SLAU896A July   2023  – March 2026

 

  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  AC-MB Settings
      1. 2.1.1 Audio Serial Interface Settings
      2. 2.1.2 USB
      3. 2.1.3 External
    2. 2.2  AC-MB Power Supply
    3. 2.3  Default Jumper Setting on TAS2574EVM
    4. 2.4  I2C Target Address Selection
    5. 2.5  IOVDD and AVDD Power Supply Options on EVM
    6. 2.6  VBAT Power Supply for TAS2574 on EVM
      1. 2.6.1 VBAT 2S EVM Hardware Configuration
      2. 2.6.2 VBAT 3S EVM Hardware Configuration
    7. 2.7  1-Channel Configuration
    8. 2.8  4-Channel Configuration
    9. 2.9  Speaker Outputs
    10. 2.10 4-Wire Measurement of Load
  9. 3Software
    1. 3.1 PurePath Console 3 Quick Start Up
    2. 3.2 PPC3 - 257x EVM Feature Description
      1. 3.2.1 Limiter and Brown-Out Protection
      2. 3.2.2 Playback and PCM Configuration
      3. 3.2.3 TDM Receiver and Transmitter PPC3 Configuration
      4. 3.2.4 Miscellaneous and IRQZ Configuration
      5. 3.2.5 Tone Generator and Ultrasonic Chirp Generator
      6. 3.2.6 AVDD Bridge, Music Efficiency and Noise Gate
      7. 3.2.7 Boost and Channel Gain
  10. 4Hardware Design Files
    1. 4.1 Schematics
    2. 4.2 PCB Layouts
    3. 4.3 Bill of Materials (BOM)
  11. 5Additional Information
    1. 5.1 Trademarks
  12. 6Revision History

3.2.5 Tone Generator and Ultrasonic Chirp Generator

TAS2574 features internal tone generator that can be used independently from the digital audio playback. This sine wave generator can be used in the audible frequency band, or for ultrasonic applications as well. However, only one of these cases can be used at a time.

The tone generator is a simple tool that can be used to generate sine waves from 16 Hz up to 20 kHz, which amplitude is configured from -105dB up to 0 dB. There is an optional ramp effect that goes from 0 to 1 second in 10 millisecond steps.

The ultrasonic chirp generator can be used to play a pulsing sweep tone for sine waves with frequencies higher than 20 kHz. The frequency sweep is set by a start frequency and a bandwidth. The frequency change between each sweep step is defined from 100 Hz up to 2 kHz. The amplitude of the chirp can be configured from -80dB and up to -6dB. There is also an optional ramp effect before and after the chirp that goes up to 1 second in 10 millisecond steps. And finally, an Off period between chirps can be configured from 0 to 2 seconds in 10 millisecond steps as well.

TAS2574EVM Tone and Ultrasonic Chirp Generator PPC3 Configuration Figure 3-11 Tone and Ultrasonic Chirp Generator PPC3 Configuration