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Original question:

TLV320ADC5120: How to configure the VAD function of TLV320ADC5120?

TLV320ADC5120: How to configure the VAD function of TLV320ADC5120 without any external CLK?

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Prodigy 50 points
Part Number: TLV320ADC5120

Tool/software:

Hi TI Team,

We want to use the VAD functionality of ADC5120 without any external CLK.

Is the ADC5120 supported?  If yes, how to configure the register to select the internal clock.

I tried these steps and fixed some values of this guide. But still no interrupt occur. I wonder if there is any other registers I need to set to make this feature work. And I measured the voltage of AREG, which is 1,8V already.

  • 0
    TI__Mastermind 25360 points

    Hi,

    This script attached uses the onboard mic with internal oscillator clock. Please cross-check with your script during testing.

    # Power up IOVDD and AVDD power supplies
# Wait for 1ms.
#
w 9C 00 00 # Goto Page 0
w 9c 01 01 # reset device
w 9c 00 00 # go to page 0
w 9C 02 81 # Wake-up device and enable AREG
#ASI Configuration
w 9c 07 00
w 9c 0b 00
w 9c 0c 01
w 9c 0d 02
w 9c 0e 03
d 10 # Wait for 16 ms
w 9c 00 07 # go to page 7
w 9c 7c 00 5d c0 00 # 3s learning period
w 9c 00 09 # go to page 9
w 9c 50 00 72 59 dc # -7dB threshold
w 9C 00 00 # Goto Page 0
w 9c 3c 00 # channel 1 set to Analog input
w 9c 41 40 # channel 2 set to PDM input
w 9c 73 a0 # I/P channel 1 enabled
w 9c 74 a0 # ASI out ch 1 & 3 enabled
w 9c 21 22 # GPIO1 as IRQ (latched only) driving high and low
w 9c 22 01 # GPO disabled
w 9c 2b 00 # GPI disabled
w 9c 3b 00 # GPI2 disabled
w 9c 33 e7 # unmask VAD interrupt, 
w 9c 32 60 # 2ms one time pulse
w 9c 6b 03 # cutoff frequency 0.008fs
w 9c 00 01 # go to page 1
w 9c 1e 40 # Channel 1 as VAD input, auto mode , internal clk
w 9c 1f 08 # VAD enabled in recording mode
w 9c 00 00 # go to page 0
w 9c 75 e1 # Enable VAD, power up adc and pdm channels, micbias

  • 0 in reply to Daveon Douglas
    Prodigy 50 points

    Hi Daveon,

    Thanks for your help, we will try it and give you feedback.