STMicroelectronics STEVAL-MKI191V1

Overview

STEVAL-MKI191V1 from STMicroelectronics is a DIL24-socket-compatible adapter board for the IIS2DLPC 3-axis ultralow-power accelerometer, enabling rapid evaluation and system integration in industrial sensor applications. It provides full pin access (including INT1, INT2, CS, SCL, SDA, SA0, VDD, VDDIO, GND), onboard 10 µF and dual 100 nF decoupling capacitors, and direct compatibility with the STEVAL-MKI109D evaluation platform.

For engineers reviewing the STEVAL-MKI191V1 datasheet, STEVAL-MKI191V1 pinout, STEVAL-MKI191V1 application, or STEVAL-MKI191V1 equivalent, this board serves as a validated hardware interface to accelerate MEMS sensor prototyping, firmware validation, and signal integrity assessment in industrial motion-sensing systems.

Technical Context

The STEVAL-MKI191V1 implements a passive breakout architecture: it maps all 12 pins of the IIS2DLPC's LGA-12 package to a standard 24-pin DIL socket footprint, preserving native I²C/SPI signal routing and interrupt functionality. Power delivery includes dedicated VDD (2.18–3.6 V) and VDDIO (1.71–3.6 V) rails with discrete ceramic decoupling.

It functions exclusively as a mechanical and electrical interface - no active logic, level-shifting, or signal conditioning is integrated. Its design assumes use with the STEVAL-MKI109D host platform, which supplies MCU-controlled communication, power regulation, and USB-to-sensor data bridging via MEMS Studio software.

Key Specifications

Availability

STEVAL-MKI191V1 is available at Aetrix Electronics and suitable for industrial condition monitoring, predictive maintenance subsystems, and MEMS-based tilt/impact sensing requiring stable component supply and rapid evaluation turnaround.

Supply support for STEVAL-MKI191V1 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 markets.

The STEVAL-MKI191V1 belongs to ST's Professional MEMS Tools product line - engineered to provide standardized, low-friction evaluation paths for its industrial-grade MEMS motion sensors, reducing time-to-first-data for system integrators.

FAQ

Does STEVAL-MKI191V1 include an onboard microcontroller?

No. The STEVAL-MKI191V1 is a passive adapter board with no embedded processor. It requires connection to the STEVAL-MKI109D evaluation platform (which contains a 32-bit STM32 MCU) or a compatible host system to enable sensor communication, configuration, and data acquisition via I²C or SPI.

What voltage levels does STEVAL-MKI191V1 support for VDD and VDDIO?

VDD accepts 2.18–3.6 V for core sensor operation; VDDIO supports 1.71–3.6 V for I/O interface compatibility. These ranges match the IIS2DLPC's specifications and are implemented with separate power pads and decoupling - no onboard regulation or level translation is provided.

Can STEVAL-MKI191V1 be used independently without STEVAL-MKI109D?

Yes, but only with external host control. The board exposes all sensor signals directly to the DIL24 socket, allowing connection to custom microcontroller boards or test fixtures. However, MEMS Studio GUI support and pre-validated firmware drivers require the STEVAL-MKI109D bridge platform.

Is the pinout of STEVAL-MKI191V1 identical to the IIS2DLPC LGA-12 package?

No - it maps the 12-pin LGA-12 signal set onto a 24-pin DIL socket footprint using duplicated GND pins and defined signal assignments (e.g., Pin 1 = GND, Pin 2 = RES, Pin 3 = SCL/SPC). The mapping follows ST's documented DIL24 breakout convention for MEMS adapters, not a 1:1 pin count match.