ST STEVAL-STWINMA2 User Manual
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ST STEVAL-STWINMA2 User Manual

ST STEVAL-STWINMA2 User Manual

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UM3098
User manual
Getting started with the industrial analog microphone array expansion for STWIN
Introduction
The
STEVAL-STWINMA2
microphone array expansion adds advanced audio sensing capabilities to the
STEVAL-STWINKT1B
(and STEVAL-STWINKT1) SensorTile Wireless Industrial Node (STWIN) kit for high frequency vibration monitoring applications.
The board includes four low-power, high signal-to-noise ratio (SNR)
IMP23ABSU
capacitive sensing microphones, supported by
a very low drop voltage, low quiescent current, and low-noise voltage regulator, ideal for battery-powered applications such as
STWIN.
The expansion board is connected via a dedicated 12-pin connector to the core system board.
The combination of STWIN and
STEVAL-STWINMA2
is supported thanks to the software examples provided within the
X-CUBE-MEMSMIC1
expansion software package for STM32Cube.
The package includes one example of microphone data steaming via USB and one example of ultrasound condition monitoring
(UltrasoundFFT) that calculates the FFT of the analog microphone signal and streams the result to a PC GUI via USB.
The microphone sampling rate is set by default to 192 kHz whereas the microphone bandwidth is up to 80 kHz.
Figure 1.
STEVAL-STWINMA2 board
UM3098 - Rev 1 - May 2023
www.st.com
For further information contact your local STMicroelectronics sales office.

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Summary of Contents for ST STEVAL-STWINMA2

  • Page 1 (UltrasoundFFT) that calculates the FFT of the analog microphone signal and streams the result to a PC GUI via USB. The microphone sampling rate is set by default to 192 kHz whereas the microphone bandwidth is up to 80 kHz. Figure 1. STEVAL-STWINMA2 board UM3098 - Rev 1 - May 2023 www.st.com...

  • Page 2: Features

    UM3098 Features Features • Analog microphone array expansion for STEVAL-STWINKT1B (and STEVAL-STWINKT1) • Connects to the STWIN core system board through a dedicated 12-pin connector • 3 V to 5.5 V power supply input • 4 mm square-shaped differential microphone array •...

  • Page 3: Precautions For Use

    UM3098 Precautions for use Precautions for use Important: The STEVAL.STWINMA2 evaluation board has a level of radiated emissions in Class A. Regarding immunity, the board is not immune to indirect electrostatic discharges (electrostatic discharges applied to objects adjacent to the board). During the ESD test the board obtained level C, meaning that the board was not damaged during the test, but requires the intervention of the operator to reset it.

  • Page 4: How To Use The Board

    The shape of the connector makes it impossible to plug the board with the wrong orientation (see the figure below). Figure 3. STWIN core system board and STEVAL-STWINMA2 (or STEVAL-STWINMAV1) The three firmware examples that allow you to test the development board can be found in the X-CUBE-...

  • Page 5: Schematic Diagrams

    Schematic diagrams Figure 4. STEVAL-STWINMA2 schematic - Mics, VDD and connector MP23ABS1 MP23ABS1 D3V3 DOUT DOUT 100nF 100nF Analog Mics 3.3 to 5.5 V MP23ABS1 MP23ABS1 DOUT DOUT 100nF 100nF SAI_MCLK SAI_SD SAI_SCK I2C_SDA SAI_FS I2C_SCL M55-7001242R LDK130M-R Connector 110k...
  • Page 6 Figure 5. STEVAL-STWINMA2 schematic - ADC 100nF 100nF 100nF 100nF 100nF 100nF 100nF 100nF 4.87k D3V3 2200pF Place close to AVDD1, AVDD2, AVDD3 pins ADAU1978 AGND1 39nF VREF AGND6 PLL_FILT AGND5 AVDD2 AGND2 100nF 100nF 100nF 10uF PD_RST SAI_MCLK MCLKIN...

  • Page 7: Bill Of Materials

    UM3098 Bill of materials Bill of materials Table 1. STEVAL-STWINMA2 bill of materials Item Q.ty Ref. Part/value Description Manufacturer Order code M55-7001242R, M55 series 12 Harwin M55-7001242R pin connector 39nF, C_0402, CAP CER 39nF Vishay VJ0402Y393KXQCW1BC 10V X5R 0402 C2, C3, C4, C5,...

  • Page 8: Board Versions

    UM3098 Board versions Board versions Table 2. STEVAL-STWINMA2 versions PCB version Schematic diagrams Bill of materials STEVAL$STWINMA2A STEVAL$STWINMA2A schematic diagrams STEVAL$STWINMA2A bill of materials 1. This code identifies the SSTEVAL-STWINMA2 evaluation board first version. It is printed on the board PCB.

  • Page 9: Regulatory Compliance Information

    UM3098 Regulatory compliance information Regulatory compliance information Notice for US Federal Communication Commission (FCC) For evaluation only; not FCC approved for resale FCC NOTICE - This kit is designed to allow: (1) Product developers to evaluate electronic components, circuitry, or software associated with the kit to determine whether to incorporate such items in a finished product and (2) Software developers to write software applications for use with the end product.

  • Page 10: Revision History

    UM3098 Revision history Table 3. Document revision history Date Revision Changes 11-May-2023 Initial release. UM3098 - Rev 1 page 10/14...

  • Page 11: Table Of Contents

    UM3098 Contents Contents Features................2 Precautions for use .

  • Page 12: List Of Tables

    STEVAL-STWINMA2 bill of materials ........

  • Page 13: List Of Figures

    STEVAL-STWINMA2 schematic - Mics, VDD and connector........
  • Page 14 ST’s terms and conditions of sale in place at the time of order acknowledgment. Purchasers are solely responsible for the choice, selection, and use of ST products and ST assumes no liability for application assistance or the design of purchasers’...

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