STMicroelectronics STEVAL-MKI133V1

Overview

STEVAL-MKI133V1 from STMicroelectronics is a DIL-24 socket adapter board for the LSM303D 3-axis accelerometer and 3-axis magnetometer MEMS sensor, providing full pin access, on-board decoupling (10 µF + 100 nF on VDD), and direct compatibility with the STEVAL-MKI109V2 motherboard for PC-based evaluation via Unico GUI.

For engineers reviewing the STEVAL-MKI133V1 datasheet, STEVAL-MKI133V1 pinout, STEVAL-MKI133V1 application, or STEVAL-MKI133V1 equivalent, this adapter enables rapid prototyping of motion-sensing systems using standard DIL-24 footprints, I²C/SPI interface validation, and sensor fusion algorithm development with host MCU bridging.

Technical Context

The board implements a passive breakout interface without active logic or level-shifting circuitry, mapping all 24 pins of the LSM303D-including dual interrupt outputs (INT1/INT2), ADC inputs (ADC1–ADC3), and configurable I²C/SPI control lines (SDA, SCL, SDO, CS)-to a standard 0.6" DIL-24 socket footprint.

It integrates fixed-value decoupling capacitors (10 µF tantalum + 100 nF ceramic on VDD_IO/VDD) and zero-ohm jumpers (R1–R4) to support flexible power domain configuration and signal routing, enabling direct connection to evaluation motherboards or custom carrier boards.

Key Specifications

Availability

STEVAL-MKI133V1 is available at Aetrix Electronics and suitable for motion sensing evaluation, sensor fusion prototyping, and embedded navigation system development requiring stable component supply and documented ST reference design integration.

Supply support for STEVAL-MKI133V1 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 adapter belongs to ST's STEVAL (ST Evaluation) platform family, engineered specifically to accelerate MEMS sensor evaluation and reduce time-to-proof-of-concept for motion-tracking and orientation-aware systems.

FAQ

Does STEVAL-MKI133V1 include the LSM303D sensor IC?

No. The board is a passive adapter only - it provides the socket and routing for the user-supplied LSM303D device. The schematic shows U1 as an empty footprint labeled "LSM303D", confirming no sensor is pre-mounted.

Can STEVAL-MKI133V1 operate standalone without STEVAL-MKI109V2?

No. It lacks onboard MCU, USB interface, or firmware - it requires connection to a host evaluation platform like STEVAL-MKI109V2 to provide power, communication bridging, and GUI interaction.

What voltage levels does the board support for VDD_IO and VDD?

VDD_IO supports 1.8 V to 3.3 V (per LSM303D spec); VDD supports 2.16 V to 3.6 V. The board has no level-shifting circuitry - users must ensure host motherboard supplies correct voltages to matching pins.

Are the ADC input pins (ADC1–ADC3) connected to external test points or routed only internally?

All three ADC pins are fully routed to the DIL-24 socket's edge pins (pins 13–15 per schematic), enabling external analog signal injection or monitoring - no internal termination or filtering is applied beyond the socket footprint.