STMicroelectronics STEVAL-MIC001V1

Overview

STEVAL-MIC001V1 from STMicroelectronics is a daughterboard expansion module featuring four MP34DT05-A top-port digital MEMS microphones, designed for PDM audio capture with 64 dB SNR, -26 dBFS ±3 dB sensitivity, and 122.5 dBSPL acoustic overload point, used with X-NUCLEO-CCA02M1 for NBW algorithm detection in voice-enabled edge devices.

For engineers reviewing the STEVAL-MIC001V1 datasheet, STEVAL-MIC001V1 pinout, STEVAL-MIC001V1 application, or STEVAL-MIC001V1 equivalent, key considerations include PDM interface compatibility with STM32-based CCA02M1, supply voltage range (1.6–3.6 V), omnidirectional response, RoHS compliance, and board-level integration for multi-mic array preprocessing.

Technical Context

The STEVAL-MIC001V1 implements a fixed-function microphone array interface, routing four independent PDM outputs (DATA1–DATA4) and shared clock (CLK) and L/R select signals to the host carrier board via a 6-pin header (J1). Each MP34DT05-A microphone operates synchronously under common clock control, enabling time-aligned sampling for beamforming or noise suppression algorithms.

No on-board signal processing is performed; the board serves purely as a physical interface and power distribution layer for the four MEMS elements, with decoupling capacitors (1 µF and 100 nF) placed per microphone supply path to ensure stable 1.6–3.6 V operation and low-noise PDM output integrity.

Key Specifications

Availability

STEVAL-MIC001V1 is available at Aetrix Electronics and suitable for voice interface development, far-field speech recognition prototyping, and multi-microphone algorithm validation requiring stable component supply and NXP/ST ecosystem interoperability.

Supply support for STEVAL-MIC001V1 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 analog, MCU, power, and sensor solutions for industrial, automotive, and consumer applications.

This daughterboard belongs to ST's STEVAL evaluation platform family, engineered to accelerate hardware validation of ST sensor and audio IP-specifically enabling rapid integration of MP34DT05-A microphone arrays into STM32-based voice processing systems.

FAQ

Does STEVAL-MIC001V1 include onboard signal processing or filtering?

No. The board contains no DSP, ADC, or filtering circuitry. It functions solely as a mechanical and electrical interface for four MP34DT05-A microphones, delivering raw PDM bitstreams directly to the host board's digital input pins. Signal conditioning and decoding must be implemented externally, typically in the STM32 microcontroller's DFSDM peripheral.

What is the required host board for STEVAL-MIC001V1 operation?

STEVAL-MIC001V1 is mechanically and electrically designed to mount exclusively onto the X-NUCLEO-CCA02M1 expansion board. It relies on that board for power regulation, clock generation, and PDM-to-I²S/PCM conversion; standalone operation is not supported.

Can the four microphones operate independently with different sample rates?

No. All four MP34DT05-A microphones share a common master clock (CLK) and L/R line, enforcing synchronous sampling at identical rates. The PDM interface does not support individual clocking or asynchronous operation-timing is fully coordinated by the host carrier board.

Is STEVAL-MIC001V1 compatible with non-ST microcontrollers?

Electrical compatibility exists (3.3 V-tolerant PDM signals), but mechanical and firmware integration is optimized for STM32 MCUs using the X-NUCLEO-CCA02M1. Users must implement custom PDM decimation logic and timing control, as ST-provided drivers assume DFSDM peripheral usage on STM32L4/L5/H7 series.