SLAU904A October   2023  – December 2023

 

  1.   1
  2.   Description
  3.   Get Started
  4.   Features
  5.   Applications
  6.   6
  7. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specification
    4. 1.4 Device Information
  8. 2Hardware
    1. 2.1 Setup
    2. 2.2 AC-MB Settings
      1. 2.2.1 Audio Serial Interface Settings
        1. 2.2.1.1 USB Mode
        2. 2.2.1.2 Optical or Auxiliary Analog Audio Input Mode
        3. 2.2.1.3 External Audio Interface Mode
      2. 2.2.2 AC-MB Power Supply
    3. 2.3 TAx5x42EVM-K Hardware Settings
      1. 2.3.1 TAx5x42 EVM Input Hardware Settings
        1. 2.3.1.1 Line Inputs
        2. 2.3.1.2 On-board Microphone Input
      2. 2.3.2 TAx5x42 EVM Output Hardware Settings
        1. 2.3.2.1 TAx5x42 Analog Audio Output
      3. 2.3.3 Multi-Function Hardware Configurations
        1. 2.3.3.1 MD0 Hardware Configurations
        2. 2.3.3.2 MD1 and MD2 Hardware Configurations
        3. 2.3.3.3 MD3 Hardware Configurations
        4. 2.3.3.4 MD4 and MD5 Hardware Configurations
        5. 2.3.3.5 MD6 (DIN/DOUT) Hardware Configuration
  9. 3Software
    1. 3.1 System Overview
    2. 3.2 Configuration Example
  10. 4Hardware Design Files
    1. 4.1 Schematics
    2. 4.2 PCB Layout
    3. 4.3 Bill of Materials (BOM)
      1. 4.3.1 TAC5242 EVM Bill of Materials
      2. 4.3.2 TAC5142 EVM Bill of Materials
      3. 4.3.3 TAA5242 EVM Bill of Materials
      4. 4.3.4 TAD5242 EVM Bill of Materials
      5. 4.3.5 TAD5142 EVM Bill of Materials
  11. 5Additional Information
    1. 5.1 Trademarks
  12. 6References
  13. 7Revision History

2.2.2 AC-MB Power Supply

The complete EVM system is powered from a single 5-V power supply. However, the motherboard has different low-dropout regulators (LDOs) integrated that provide the required power supplies to the different blocks of the board. Figure 3-7 shows a block diagram depicting the power structure of the AC-MB.

GUID-20230627-SS0I-NCC5-JKXZ-J4PGSCRMFH02-low.svgFigure 2-7 Power-Supply Distribution of the AC-MB

The AC-MB can be powered from the host computer by using the USB 5-V power supply (VBUS) by shorting header J5, USB POWER. Additionally, the AC-MB can be powered from an external power supply connected to terminal J4, EXTERNAL POWER. Header J5 must be open for external supply operation. The IOVDD voltage for the digital signals that is provided to the evaluation module is generated on the motherboard from the main power supply (USB or external).

The voltage levels available are 1.2V, 1.8 V and 3.3 V, and can be selected via the J9, J3 header IOVDD. For 1.2-V operation, short pin 1 of header J9 and pin 2 of header J3, for 1.8-V operation, short pins 2 and 3 of header J3; for 3.3-V operation, short pins 1 and 2 of header J3. When the motherboard is fully powered and the power supplies from the onboard LDOs are correct, the green POWER LED (D3) turns ON. The USB READY LED indicates that a successful USB communication is established between the AC-MB and the host computer.