STMicroelectronics STEVAL-MKI243A

Overview

STEVAL-MKI243A from STMicroelectronics is an adapter evaluation board for the ASM330LHHXG1 6-axis automotive IMU, providing full DIL24 socket compatibility, complete pinout access (including INT1/INT2, CS, SCL/SDA, SDO, VDD/VDDIO, GND), and pre-mounted decoupling capacitors (10 µF + 100 nF) on VDD. It enables rapid prototyping of vehicle-to-everything (V2X) inertial sensing systems.

For engineers reviewing the STEVAL-MKI243A datasheet, STEVAL-MKI243A pinout, STEVAL-MKI243A application, or STEVAL-MKI243A equivalent, this board delivers verified mechanical and electrical interface alignment with the ASM330LHHXG1, direct plug-in capability into standard DIL24 sockets, and seamless integration with the STEVAL-MKI109D host platform for MEMS Studio GUI-based sensor configuration and data streaming.

Technical Context

The STEVAL-MKI243A implements a passive, zero-logic adapter function: it maps all 24 pins of the ASM330LHHXG1 QFN24 package to a dual-row 12×2 DIL24 footprint without signal conditioning, level shifting, or power regulation. Power delivery is direct-VDD (2.18–3.6 V) and VDDIO (1.71–3.6 V) are brought out unmodified with dedicated bulk (10 µF) and high-frequency (100 nF) decoupling.

Signal routing preserves native I²C (SCL/SDA), SPI (CS/SCL/SDA/SDO), and interrupt (INT1/INT2) functionality. No pull-ups, buffers, or ESD protection components are integrated-the board relies entirely on the host platform (e.g., STEVAL-MKI109D) for bus termination and signal integrity management.

Key Specifications

Availability

STEVAL-MKI243A is available at Aetrix Electronics and suitable for automotive ADAS sensor validation, V2X inertial fusion prototyping, and embedded MEMS algorithm development requiring stable component supply and traceable ST evaluation hardware.

Supply support for STEVAL-MKI243A 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 automotive, industrial, and consumer markets.

This board belongs to ST's STEVAL MEMS evaluation platform family, engineered specifically to accelerate sensor integration by providing standardized mechanical interfaces, validated signal routing, and direct compatibility with the STEVAL-MKI109D host controller and MEMS Studio software stack.

FAQ

Does the STEVAL-MKI243A include voltage regulation or level-shifting circuitry?

No. The board provides direct pass-through routing only: VDD (2.18–3.6 V) and VDDIO (1.71–3.6 V) must be supplied externally at correct levels. No LDOs, regulators, or logic-level translators are present-compliance with ASM330LHHXG1 absolute maximum ratings is the user's responsibility.

Can the STEVAL-MKI243A operate independently without the STEVAL-MKI109D?

No. It is a passive adapter board with no onboard MCU, firmware, or USB interface. Power, communication, and data acquisition require connection to a host platform such as the STEVAL-MKI109D, which provides the bridge microcontroller, MEMS Studio connectivity, and sensor initialization routines.

What is the purpose of the two 12-pin headers (JP1 and JP2)?

JP1 and JP2 provide mirrored 12-pin male headers that mate directly with the STEVAL-MKI109D's sensor interface connectors. They deliver identical pin mapping for both I²C and SPI modes-allowing flexible bus selection without hardware modification-and maintain strict 1:1 signal continuity from ASM330LHHXG1 pins to host platform GPIOs.

Is the ASM330LHHXG1 soldered to the STEVAL-MKI243A board?

Yes. The ASM330LHHXG1TR is surface-mounted in its native QFN24 package with exposed thermal pad, fully assembled and tested per DB5120 Rev 2. No socket or replacement provision is provided-the board ships with the IMU permanently installed and electrically validated.