STMicroelectronics STEVAL-MKI222V1

Overview

STEVAL-MKI222V1 from STMicroelectronics is an adapter evaluation board for the LIS2DU12 ultralow-power 3-axis digital accelerometer, designed to plug directly into a standard DIL24 socket and provide full pin access, on-board decoupling (10 µF + dual 100 nF), and compatibility with STEVAL-MKI109D and X-NUCLEO-IKS4A1 platforms for rapid sensor prototyping in motion-aware edge devices.

For engineers reviewing the STEVAL-MKI222V1 datasheet, STEVAL-MKI222V1 pinout, STEVAL-MKI222V1 application, or STEVAL-MKI222V1 equivalent, this board enables direct integration of the LIS2DU12 into custom PCBs or evaluation ecosystems via standardized DIL24 footprint, I²C/SPI interface routing, interrupt signal breakout, and VDD/VDDIO power separation-critical for low-noise ultralow-power sensor validation.

Technical Context

The STEVAL-MKI222V1 implements a passive, unpopulated carrier board architecture with no active logic or firmware: it routes all 24 pins of the LIS2DU12TR in a 0.6-inch DIL24 layout, including dedicated VDD (3.3 V) and VDDIO (1.8–3.3 V) supply lines, dual decoupling capacitors per rail, and exposed interrupt outputs (INT1/INT2) for event-driven wake-up signaling.

It provides mechanical and electrical interoperability with ST's MEMS evaluation ecosystem-specifically bridging the LIS2DU12 to the STEVAL-MKI109D's STM32-based USB-to-sensor interface and the X-NUCLEO-IKS4A1's Nucleo-compatible expansion header-enabling real-time data streaming, register configuration, and algorithm development using MEMS Studio GUI or custom HAL drivers.

Key Specifications

Availability

STEVAL-MKI222V1 is available at Aetrix Electronics and suitable for motion sensor evaluation, industrial condition monitoring, wearable device prototyping, and IoT edge node development requiring stable component supply and rapid hardware iteration.

Supply support for STEVAL-MKI222V1 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, Switzerland, designing and manufacturing microcontrollers, sensors, power ICs, and analog components for industrial, automotive, and consumer applications.

This board belongs to ST's Professional MEMS Tools product line, engineered specifically to accelerate evaluation and integration of ST's digital motion and environmental sensors-emphasizing mechanical compatibility, signal integrity preservation, and seamless software toolchain alignment.

FAQ

Does STEVAL-MKI222V1 include the LIS2DU12 sensor IC?

No. The STEVAL-MKI222V1 is a bare adapter board only-it provides the physical footprint, pin breakout, and decoupling for the LIS2DU12TR but does not include the sensor IC itself. Users must solder or socket the LIS2DU12TR separately to use the board.

Can STEVAL-MKI222V1 operate standalone without STEVAL-MKI109D?

No. This board has no onboard microcontroller, USB interface, or firmware. It requires connection to an external host platform-such as STEVAL-MKI109D, X-NUCLEO-IKS4A1, or a custom MCU system-with appropriate I²C/SPI drivers and power supplies to configure and read the LIS2DU12.

What voltage levels are supported on VDD and VDDIO?

VDD accepts 3.3 V ±5% for core sensor operation; VDDIO supports 1.8 V to 3.3 V for I/O logic level adaptation. Both rails are independently decoupled, enabling interfacing with mixed-voltage host systems while maintaining LIS2DU12's ultralow-power performance.

Is MEMS Studio software required to use this board?

No. MEMS Studio is optional GUI software provided by ST for quick evaluation. Engineers may instead use custom firmware (e.g., STM32 HAL, Arduino, or Zephyr drivers) to communicate with the LIS2DU12 via I²C or SPI-STEVAL-MKI222V1 imposes no software dependencies.