_PIN 2

BATT_CURR_PIN 5

BATT_VOLT_MULT 18

BATT_AMP_PERVLT 24

Power2 port(I2C)

The parameters should be set.:

Compass

The RadiolinkPIX6 has a built-in compass. Due to potential interference, the autopilot is usually used with an external I2C compass as part of a GPS/Compass combination.

Analog inputs

The RadiolinkPIX6 has 3 analog inputs, one 6V tolerant and two 3.3V tolerant

  • ADC Pin12 -> ADC 6.6V Sense
  • ADC Pin4 -> ADC IN1 3.3V Sense
  • ADC Pin13 -> ADC IN2 3.3V Sense
  • Analog 3.3V RSSI input pin = 103

Connectors

Unless noted otherwise all connectors are JST GH