NXP Semiconductors 8CH-DMIC User Manual
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NXP Semiconductors 8CH-DMIC User Manual

NXP Semiconductors 8CH-DMIC User Manual

Eight-channel dmic board
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NXP Semiconductors
Document identifier: 8CH-DMIC-UM
User Guide
Rev. 2, 15 March 2022
Eight-channel DMIC Board User Manual
Supports Board Revision B

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Summary of Contents for NXP Semiconductors 8CH-DMIC

  • Page 1 NXP Semiconductors Document identifier: 8CH-DMIC-UM User Guide Rev. 2, 15 March 2022 Eight-channel DMIC Board User Manual Supports Board Revision B...

  • Page 2: Table Of Contents

    NXP Semiconductors Contents Chapter 1 Overview....................3 1.1 Acronyms...........................3 1.2 Related documentation......................3 1.3 Kit content..........................4 1.4 Block diagram..........................4 1.5 Board pictures........................... 4 1.6 Board features........................... 6 1.7 Connectors..........................7 1.8 Jumpers.............................8 1.9 LEDs............................11 Chapter 2 Functional Description.................12 2.1 Power supply........................... 12 2.1.1 Main power supply........................

  • Page 3: Chapter 1 Overview

    This document provides the detail about the 11 DMICs and their configurations, jumpers, LEDs, switches, and other interfaces available on the board. Example programs for use of the 8CH-DMIC board can be found in the MCUXpresso SDK software for the EVK being used (see https://mcuxpresso.nxp.com or download the SDK directly from within MCUXpresso IDE).

  • Page 4: Kit Content

    NXP Semiconductors Overview Table 2. Related documentation (continued) Document Description Link/How to access AUD-EVK board interfaces, power supplies, clocks, push buttons, jumpers, and LEDs. 1.3 Kit content The table below describes the items included in the 8-CH DMIC board kit.
  • Page 5 J6, J7, J8, J9, J10, J11, J12, J13 J2, J3, J4 J5, J14, J15 Figure 2. 8CH-DMIC board top side The figure below shows the bottom side of the board, and highlights the interface connector. Eight-channel DMIC Board User Manual, Rev. 2, 15 March 2022...

  • Page 6: Board Features

    NXP Semiconductors Overview Figure 3. 8CH-DMIC board bottom side 1.6 Board features The table below describes the DMIC board features. Eight-channel DMIC Board User Manual, Rev. 2, 15 March 2022 User Guide 6 / 25...

  • Page 7: Connectors

    NXP Semiconductors Overview Table 4. Main features Board feature Processor feature used Description Interfacing with Main board 14-pin connector used for DMIC board connection with the main board Power Input power ranges from 1.8 V Typically, 1.8 V power is used for DMICs, and other interfaces, to 3.3 V...

  • Page 8: Jumpers

    NXP Semiconductors Overview Table 6. Interface connector pin detail (continued) Signal Direction I2C_SCL I2C_SDA 1.8 Jumpers The following table describes the jumpers available on the board. Table 7. Jumpers Part Jumper type Description Settings identifier 1x2 header Jumper for SPH0641LM4H-1 •...
  • Page 9 NXP Semiconductors Overview Table 7. Jumpers (continued) Part Jumper type Description Settings identifier • control the data from • Shorted: Data control and clock control signals for MIC 3 ADG711 (U12) switch and MIC 9 are low, and MIC 3 and MIC 9 are enabled...
  • Page 10 NXP Semiconductors Overview Table 7. Jumpers (continued) Part Jumper type Description Settings identifier • control the data from ADG711 (U20) switch and clock from ADG711 (U19) switch for MIC 6 • control the data from ADG711 (U20) switch and clock from ADG711 (U21) switch for MIC 10 •...

  • Page 11: Leds

    NXP Semiconductors Overview Table 7. Jumpers (continued) Part Jumper type Description Settings identifier NOTE Combination of jumpers J5, J14, and J15 provide several clock selection options. For detail, see Table 1.9 LEDs Total of eight LEDs are available on the 8-CH DMIC board. The table below describes the DMIC board LEDs.

  • Page 12: Chapter 2 Functional Description

    NXP Semiconductors Chapter 2 Functional Description This chapter describes the features and different interfaces of 8-CH DMIC board. 2.1 Power supply This section describes the power supply on 8-CH DMIC board. 2.1.1 Main power supply The 8-CH DMIC board can accept from 1.8 V up to 3.6 V for operation from the main board through J1 interface connector.
  • Page 13 NXP Semiconductors Functional Description MIC9 MIC5 MIC4 6MIC, 7MIC, 8MIC Config: 4MICB, 5MIC Config: MIC0, MIC1, MIC2, MIC3, MIC1, MIC2, MIC7, MIC4, MIC5, MIC6, MIC10 MIC8, MIC10 MIC7 MIC8 MIC0 MIC6 MIC3 2MIC, 3MICA, 3MICC Config: 3MICB, 4MICA Config: MIC0, MIC3, MIC6, MIC9...

