STMicroelectronics X-NUCLEO-IKS01A3

Overview

X-NUCLEO-IKS01A3 from STMicroelectronics is a motion and environmental sensor expansion board for STM32 Nucleo development platforms, featuring LSM6DSO (3-axis accelerometer + gyroscope), LIS2MDL (3-axis magnetometer), LIS2DW12 (ultra-low-power 3-axis accelerometer), LPS22HH (260–1260 hPa barometric pressure sensor), HTS221 (capacitive humidity/temperature), and STTS751 (–40 °C to +125 °C temperature sensor), all interfaced via I²C with Arduino UNO R3 and Morpho connector compatibility.

For engineers reviewing the X-NUCLEO-IKS01A3 datasheet, X-NUCLEO-IKS01A3 pinout, X-NUCLEO-IKS01A3 application, or X-NUCLEO-IKS01A3 equivalent, key selection considerations include multi-sensor integration capability, I²C hub functionality on LSM6DSO, configurable interrupt routing across six sensors, and support for STM32Cube firmware libraries with ready-to-run examples.

Technical Context

The board implements a distributed I²C sensor architecture where LSM6DSO acts as an optional sensor hub master, enabling data fusion and interrupt aggregation. All six sensors share two configurable I²C buses (I²C1 and I²C2), with JP7/JP8 shunt positioning determining bus routing and slave addressing.

Hardware-level sensor coordination is enabled through dedicated interrupt lines (M_INT1/M_INT2, USER_INT, DRDY signals) routed to STM32 Nucleo headers, supporting real-time wake-up, tap detection (LIS2DW12), orientation sensing (6D/4D), and pressure/humidity-triggered events (LPS22HH, HTS221).

Key Specifications

Availability

X-NUCLEO-IKS01A3 is available at Aetrix Electronics and suitable for industrial condition monitoring, wearable health devices, and smart home environmental analytics requiring stable component supply and rapid prototyping validation.

Supply support for X-NUCLEO-IKS01A3 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 analog components for industrial, automotive, and consumer applications.

X-NUCLEO-IKS01A3 belongs to ST's Nucleo expansion board product line, engineered to accelerate sensor-based firmware development and hardware validation for STM32-based IoT edge nodes and portable measurement systems.

FAQ

Does X-NUCLEO-IKS01A3 support SPI communication with any onboard sensor?

No - while LIS2DW12 and LIS2MDL have SPI capability per their individual datasheets, the X-NUCLEO-IKS01A3 board routes only I²C signals to those sensors. All SPI pins (MOSI/MISO/SCK/CS) are unconnected and marked DNM (Do Not Mount) on the schematic; no SPI traces or pull-ups are implemented.

Can LSM6DSO operate as an I²C master to offload sensor data acquisition from the STM32 host?

Yes - when configured via JP10 (shunt position 1–2), LSM6DSO operates in Sensor Hub mode, acting as I²C master on I²C1 to read data from LPS22HH, HTS221, and STTS751, then forwarding fused results via its internal FIFO to the STM32 over I²C2, reducing host CPU load and interrupt frequency.

What is the purpose of the DIL-24 socket (J1) on the board?

The DIL-24 socket provides mechanical and electrical interface for third-party MEMS adapter boards (e.g., ST's X-NUCLEO-IKA01A1 for acoustic sensing), allowing users to extend sensing capabilities beyond the six onboard sensors while maintaining consistent power, I/O voltage, and interrupt routing conventions.

Are all six sensors powered simultaneously during operation?

Yes - all sensors receive regulated 1.8 V or 3.3 V power continuously when the board is powered, but individual sensors can be placed into low-power or shutdown modes via I²C register writes (e.g., LIS2DW12's power-down mode draws 100 nA; LSM6DSO's "always-on" eco mode consumes 0.65 mA at ODR=104 Hz).