SBAU398 March   2022

 

  1.   Trademarks
  2. 1Introduction
  3. 2Hardware Overview
    1. 2.1 AC-MB Settings
      1. 2.1.1 Audio Serial Interface Settings
        1. 2.1.1.1 USB
        2. 2.1.1.2 Optical or Auxilary Analog Audio Input
        3. 2.1.1.3 External
      2. 2.1.2 AC-MB Power Supply
    2. 2.2 ADCx120Q1EVM-PDK Hardware Settings
      1. 2.2.1 Line Inputs
      2. 2.2.2 Onboard Microphone Configuration
      3. 2.2.3 External Microphone Configurations
  4. 3Software Overview
    1. 3.1 PurePath Console 3 Installation
    2. 3.2 ADCx120Q1EVM GUI Installation
      1. 3.2.1 Software Setup
  5. 4GPIO1 Settings
  6. 5Master Mode Operation
  7. 6Quick Start
    1. 6.1 Configuring the Audio Serial Bus for the I2S Output
    2. 6.2 Saving a Configuration
  8. 7Schematic and Bill of Materials
    1. 7.1 ADCx120Q1EVM-PDK Schematic and Bill of Materials
      1. 7.1.1 ADCx120Q1EVM-PDK Schematic
      2. 7.1.2 ADCx120Q1EVM-PDK Bill of Materials
    2. 7.2 AC-MB Schematic and Bill of Materials
      1. 7.2.1 AC-MB Schematic
      2. 7.2.2 AC-MB Bill of Materials
    3. 7.3 Matlab Audio Capture Example

6 Quick Start

Configure the AC-MB for the USB audio (TDM) and the PCMx120-Q1EVB for the onboard microphone inputs.

The GUI comes with preset files to that can be used for easy initial setup. Select the Load preset option in the top corner of the GUI and load the On Board Microphone setting, as shown in Figure 6-1 and Figure 6-2. Be sure to populate the jumpers described in the settings as described in Table 2-1.

GUID-4467B4B5-23B0-4141-B9F3-9EB1C4F37240-low.gifFigure 6-1 Loading Presets
GUID-EADD3C07-6402-44C8-9D5E-DEF8EF7DFF30-low.gifFigure 6-2 Onboard Mic Preset

As shown in Figure 6-3, make sure AVDD is selected for the MIC bias voltage and powered up.

GUID-2BD77B5F-CF04-4033-A5A1-4B64CD728DF1-low.gifFigure 6-3 MIC Bias Configuration

The default state for the PCMx120-Q1 is standby mode and, with the exception of the channel digital volume, all device configurations must be done in standby mode. The PCMx120-Q1 does not provide a digital audio output in standby mode. Figure 6-4 shows how to change the mode from standby to active.

GUID-04867EB5-4085-4000-9617-4CEAAE331E6C-low.gifFigure 6-4 Standby to Active Mode

When active mode is enabled, any controls not configurable in active mode are grayed out. These controls can be changed again when the device is brought out of active mode. Figure 6-5 shows which controls are disabled.

GUID-20220401-SS0I-L2R2-TJ6G-PVVSZBHJHCDR-low.png Figure 6-5 Disabled Controls in Active Mode

Audio can now be captured on your PC using the audio program of your choice.