STMicroelectronics STEVAL-MKI188V1

Overview

STEVAL-MKI188V1 from STMicroelectronics is an evaluation adapter board designed for the L20G20IS MEMS gyroscope, providing full DIL-24 socket compatibility, on-board decoupling capacitors (100 nF ×3), and direct plug-in capability with the STEVAL-MKI109V3 motherboard. It enables rapid prototyping and sensor-level characterization in user-defined systems.

For engineers reviewing the STEVAL-MKI188V1 datasheet, STEVAL-MKI188V1 pinout, STEVAL-MKI188V1 application, or STEVAL-MKI188V1 equivalent, this board serves as a hardware interface to evaluate L20G20IS gyroscope functionality-including SPI/I²C communication, interrupt signaling (INT1, DRDY), and dual-supply operation (VDD, VDD_IO) -within ST's Unico GUI or custom firmware environments.

Technical Context

The STEVAL-MKI188V1 implements a passive breakout interface between the L20G20IS MEMS gyroscope and host evaluation infrastructure. It maps all 24 pins of the L20G20IS DIL-24 package-including power (VDD, VDD_IO, GND), digital I/O (CS, SCL, SDI/SDO, SDO, INT1, DRDY), and NC-without signal conditioning or level translation.

It relies entirely on the STEVAL-MKI109V3 motherboard for microcontroller-based bridge functionality, USB-to-SPI/I²C conversion, and PC communication. No onboard active components or firmware are present; the board functions solely as a mechanical and electrical extension of the sensor's native pinout.

Key Specifications

Availability

STEVAL-MKI188V1 is available at Aetrix Electronics and suitable for MEMS sensor evaluation, industrial motion prototyping, and embedded inertial system development requiring stable component supply and traceable STMicroelectronics reference hardware.

Supply support for STEVAL-MKI188V1 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) product line, engineered specifically to accelerate customer adoption of ST MEMS motion sensors by providing standardized, ready-to-use hardware interfaces compatible with their ecosystem of motherboards and software tools.

FAQ

Does STEVAL-MKI188V1 include firmware or a microcontroller?

No. The board contains only passive components: three 100 nF decoupling capacitors and a DIL-24 footprint for the L20G20IS sensor. All processing, communication bridging, and GUI interaction depend on the external STEVAL-MKI109V3 motherboard and its integrated 32-bit microcontroller.

Can STEVAL-MKI188V1 be used without the STEVAL-MKI109V3 motherboard?

Yes, but only in custom host systems. The board exposes all L20G20IS signals (CS, SCL, SDI/SDO, SDO, INT1, DRDY, VDD, VDD_IO, GND), allowing connection to third-party MCUs or logic analyzers - provided appropriate voltage levels, timing, and protocol implementation are handled externally.

What is the purpose of the JP1 and JP2 jumpers shown in the schematic?

JP1 and JP2 are unpopulated test points labeled "GND" in the schematic - they serve as ground access points for probing or optional grounding extensions, not functional jumpers. No configuration or soldering is required for standard operation with the STEVAL-MKI109V3.

Is the L20G20IS sensor pre-mounted on the STEVAL-MKI188V1 board?

No. The board is supplied as a bare adapter PCB with a DIL-24 socket footprint. Users must separately source and manually insert the L20G20IS MEMS gyroscope IC into the socket - no sensor is included or pre-soldered.