Seeed Studio XIAO STM32C5 board pairs dual CAN FD with heated 6-axis IMU

Seeed Studio has released the XIAO STM32C5, its first XIAO development board built around an STMicroelectronics MCU rather than the usual Espressif, Raspberry Pi, or Nordic silicon. The board centers on a 144 MHz STM32C5A3CG Arm Cortex-M33 with FPU and DSP extensions, targeting robotics, industrial control, and motion-sensing applications where precise sensor data under varying thermal conditions matters.

The standout hardware feature is a programmable heating circuit surrounding the LSM6DS3TR-C 6-axis IMU, using a ten-resistor array capable of generating up to 0.58W to stabilize sensor temperature and reduce measurement drift. For connectivity, the board provides two CAN FD controllers with one onboard TI TCAN3403-Q1 transceiver and pads for an external second transceiver. Seeed Studio provides open hardware files including KiCad and Eagle designs, schematics, and pin mappings, plus software support for STM32CubeIDE, PlatformIO with Zephyr RTOS, and MicroPython.

Hardware architecture and open-source support

• MCU core: STM32C5A3CG at 144 MHz with Arm Cortex-M33, FPU, and DSP instructions, 256KB SRAM, and 1MB internal flash.
• Dual CAN FD: Two FDCAN controllers with FDCAN2 wired to an onboard TI TCAN3403-Q1 transceiver and CANH/CANL pads; FDCAN1 exposes TX/RX for external transceiver use, with a disconnectable 120Ω termination resistor.
• Heated IMU: STMicroelectronics LSM6DS3TR-C 6-axis IMU surrounded by PWM-controlled heating resistors (ten-resistor array, 0.58W max) to enable firmware-driven temperature regulation and drift reduction.
• Storage and power: 16MB external flash, USB-C with 12 Mbps USB 2.0 Full-Speed, 3.7V Li-ion/LiPo battery support with onboard charging circuit, and battery voltage monitoring.
• Open hardware and software: KiCad and Eagle design files, schematics, pin mapping, plus software examples for STM32CubeIDE, PlatformIO/Zephyr RTOS, and MicroPython available via the project wiki.

Why it matters

The XIAO STM32C5 fills a gap in Seeed's lineup by combining industrial bus connectivity with precision motion sensing in a compact, open-hardware format, making it viable for closed-loop robotics and automotive prototyping where CAN FD and thermal-compensated IMU data are both essential. Its published schematics and multi-toolchain software support lower barriers for developers integrating STM32C5-class microcontrollers into Zephyr RTOS or MicroPython workflows, while the heated IMU design offers a reference implementation for temperature-sensitive sensor applications that other open-hardware projects may adapt.