Texas Instruments DEM-DAI3793A User Manuals

Table of Contents

• Table of Contents

  3
• Preface

  9
• 1 Description

  11
  • 1.1 Introduction—PCM3793A/94A

    12
    • 1.1.1 Key Features

      12
  • 1.2 Pin Assignments and Terminal Functions

    14
  • 1.3 DEM-DAI3793A/3794A EVM Description

    15
• 2 Getting Started

  17
  • 2.1 Electrostatic Discharge Warning

    18
  • 2.2 Unpacking the EVM

    18
  • 2.3 Default Configuration

    19
• 3 Set-Up Guide

  21
  • 3.1 Basic Operating Set-Up

    22
  • 3.2 Software Control and Operation

    22
    • 3.2.1 User Interface Panel

      22
    • 3.2.2 Power On/Off Sequence

      23
    • 3.2.3 Module Function Controls

      23
      • 3.2.3.1 Power Up/Down

        24
      • 3.2.3.2 Record

        26
      • 3.2.3.3 Playback

        28
      • 3.2.3.4 ALC (Automatic Level Control)

        30
      • 3.2.3.5 Signal Processing I

        31
      • 3.2.3.6 Signal Processing 2

        34
      • 3.2.3.7 Analog Path

        35
      • 3.2.3.8 Audio Interface

        37
      • 3.2.3.9 Status Detect

        38
      • 3.2.3.10 Digital Amplifier

        39
    • 3.2.4 LC89052T (DIR: Digital Audio I/F Receiver) Control Window

      39
      • 3.2.4.1 Audio Clock/Data Control Options

        39
    • 3.2.5 Register Setting History

      40
      • 3.2.5.1 Modifying a .csv File

        41
    • 3.2.6 Register Direct Access

      42
• 4 Switches and Connectors

  43
  • 4.1 Overview

    44
  • 4.2 Motherboard

    44
  • 4.3 Daughter Card #1 (PCM3793A)

    46
  • 4.4 Daughter Card #2 (DIR: LC89052T and DIT: DIT4096)

    48
• 5 Evaluation and Measurements

  49
  • 5.1 Slave Mode With Audio Precision SYS-2722 (Default Setting)

    50
  • 5.2 Master Mode with Audio Precision SYS-2722

    52
  • 5.3 Combined Master and Slave Modes With PSIA-2722

    54
  • 5.4 Measurements for Dynamic Characteristics

    55
    • 5.4.1 Digital-to-Analog (D/A) Performance

      56
    • 5.4.2 Analog-to-Digital (A/D) Performance

      57
    • 5.4.3 Speaker Output Power Performance

      57
      • 5.4.3.1 LC Low-Pass Filter

        58
    • 5.4.4 Amplitude Versus Frequency Performance

      59
      • 5.4.4.1 A/D Spectrum

        59
      • 5.4.4.2 D/A Spectrum

        60
  • 5.5 Connection Diagram for Practical Applications

    61
    • 5.5.1 Filter Consideration for Speaker Output

      62
• 6 Schematic, PCB Layout, and Bill of Materials

  63
  • 6.1 Schematics

    64
  • 6.2 Printed Circuit Board Layout

    66
  • 6.3 Component List

    71
• A Reference .csv Files, Interfacing to DSPs, and Package Information

  73
  • A.1 Reference .csv Files

    74
    • A Related Signal Flow Diagrams

      75
  • A.2 Interfacing to DSPs

    98
    • A.2.1 Register Control with DSP Interface

      99
  • A.3 Package Information

    99
• Important Notices

  100