STMicroelectronics STEVAL-MKI123V1

Overview

STEVAL-MKI123V1 from STMicroelectronics is an adapter board for the LSM330D 3-axis accelerometer and 3-axis gyroscope MEMS sensor, enabling plug-in evaluation via standard DIL-24 socket. It provides full pinout access, on-board decoupling (100 nF ×2, 10 µF), VDD_IO support, and direct compatibility with the STEVAL-MKI109V2 motherboard for PC-based GUI (Unico) or firmware-driven sensor testing.

For engineers reviewing the STEVAL-MKI123V1 datasheet, STEVAL-MKI123V1 pinout, STEVAL-MKI123V1 application, or STEVAL-MKI123V1 equivalent, this adapter enables rapid prototyping of motion-sensing systems without custom PCB design-especially when integrating LSM330D into host platforms using I²C/SPI interfaces and interrupt-driven data acquisition.

Technical Context

The board routes all 24 pins of the LSM330D-including dual interrupt outputs (INT1_A/INT2_A, INT1_G/DRDY_INT2_G), dedicated CS lines (CS_A, CS_G), shared SDA_A/G, separate SCL and SDO lines for accelerometer and gyroscope, and independent VDD/VDD_IO supplies-to a standard DIL-24 footprint. No level-shifting or signal conditioning is integrated; it is a passive breakout only.

It requires connection to the STEVAL-MKI109V2 motherboard (featuring STM32F103 high-performance 32-bit MCU) to provide USB-to-sensor bridge functionality, real-time register access, and Unico GUI visualization-making it a hardware-enabling component rather than a standalone measurement system.

Key Specifications

Availability

STEVAL-MKI123V1 is available at Aetrix Electronics and suitable for motion sensor evaluation, embedded inertial prototyping, and MEMS interface validation requiring stable component supply and documented ST reference design integration.

Supply support for STEVAL-MKI123V1 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 products for industrial, automotive, and consumer applications.

This adapter belongs to ST's STEVAL (ST Evaluation) platform family, engineered specifically to accelerate development and validation of ST MEMS motion sensors by providing standardized, ready-to-use hardware interfaces to host controllers and PC tools.

FAQ

Is STEVAL-MKI123V1 a standalone sensor module?

No. It is a passive adapter board only-it contains no active sensing elements. The LSM330D IC must be separately mounted (or pre-mounted) on the board. Functionality requires connection to the STEVAL-MKI109V2 motherboard or equivalent host with appropriate firmware and communication drivers.

What software tools are supported for STEVAL-MKI123V1?

ST's Unico GUI is the primary supported tool, downloadable from st.com. It communicates via the STEVAL-MKI109V2's USB interface to configure registers, stream real-time accelerometer/gyroscope data, and visualize motion profiles without custom code development.

Does STEVAL-MKI123V1 support SPI and I²C simultaneously?

Yes. The board exposes separate CS_A/CS_G lines and distinct SDO_A/SDO_G outputs, allowing independent SPI operation for each sensor. SDA_A/G and SCL_A/G are shared but configurable for I²C mode-requiring proper bus arbitration in dual-sensor I²C use.

Can STEVAL-MKI123V1 be used without the STEVAL-MKI109V2 motherboard?

Yes, but only with external host hardware that replicates the required signal routing, power sequencing, and interrupt handling. No onboard voltage regulation, logic-level translation, or USB interface is included-users must supply compatible MCU, drivers, and host-side software stack.