STMicroelectronics STEVAL-MKI233KA

Overview

STEVAL-MKI233KA from STMicroelectronics is an evaluation kit for the ISM330ISN 6-axis inertial measurement unit (IMU), integrating a 3-axis accelerometer, 3-axis gyroscope, and embedded Intelligent Sensor Processing Unit (ISPU). It includes the STEVAL-MKI233A sensing board, STEVAL-MKIGIBV5 adapter board, and flat cable - enabling direct sensor placement in target systems and full DIL24 socket compatibility.

For engineers reviewing the STEVAL-MKI233KA datasheet, STEVAL-MKI233KA pinout, STEVAL-MKI233KA application, or STEVAL-MKI233KA equivalent, this kit supports rapid development of embedded AI-based anomaly detection using NanoEdge AI Studio, integration with MEMS Studio GUI, and interoperability with the STEVAL-MKI109D platform for real-time sensor data acquisition and firmware prototyping.

Technical Context

The kit implements a hardware abstraction layer between the ISM330ISN and host microcontrollers via I²C/SPI interfaces, with dedicated interrupt lines (INT1/INT2) and configurable voltage domains (VDD = 1.71–3.6 V, VDDIO = 1.71–3.6 V). All critical decoupling capacitors (1 µF + 100 nF per supply rail) are pre-mounted on the STEVAL-MKI233A board.

It enables zero-code ML model deployment to the ISPU through NanoEdge AI Studio, supporting always-on, ultra-low-power edge inference without external CPU intervention. The adapter board provides standard 2×12 header pinout matching the ISM330ISN's native DIL24 footprint and signal mapping.

Key Specifications

Availability

STEVAL-MKI233KA is available at Aetrix Electronics and suitable for industrial robot condition monitoring, predictive maintenance prototyping, and embedded AI sensor node development requiring stable component supply and validated toolchain integration.

Supply support for STEVAL-MKI233KA 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/mixed-signal devices for industrial, automotive, and consumer applications.

This kit belongs to ST's MEMS evaluation platform family, engineered to accelerate sensor algorithm development, ISPU-based edge AI deployment, and seamless integration with STM32-based host systems and ST's ecosystem tools.

FAQ

Does STEVAL-MKI233KA require external programming hardware?

No. The kit is plug-and-play with the STEVAL-MKI109D platform, which provides USB-to-SPI/I²C bridging and firmware upload capability. No separate debugger or programmer is needed - MEMS Studio and NanoEdge AI Studio communicate directly via the host PC's USB connection to the STEVAL-MKI109D.

Can the ISPU on the ISM330ISN be reprogrammed multiple times?

Yes. The embedded ISPU supports over-the-air (OTA) firmware updates via I²C or SPI. NanoEdge AI Studio generates compact, optimized inference libraries that are loaded into the ISPU's 128 KB SRAM and executed independently - with no limit on reprogramming cycles during development.

What is the role of the STEVAL-MKIGIBV5 adapter board?

The STEVAL-MKIGIBV5 provides mechanical and electrical adaptation from the ISM330ISN's DIL24 footprint to standard 2×12 headers, preserving all signal integrity (including SCL/SDA/CS/INTx/SDO/SCX/SDX). It enables direct insertion into breadboards or custom carrier boards while maintaining correct voltage domain routing and decoupling.

Is MEMS Studio required to use this evaluation kit?

No. While MEMS Studio provides graphical configuration and real-time data streaming, the kit supports raw register-level access via standard I²C/SPI commands. Developers may use custom firmware on any compatible MCU (e.g., STM32, ESP32, or Raspberry Pi Pico) to read sensor data and interface with the ISPU directly.