STM32F405ZGT6

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FAQ

Q: What Pixhawk hardware uses this chip?
A: The STM32F405ZGT6 in a LQFP-144 package is used in Pixhawk-class autopilots. F405 silicon powers the Pixhawk 1, Pixhawk 2.4.x, and numerous third-party designs. The R-package (64-pin) is the original Pixhawk 1 MCU; V-package (100-pin) is used on full-featured 2.4.x boards; Z-package (144-pin) provid

Q: Can the STM32F405 run ArduPilot 4.5+ with EKF3?
A: Yes. The F405 with 1 MB Flash and 192 KB SRAM fully supports ArduPilot 4.5+ running EKF3. The hardware FPU handles 24-state EKF covariance propagation in single-precision float at full sensor rate. A typical Copter build uses 700–850 KB Flash and 110–140 KB SRAM.

Q: What is CCM RAM and why does it matter for drone autopilots?
A: The 64 KB Core-Coupled Memory (CCM) is zero-wait-state SRAM tightly coupled to the Cortex-M4F core. In PX4/ArduPilot, the real-time flight control loop (sensor read → EKF → PID → mixer → PWM) is placed in CCM to guarantee deterministic timing regardless of DMA/telemetry/SDIO activity. This is critic

1. Product Overview

The STM32F405ZGT6 belongs to ST's STM32F405 series — the silicon foundation of Pixhawk 1 (PX4FMUv2) and Pixhawk 2.4.x , the reference open-source drone autopilot platforms. Its Cortex-M4F core with hardware FPU enables fast single-precision math for ArduPilot's EKF2/EKF3 state estimators, PID control loops, and attitude quaternion computation. The 144-pin LQFP-144 package delivers 114 GPIO for complete autopilot I/O including multiple UARTs, SPI buses for IMUs, I²C for external sensors, CAN for UAVCAN/DroneCAN peripherals, and SDIO for high-speed 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 — ArduPilot EKF & PX4 Native
• 1 MB Flash + 192 KB (128 KB + 64 KB CCM) SRAM — Full ArduPilot/PX4 Stack
• Dual CAN 2.0B — UAVCAN/DroneCAN Peripheral Ecosystem
• SDIO Interface — High-Speed Blackbox Logging
• 3× 12-bit ADC + 2× DAC — Analog Sensor & Actuator Pipeline
• Advanced Timers — Multi-Rotor to Fixed-Wing PWM

3. Technical Specifications

4. Applications

• Pixhawk 1 & 2.4.x Drone Autopilots
• PX4 FMUv2/FMUv3 Hardware Designs
• Matek / Omnibus / Kakute Flight Controllers
• Professional Aerial Surveying & Inspection UAVs
• Robotics & AGV Autopilots

5. Supply Solutions

Aurora supports customers with STM32F405ZGT6 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 STM32F405ZGT6 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.

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