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

5 Master Mode Operation

To operate ADCx120Q1EVM-PDK in master mode, S1 and S0 on the AC-MB must first be set to "External ASI" as illustrated in Figure 2-4.

The device does not have a dedicated MCLK pin, the master clock can be applied at GPIO1, IN2P_GPI1, or MICBIAS_GPI2. Since GPI1 and GPI2 are multipurpose pins shared with analog inputs and MICBIAS, using them as the MCLK input limits the devices functionality. It is recommended to use the GPIO1 pin for MCLK.

To use GPIO1 as MCLK the MCLK signal must either be applied at the J10 terminal, or at the "External ASI" header on the AC-MB board with the other clocks. To use the "External ASI" header, it is necssary to install a 0-Ohm resistor at R11 on the EVM, which is depopulated by default.