STM32F405RGT6

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FAQ

Q: What Pixhawk hardware versions use the STM32F405RGT6?
A: The STM32F405RGT6 is the MCU on Pixhawk 1 (PX4FMUv2, LQFP-64), Pixhawk 2.4.5 through 2.4.8, and the original 3DR Pixhawk. The 2.4.x series uses the LQFP-100 or LQFP-144 package variants (VGT6/ZGT6) for additional GPIO. All of these are F405 silicon. The move to F427/H743 on Pixhawk 2.1 (Cube) and Pi

Q: Can the STM32F405 run ArduPilot 4.5+ with EKF3?
A: Yes. The STM32F405 with 1 MB Flash and 192 KB SRAM fully supports ArduPilot 4.5+ running EKF3 (the default state estimator since Copter 4.1). The hardware FPU handles the 24-state EKF covariance propagation in single-precision float at full sensor rate. Memory usage for a typical Copter build with E

Q: What is the CCM RAM and why does it matter for drones?
A: The 64 KB Core-Coupled Memory (CCM) is a block of zero-wait-state SRAM tightly coupled to the Cortex-M4F core, separate from the main 128 KB system SRAM. In PX4 and ArduPilot, the real-time flight control loop (sensor read → EKF update → PID compute → mixer → PWM output) is placed in CCM to guarante

1. Product Overview

The STM32F405RGT6 is the original MCU at the heart of Pixhawk 1 (PX4FMUv2) and Pixhawk 2.4.x (PX4FMUv2) — the reference hardware platforms that defined the PX4 and ArduPilot open-source drone autopilot ecosystems. Its Cortex-M4F core with hardware floating-point unit enables fast single-precision math for PID control loops, Extended Kalman Filters (EKF2/EKF3 in ArduPilot), and attitude estimation at update rates exceeding 8 kHz. The 168 MHz clock, ART Accelerator (zero-wait-state Flash execution), and 192 KB SRAM provide ample headroom for full-stack autopilot firmware with GPS waypoint navigation, telemetry streaming, and onboard logging. STM32F405 — the chip powering Pixhawk 1 and Pixhawk 2.4.x , the most widely deployed open-source drone autopilot hardware in the world.

2. Key Features

• 168 MHz Cortex-M4F + Hardware FPU — PX4 & ArduPilot Native
• 1 MB Flash + 192 KB SRAM — Full ArduPilot / PX4 Stack
• Dual CAN 2.0B — UAVCAN / DroneCAN Ecosystem
• SDIO Interface — High-Speed Onboard Blackbox Logging
• 3× 12-bit ADC + 2× DAC — Advanced Sensor & Actuator Pipeline
• Advanced Timers with 6+ PWM Channels — Quad to Octocopter

3. Technical Specifications

4. Applications

• Pixhawk 1 / Pixhawk 2.4.x Flight Controller
• PX4 / ArduPilot Reference Hardware
• Matek H743 / Omnibus F4 Pro / Kakute F4
• Professional Surveying & Inspection UAVs
• Robotics & Ground Vehicle Autopilots

5. Supply Solutions

Aurora supports customers with STM32F405RGT6 sourcing through verified global supply channels. We help OEMs and manufacturers manage availability challenges, production requirements, and lifecycle risks with flexible procurement solutions.

6. Quality Assurance

All components supplied by Aurora follow strict quality control procedures, including supplier verification, documentation review, inspection, and traceability management to ensure product authenticity and reliability.

7. Alternative & Replacement Solutions

When original STM32F405RGT6 components face shortages, lifecycle changes, or long lead times, Aurora helps customers identify suitable alternative components based on technical requirements, application needs, and supply conditions.

8. Request Quote / Contact

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