FMUv4-PRO takes input from all of the Pixhawk stakeholders; end users, developers, researchers and manufacturing partners. Goals for this iteration of the platform are:

  • An integrated, single-board flight controller for space constrained applications

  • A modular multi-board flight controller for professional applications

  • Sufficient I/O for most applications without expansion.

  • Improved ease-of-use.

  • Improved sensor performance

  • Improved microcontroller resources (384 KB RAM, 2 MB flash).

  • Increased reliability and reduced integration complexity.

  • Reduced BoM and manufacturing costs.

Key design points:

  • All-in-one design with integrated FMU and optional IO and lots of I/O ports.

  • Improved manufacturability, designed for simpler mounting and case design.

  • Separate power supplies for FMU and IO (see power architecture section).

  • Onboard battery backup for FMU and IO SRAM / RTC.

  • Integration with two standard power bricks.

Technology upgrades:

  • Microcontroller upgrade to STM32F469; flash increases from 1MiB to 2MiB, RAM increases from 256KiB to 384KiB, more peripheral ports.

  • ICM-20602, MPU9K integrated gyro / accelerometer / magnetometers.

  • LIS3MDL compass (HMC5983 is now obsolete).

  • Sensors connected via two SPI buses (one high rate and one low-noise bus)

  • Two I2C buses

  • Two CAN buses

  • Voltage / battery readings from two power modules

  • FrSky Inverter

  • JST GH user-friendly connectors

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