STMicroelectronics STEVAL-MKI231KA

Overview

STEVAL-MKI231KA from STMicroelectronics is an evaluation kit comprising the STHS34PF80 low-power, high-sensitivity infrared (IR) sensor board and a DIL24 adapter board (STEVAL-MKIGIBV5), enabling presence and motion detection with integrated Fresnel lens (TMOS63-10), 3.3 V operation, I²C/SPI interface support, and full compatibility with STEVAL-MKI109D, X-NUCLEO-IKS02A1, and X-NUCLEO-IKS4A1 platforms.

For engineers reviewing the STEVAL-MKI231KA datasheet, STEVAL-MKI231KA pinout, STEVAL-MKI231KA application, or STEVAL-MKI231KA equivalent, this kit delivers ready-to-use IR sensing evaluation with MEMS Studio GUI integration, decoupling capacitors pre-mounted, and plug-and-play connectivity to STM32-based development ecosystems.

Technical Context

The STEVAL-MKI231KA implements a complete hardware interface between the STHS34PF80 IR sensor and host evaluation platforms via a flat cable and DIL24 socket. It exposes all STHS34PF80 pins-including INT1, INT2, SCL, SDA, CS, SDO, SCX, SDX, OSDO, VDD, VDDIO, and OCS-with passive pull-ups and configurable jumpers (JP1/JP2) for signal routing flexibility.

It operates at 3.3 V supply, supports both I²C (7-bit address 0x5A) and SPI (4-wire) communication modes, and integrates a TMOS63-10 Fresnel lens to enhance field-of-view and thermal signal acquisition for human presence detection in ambient temperature ranges from –20 °C to +85 °C.

Key Specifications

Availability

STEVAL-MKI231KA is available at Aetrix Electronics and suitable for industrial presence sensing, smart lighting control, HVAC occupancy monitoring, and IoT edge node development requiring stable component supply and rapid MEMS sensor evaluation.

Supply support for STEVAL-MKI231KA 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/mixed-signal devices for industrial, automotive, and consumer applications.

This kit belongs to ST's Professional MEMS Tools product line, engineered specifically to accelerate evaluation and firmware development for ST's portfolio of motion and environmental sensors using standardized hardware interfaces and unified software tools.

FAQ

What microcontroller platforms is STEVAL-MKI231KA compatible with?

STEVAL-MKI231KA is natively compatible with STEVAL-MKI109D (32-bit ARM Cortex-M4 host), X-NUCLEO-IKS02A1, and X-NUCLEO-IKS4A1 expansion boards. It connects via flat cable to the DIL24 socket on these platforms and requires no hardware modification for I²C or SPI operation.

Does the kit include the Fresnel lens and mounting hardware?

Yes - the STEVAL-MKI231KA kit includes the TMOS63-10 plastic Fresnel lens and a dedicated plastic holder designed to optimize thermal radiation collection for presence detection. The lens is pre-aligned and mechanically secured to the STHS34PF80 PCB for repeatable performance.

How is sensor data acquired and visualized?

Data is acquired via I²C or SPI from the STHS34PF80 and streamed through the host platform (e.g., STEVAL-MKI109D) to a PC running ST's MEMS Studio GUI. This tool provides real-time thermal frame display, FFT analysis, interrupt event logging, and export of raw 12-bit ADC values for algorithm validation.

Can STEVAL-MKI231KA be used without the STEVAL-MKI109D?

Yes - while optimized for use with STEVAL-MKI109D, the kit can interface directly with any microcontroller supporting I²C or SPI and providing 3.3 V logic levels. The DIL24 adapter exposes all STHS34PF80 signals, and schematic diagrams (DB4783) confirm pin mapping for custom host integration.