SBAU479 December   2024 TAA3020

 

  1.   1
  2. 1Features
  3. 2Description
  4.   Trademarks
  5. 3Evaluation Module Overview
    1. 3.1 Introduction
    2. 3.2 Kit Contents
    3. 3.3 Specifications
    4. 3.4 Device Information
  6. 4Hardware Overview
    1. 4.1 AC-MB Settings
      1. 4.1.1 Audio Serial Interface Settings
        1. 4.1.1.1 USB
        2. 4.1.1.2 Optical or Auxilary Analog Audio Input
        3. 4.1.1.3 External
      2. 4.1.2 AC-MB Power Supply
    2. 4.2 TAA3020EVM-PDK Hardware Settings
      1. 4.2.1 Line Inputs
      2. 4.2.2 Onboard Microphone Configuration
      3. 4.2.3 External Microphone Configurations
  7. 5Software Overview
    1. 5.1 PurePath Console 3 Installation
    2. 5.2 TAA3020EVM GUI Installation
      1. 5.2.1 Software Setup
  8. 6GPIO1 Settings
  9. 7Master Mode Operation
  10. 8Quick Start
    1. 8.1 Configuring the Audio Serial Bus for the I2S Output
    2. 8.2 Saving a Configuration
  11. 9Schematic and Bill of Materials
    1. 9.1 TAA3020EVM-PDK Schematic and Bill of Materials
      1. 9.1.1 TAA3020EVM-PDK Schematic
      2. 9.1.2 TAA3020EVM-PDK Bill of Materials
    2. 9.2 AC-MB Schematic and Bill of Materials
      1. 9.2.1 AC-MB Schematic
      2. 9.2.2 AC-MB Bill of Materials
    3. 9.3 Matlab Audio Capture Example

4.2.3 External Microphone Configurations

The TAA3020 family of devices support both analog and digital PDM inputs with up to 2 channels of analog input or 4 channels of digital PDM input. It is also possible to use various combinations of analog and digital inputs with up to 2 analog inputs and 2 digital inputs operating simultaneously.

Single-ended or differential analog inputs can be applied on the following pin pairs: IN1P, IN1M, IN2P_GPI1, IN2M_GPO1.

Digital PDM inputs can be applied to the following pins: IN2P_GPI1, MICBIAS_GPI2, GPIO1. A PDM clock can also be output on pins: IN2M_GPO1, GPIO1.

On the EVM access to these pins is provided on terminals J1, J2, J3, and J10. Figure 4-10, Figure 4-11, and Figure 4-12 illustrate the recommended pin connections for common use-cases.

Note, the GPIO1 pin is referenced to the IOVDD domain while IN2P_GPI1, MICBIAS_GPI2, and IN2M_GPO1 are all referenced to AVDD. Thus, if using 2 analog mics in addition to digital mics it is recommended that AVDD and IOVDD be set to the same voltage or a level translator be placed between GPIO1 and the digital microphone. If only 1 analog mic is used then it is recommended to use IN1P and IN1M for the analog mic. If digital mics are used, it is recommended to use IN2M_GPO1 to generate the PDMCLK signal.

TAA3020 External Mics: 2x Analog MicrophonesFigure 4-10 External Mics: 2x Analog Microphones
TAA3020 External Mics: 4x Digital MicrophonesFigure 4-11 External Mics: 4x Digital Microphones
TAA3020 External Mics: 2x Analog and 2x Digital MicrophonesFigure 4-12 External Mics: 2x Analog and 2x Digital Microphones