STMicroelectronics STEVAL-MKI035V1

Overview

STEVAL-MKI035V1 from STMicroelectronics is a MEMS analog/digital demonstration board for the LPR530AL dual-axis ±300°/s and ±1200°/s pitch-and-roll gyroscope, featuring on-board ST72651AR6 USB microcontroller, analog output connectors, and dual-mode operation (AWM/DWM) for rapid sensor evaluation in inertial measurement applications.

For engineers reviewing the STEVAL-MKI035V1 datasheet, STEVAL-MKI035V1 pinout, STEVAL-MKI035V1 application, or STEVAL-MKI035V1 equivalent, this kit supports real-time analog signal access, PC-based GUI visualization via USB, digital register control, and mode-selectable interface configuration without external hardware.

Technical Context

The board implements two mutually exclusive operational modes: Analog Working Mode (AWM), where the ST72651AR6 is disabled and raw analog outputs (X/Y axis) are routed directly to header pins; and Digital Working Mode (DWM), where the microcontroller acquires, digitizes, and transmits sensor data over USB while managing control signals like RESET and SEL.

Signal conditioning includes dedicated low-pass filters for each analog output channel, voltage reference stabilization for ADC accuracy, and configurable power supply paths (USB or external 5 V). The LPR530AL sensing element interfaces via analog voltage outputs proportional to angular rate, with scale factors of 1.6 mV/(°/s) at ±300°/s range and 0.4 mV/(°/s) at ±1200°/s range.

Key Specifications

Availability

STEVAL-MKI035V1 is available at Aetrix Electronics and suitable for inertial navigation prototyping, robotics stabilization testing, and academic MEMS sensor education requiring stable component supply and immediate out-of-box evaluation capability.

Supply support for STEVAL-MKI035V1 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 board belongs to ST's STEVAL (ST Evaluation) platform family, engineered specifically to accelerate development and validation of ST MEMS motion sensors through plug-and-play hardware, standardized firmware, and integrated software tools.

FAQ

What are the two working modes of the STEVAL-MKI035V1 and how are they selected?

The board operates in Analog Working Mode (AWM) or Digital Working Mode (DWM). AWM is default on power-up and disables the ST72651AR6 to expose raw analog outputs directly. DWM activates the microcontroller for USB communication and requires jumper configuration per the schematic - no software command toggles the mode.

Does the STEVAL-MKI035V1 require external drivers or custom firmware to function?

No external drivers are needed beyond standard Windows USB CDC drivers. The ST72651AR6 runs pre-flashed firmware that enumerates as a virtual COM port. The GUI software - downloadable from ST's official site - handles all communication; no user firmware development is required for basic operation.

Can the full-scale range of the LPR530AL be changed during operation on this board?

No. Full-scale range selection (±300°/s or ±1200°/s) is set by soldering specific resistor values on the board per the schematic (RVFLQ/RVFRXW), not by digital register writes. This is a hardware-configured parameter fixed at assembly time.

Is the STEVAL-MKI035V1 still in active production and supported by ST?

No. ST has marked STEVAL-MKI035V1 as obsolete (per Doc ID 16777 Rev 1, November 2009). While functional and available through legacy distribution channels, ST no longer manufactures or provides updated firmware/GUI versions for this specific board.