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analog selection issue in TLV320AIC3262

venkat ediga
Intellectual 490 points
Other Parts Discussed in Thread: TLV320AIC3262

Hi,

I faced some Problems  regarding on the Analog Channel selection to MicPGA and ADC channels in TLV320AIC3262 module.

1.I am using Single ended Input channels to MicPGA.

case 1:

First I configured the IN2L to Left  MicPGA  and IN2R to Right MicPGA settings, according to this both are working condition and the same data routed to DAC channels & ASI1. every thing  is fine.

 Book0/page1/Register51 --IN2L

Book0/page1/Register54 --CM1

Book0/page1/Register55 --IN2R

Book0/page1/Register57--CM1

case 2:

1..First  I  can configured IN2R to Right MicPGA, at that  time data should be goes to DAC channels,but it should not reach to ASI1, after that  i enabled IN2L to Left  MicPGA,than data is observed on ASI1.

Book0/page1/Register55 --IN2R

Book0/page1/Register57--CM1

the Problem is ,when  ever  I configured the IN2R to Left MicPGA or IN2R to Right MicPGA, with this settings data is not available  on the ASI1,but micloop back is working(IN2R to Headset)..

I think,I missed something on register settings,please explain how it works..I need IN2R data is routed to ASI1.

thanks

venkat .E

  • 0
    TI__Guru* 84915 points

    Hi, Venkat,

    Please take a look of the following script. It is an example of how to route IN2R to ASI1 (it was tested on the EVM with a MCLK frequency of 12.288 MHz):

    w 30 00 01    # Page 1
    w 30 01 00    # Disable weak connection of AVDD with DVDD; All the external analog supplies are available
    w 30 00 00    # Page 0
    w 30 12 81    # NADC powered up; NADC = 1
    w 30 13 82    # MADC powered up; MADC = 2
    w 30 00 01    # Page 1
    w 30 37 10    # IN2R to Right Mic PGA (P-Terminal)
    w 30 39 40    # CM1 to Right Mic PGA (M-Terminal)
    w 30 3c 00    # Right MICPGA enabled; Volume = 0dB
    w 30 00 00    # Page 0
    w 30 52 80    # Right ADC channel un-mute
    w 30 51 40    # Right channel ADC power up

    The script is in format w (write) 30 (I2C address 00 (Register) 01 (Data)

    Please let me know if the problem persists.

    Best regards,
    Luis Fernando Rodríguez S.

  • 0 in reply to Luis Fernando Rodriguez S.
    Intellectual 490 points

    Hi Luis,

      I  configured the same snippet for right mic channel,but i do not observed any data on ASI1. along with right mic configuration ,left channel settings enabled after that  it starts working..

  • 0 in reply to venkat ediga
    TI__Guru* 84915 points

    Hi, Venkat,

    This script was tested on the TLV320AIC3262 EVM. So, it should work. Have you checked if all your connections are similar to the TLV320AIC3262EVM? Additionally, have you applied a software and hardware reset before use the script that I provided?.

    Best regards,
    Luis Fernando Rodríguez S.