SBAA600 October   2024 TAA5212 , TAC5111 , TAC5112 , TAC5211 , TAC5212

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Voice Activity Detection
    1. 2.1 VAD Configurations
      1. 2.1.1 User, Auto, Intermediate
      2. 2.1.2 VAD With ADC Recording
      3. 2.1.3 VAD Monitoring Channel
      4. 2.1.4 VAD Interrupt Pin
      5. 2.1.5 MICBIAS Enable During PDM Monitoring
      6. 2.1.6 VAD Clock Configurabilty
    2. 2.2 VAD Parameters
      1. 2.2.1 Initial Learning Period
      2. 2.2.2 Hold Over Counter
      3. 2.2.3 Wakeup Wait
      4. 2.2.4 Threshold
  6. 3VAD Performance Results
  7. 4Examples
  8. 5Summary
  9. 6References

2.1 VAD Configurations

Table 2-10 shows the different modes in which VAD can be operated.

Table 2-1 List of VAD Configuration
VAD Configuration Function, Description
Modes: User, Auto, Intermediate Auto Mode: VAD interrupt-based ADC power on and power off.
Intermediate Mode: VAD interrupt-based ADC power on and user-initiated ADC power off.
User Mode: VAD monitoring is active. ADC record path power on and power off is user initiated.
VAD monitoring channel Channel assigned for VAD monitoring is configurable
VAD Clock Configurable Different Clock can be selected for VAD processing including external and internal clocks
VAD with ADC recording This feature decides if voice detection needs to be active when recording is in progress.
VAD Interrupt Pin Device can be configured to monitor the VAD interrupt on any general purpose I/O pin or on SDOUT