  • Page 14: Dmic Configurations And Signal Connections

    NXP Semiconductors Functional Description Table 9. DMIC Array (continued) Part identifier Device Description MIC4 Asserts data on CLK_MIC4 falling edge MIC5 Asserts data on CLK_MIC5 rising edge MIC6 Asserts data on CLK_MIC6 rising and falling edge depending upon jumper J4 setting...
  • Page 15 NXP Semiconductors Functional Description MIC9 MIC5 MIC4 MIC7 MIC8 MIC0 MIC6 MIC3 MIC10 - Indicates active DMIC MIC1 MIC2 - Indicates inctive DMIC Figure 4. 2DMIC configuration 3DMIC[A] configuration Table 11. 3DMIC[A] configuration Part identifier DMIC Active Data and Clock signal...
  • Page 16 NXP Semiconductors Functional Description Table 12. 3DMIC[B] configuration (continued) Part identifier DMIC Active Data and Clock signal DMIC2 DMIC4 DATA23 and CLK23 The figure below shows the 3DMIC[B] configuration. MIC9 MIC5 MIC4 MIC7 MIC8 MIC0 MIC6 MIC3 MIC10 - Indicates active DMIC...
  • Page 17 NXP Semiconductors Functional Description 4DMIC[A] configuration Table 14. 4DMIC[A] configuration Part identifier DMIC Active Data and Clock signal DMIC0 DATA01 and CLK01 DMIC2 DMIC4 DATA23 and CLK23 DMIC6 The figure below shows the 4DMIC[A] configuration. MIC9 MIC5 MIC4 MIC7 MIC8...
  • Page 18 NXP Semiconductors Functional Description MIC9 MIC5 MIC4 MIC7 MIC8 MIC0 MIC6 MIC3 MIC10 - Indicates active DMIC MIC1 MIC2 - Indicates inctive DMIC Figure 9. 4DMIC[B] configuration 5DMIC configuration Table 16. 5DMIC configuration Part identifier DMIC Active Data and Clock signal...
  • Page 19 NXP Semiconductors Functional Description 6DMIC configuration Table 17. 6DMIC configuration Part identifier DMIC Active Data and Clock signal DMIC0 DATA01 and CLK01 DMIC1 DMIC2 DATA23 and CLK23 DMIC3 DMIC4 DATA45 and CLK45 DMIC5 The figure below shows the 6DMIC configuration.
  • Page 20 NXP Semiconductors Functional Description MIC9 MIC5 MIC4 MIC7 MIC8 MIC0 MIC6 MIC3 MIC10 - Indicates active DMIC MIC1 MIC2 - Indicates inctive DMIC Figure 12. 7DMIC configuration 8DMIC configuration Table 19. 8DMIC configuration Part identifier DMIC Active Data and Clock signal...

  • Page 21: Dmic Data Switch

    NXP Semiconductors Functional Description DMIC configuration and jumpers setting The below table describes the jumpers configurations required for different DMIC configurations. Table 20. DMIC configuration and jumpers setting DMIC configuration Jumpers (to be shorted) Note 6 DMIC, 7 DMIC, 8 DMIC...

  • Page 22: Dmic Clock Switch

    2.2.3 DMIC clock switch Four SPST switches (ADG711) are used to switch clocks coming from the main board as an input to different DMICs on the 8CH-DMIC board. The following table describes the clock switches. Table 22. DMIC clock switch matrix...
  • Page 23 CLK01 NOTE When using the 8CH-DMIC board with the i.MX RT600 EVK (MIMXRT685-AUD-EVK) board, the codec device on the MIMXRT685-AUD-EVK board must have the MCLK clock frequency reduced to 4.096 MHz and the Input Sample Rate (LRCK) must be reduced to 16 kHz. This change in clock frequency and LRCK maintains compliance of the MIMXRT685-AUD-EVK board with mandatory FCC and EU EMC limitations.

  • Page 24: Appendix A Revision History

    NXP Semiconductors Appendix A Revision history The table below summarizes the revisions to this document. Table 24. Revision history Revision Date Topic cross-reference Change description Rev. 2 15 March 2022 Clock configuration jumper Added note. settings Rev. 1 12 January 2022 - Initial public release.
  • Page 25 Right to make changes - NXP Semiconductors reserves the right to make changes to information published in this document, including without limitation specifications and product descriptions, at any time and without notice. This document supersedes and replaces all information supplied prior to the publication hereof.

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