• State Resolved
  • Replies 3 replies
  • Answers 1 answer
  • Subscribers 30 subscribers
  • Views 29 views
  • Users 0 members are here
Support feedback
Options
Options
Related

TLV320AIC3106: PGA_R Volume Control vs DAC_R 1 Volume Control

Giri Rama
Prodigy 10 points
Part Number: TLV320AIC3106

Tool/software:

Hello

New to the chip, and having to fix audio routing issues behind on schedule.

Is it that Register 91 routes PGA_R directly to Right_LOP and Register 92 Routes PGA_R into DAC_R then routes to Right_LOP?

Bit confused on how these registers affect the routing - trying to get Line1R to Right LOP (single ended).

Thank you.

Giri

  • 0
    TI__Mastermind 46645 points

    Hi Giri,

    You are correct that Register 91 routes the PGA_R output directly to Right LOP/M.

    Register 92 does not involve PGA_R. DAC_R is the output signal from the DAC after receiving the digital input I2S signal. Register 92 connects this DAC output to Right LOP/M.

    The functional block diagram shows how PGA_R and DAC_R are different signals that go into the mixing block. Details on the mixer are found in section 10.3.5 of the datasheet.

    Best regards,
    Jeff McPherson

  • 0 in reply to Jeff McPherson
    Prodigy 10 points

    Thank you for that description.

    The diagram showed this, but I did not know how to interpret the info.

    Thanks again.

    Giri

  • 0 in reply to Giri Rama
    Prodigy 10 points

    If I could ask a follow on qustion.

    I am trying to route Line1LP via the Right PGA to Right_LOP.

    I have set Registers 16, 24, 91 and 93. But do not get the route to complete.

    If I do Audio Bypass - the audio shows up on Right_LOP (so I think I have confirmed the board).

    Is there a register(s) I am missing or am I mis-understanding the routing?

    Thanks 

    Giri