STMicroelectronics STEVAL-MKI111V1

Overview

STEVAL-MKI111V1 from STMicroelectronics is an evaluation board for the LSM6DSL 6-axis inertial measurement unit (IMU), integrating a 3-axis gyroscope and 3-axis accelerometer in a single LGA-14 package. It supports I²C and SPI digital interfaces, delivers ±2000 dps gyroscope full scale and ±16 g accelerometer full scale, and enables real-time motion sensing for wearable and IoT edge devices.

For engineers reviewing the STEVAL-MKI111V1 datasheet, STEVAL-MKI111V1 pinout, STEVAL-MKI111V1 application, or STEVAL-MKI111V1 equivalent, this board provides validated hardware reference design, onboard voltage regulation (LD1117-3.3), direct microcontroller interface via Arduino UNO R3 headers, and firmware-ready connectivity for rapid sensor characterization and algorithm development.

Technical Context

The board implements the LSM6DSL IMU in its default configuration with embedded FIFO, programmable ODR up to 6.6 kHz, and interrupt-driven event detection (free-fall, wake-up, step counter). Power is supplied via USB or external 5 V, regulated to 3.3 V using an LD1117-3.3 low-dropout linear regulator.

All sensor signals are routed to dual-row 1×18 male headers compatible with Arduino UNO R3 footprint, enabling plug-and-play integration with STM32 Nucleo, Discovery, and third-party MCU platforms. The board includes solder jumpers for I²C/SPI mode selection and VDD/VDDIO voltage configuration.

Key Specifications

Availability

STEVAL-MKI111V1 is available at Aetrix Electronics and suitable for industrial IoT sensor node validation, wearable motion algorithm prototyping, and automotive infotainment gesture interface development requiring stable component supply and documented reference hardware.

Supply support for STEVAL-MKI111V1 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.

The STEVAL-MKI111V1 belongs to ST's STEVAL sensor evaluation platform family, engineered to accelerate time-to-proof-of-concept for MEMS-based motion sensing solutions across portable, medical, and smart infrastructure systems.

FAQ

Does STEVAL-MKI111V1 support both I²C and SPI simultaneously?

No. The board uses a solder jumper (SJ1) to select either I²C or SPI mode - not both concurrently. I²C is the factory-default configuration. SPI requires reconfiguring SJ1 and updating firmware to use the alternate pin mapping defined in the LSM6DSL datasheet.

What is the maximum sampling rate achievable with this board?

The LSM6DSL on STEVAL-MKI111V1 supports combined gyroscope and accelerometer output data rates up to 6.6 kHz in high-performance mode. Actual sustained rate depends on host MCU throughput, interface clock speed (I²C up to 400 kHz, SPI up to 10 MHz), and FIFO usage.

Is external power required, or does USB provide sufficient supply?

USB 5 V supply is fully sufficient: the onboard LD1117-3.3 regulator delivers clean 3.3 V to the LSM6DSL and interface circuitry. No external power is needed unless operating in high-current test scenarios exceeding 800 mA total load - which exceeds typical IMU operation.

Can STEVAL-MKI111V1 be used with non-ST microcontrollers?

Yes. Its Arduino UNO R3 pinout and standard 3.3 V logic levels enable direct connection to ESP32, nRF52, Raspberry Pi Pico, and other 3.3 V–compatible MCUs. ST-provided drivers are written in C and portable; only I²C/SPI peripheral initialization needs adaptation.