Holybro Pixhawk 4

Pixhawk® 4 Flight Controller – Overview and Technical Details

The Pixhawk 4 combines cutting-edge processor technology from STMicroelectronics® with sensors from Bosch® and InvenSense® along with the NuttX real-time operating system. The result is a powerful, flexible, and reliable flight controller suitable for any type of autonomous vehicle.

The Pixhawk 4’s microcontroller features 2 MB of flash memory and 512 KB of RAM. With this increased power and memory, developers can implement more complex algorithms and models, making development work more efficient.

High-performance, low-noise IMUs onboard provide precise stabilization. All sensors offer “data-ready” signals routed to separate interrupt and timer pins, enabling exact time-stamping of sensor data. Newly designed vibration dampening allows even more accurate readings, improving overall flight performance.

Two external SPI buses with six chip-select lines allow the connection of additional sensors and SPI-compatible payloads. There are four I²C buses in total: two for external sensors and two combined with serial ports for GPS/compass modules.

Note:

• M10 GPS requires PX4 version 1.14 and ArduPilot version 4.3 or newer.

Technical Data

Main FMU Processor:

• STM32F765 – 32 Bit Arm® Cortex®-M7, 216 MHz, 2 MB Flash, 512 KB RAM

IO Processor:

• STM32F103 – 32 Bit Arm® Cortex®-M3, 72 MHz, 64 KB SRAM (current)
• STM32F100 – 32 Bit Arm® Cortex®-M3, 24 MHz, 8 KB SRAM (discontinued)

Onboard Sensors:

• Accel/Gyro: ICM-20689
• Accel/Gyro: BMI055 / ICM-20602
• Magnetometer: IST8310
• Barometer: MS5611

Electrical Data:

• Power Module Output: 4.9–5.5 V
• Maximum Input Voltage: 6 V
• Maximum Current Sensing: 120 A
• USB Power Input: 4.75–5.25 V
• Servo Rail Input: 0–36 V
• Operating Temperature: -25 °C to 85 °C

Mechanical Data:

• Dimensions: 44 × 84 × 12 mm
• Weight (Plastic Case): 33.3 g
• Weight (Aluminum Case): 49 g

Scope of delivery

• Pixhawk 4 Flight Controller (Plastic or Aluminum Case)
• Cable Set