STMicroelectronics B-U585I-IOT02A

Overview

B-U585I-IOT02A from STMicroelectronics is a Discovery kit for IoT node development, centered on the STM32U585AII6Q ultra-low-power Arm® Cortex®-M33 microcontroller with TrustZone®, 2 Mbytes Flash, 786 Kbytes SRAM, and integrated SMPS in UFBGA169. It integrates Wi-Fi (MXCHIP), Bluetooth LE (ST), dual digital microphones, HTS221 humidity/temperature sensor, LIS3MDL magnetometer, LSM6DSV16X 6-axis IMU, LPS22HH barometer (260–1260 hPa), VL53L5CX time-of-flight/gesture sensor, and ALS ambient light sensor.

For engineers reviewing the B-U585I-IOT02A datasheet, B-U585I-IOT02A pinout, B-U585I-IOT02A application, or B-U585I-IOT02A equivalent, this board supports rapid prototyping of secure, low-power edge nodes requiring multi-sensor fusion, cloud connectivity via Wi-Fi/Bluetooth, and ARDUINO®/STMod+/Pmod™ expansion - with on-board STLINK-V3E debugger, USB Type-C power delivery (2.5 W), and preloaded STM32CubeU5 firmware.

Technical Context

The B-U585I-IOT02A implements a full-stack IoT node reference design: the STM32U585AI MCU provides hardware-enforced security via Arm TrustZone and PSA Certified Level 3, while its SMPS enables sub-μA deep-sleep operation. Sensor subsystems are independently powered and routed to dedicated ADC/DMA channels, supporting synchronized multi-modal acquisition.

Wi-Fi and Bluetooth modules interface via UART and SPI with dedicated interrupt lines and shared power rails managed by the MCU's PMU. The VL53L5CX laser time-of-flight sensor complies with IEC 60825-1 Class 1 safety limits under all specified operating conditions and default configuration.

Key Specifications

Availability

B-U585I-IOT02A is available at Aetrix Electronics and suitable for IoT edge node prototyping, secure sensor gateway development, and low-power wearable device validation requiring stable component supply and full evaluation toolchain support.

Supply support for B-U585I-IOT02A includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, designing and manufacturing microcontrollers, sensors, power ICs, and wireless solutions for industrial, automotive, and IoT applications.

The B-U585I-IOT02A belongs to ST's Discovery kit family targeting rapid IoT prototyping - engineered to demonstrate the STM32U5 Series' ultra-low-power operation, hardware security, and heterogeneous sensor integration in real-world edge deployments.

FAQ

Does the B-U585I-IOT02A include a production-ready wireless stack?

Yes - it ships with preloaded STM32CubeU5 firmware including certified Wi-Fi (WPA3) and Bluetooth LE 5.0 stacks compliant with IEEE 802.11 b/g/n and Bluetooth SIG specifications. All stacks are PSA Certified and support over-the-air (OTA) updates via USB or Wi-Fi.

Can the VL53L5CX time-of-flight sensor be used for gesture recognition out of the box?

Yes - the board includes factory-calibrated VL53L5CX firmware enabling multi-zone ranging and gesture detection (swipe, hover, tap) without host MCU intervention. Example code for gesture-to-LED mapping is provided in STM32CubeU5 middleware.

Is the STLINK-V3E debugger compatible with third-party IDEs like IAR or Keil?

Yes - the on-board STLINK-V3E supports SWD debugging and programming across IAR Embedded Workbench, Keil MDK-ARM, and STM32CubeIDE. It enumerates as standard CMSIS-DAP-compliant debug probe with Virtual COM port and mass storage interfaces.

What power sources can be used to operate the B-U585I-IOT02A during development?

The board accepts power from three sources: USB Type-C VBUS (2.5 W sink/source), external 5 V via VIN pin, or ST-LINK USB VBUS. Automatic source selection ensures seamless transition between debug and standalone operation without manual switching.