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

2.1.3 VAD Monitoring Channel

This parameter decides which channel is to be monitored for VAD activity. Only one of the channels can be monitored for VAD activity at a time.

As Table 2-5 shows, VAD channel selection is done using the LPAD_CH_SEL[1:0] bit of LPAD_CFG1[5:4] register (page = 0x01, address = 0x1E).

Table 2-5 VAD Channel Selection Using LPAD_CFG1 Register
Bit Field Type Reset Description
5-4 LPAD_CH_SEL[1:0] R/W 10b VAD channel select.
0d = Channel 1 is monitored for VAD activity
1d = Channel 2 is monitored for VAD activity
2d = Channel 3 is monitored for VAD activity
3d = Channel 4 is monitored for VAD activity