This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

TAS5805M: DSP_MISC Register Clarification

Part Number: TAS5805M

Could you please clarify the following points regarding the DSP_MISC control register?

  1. What is the function of bit position 3? The description "Left and Right will have use unique coef 0->Right channel will share left channel coefficient" is unclear to me.
  2. Is there reason there are no bits to bypass other DSP modules besides DRC, FIR and EQ (ex: AGL & Clipper)? Are there other ways to bypass these modules?
  3. Is it okay to change these bits during playback, or do we need power state recycling?

Thank you,

Mustafa

  • Hi Mustafa

    What is the function of bit position 3? The description "Left and Right will have use unique coef 0->Right channel will share left channel coefficient" is unclear to me.

    This bit still related with below FIR, DRC, EQ. By default the Right channel will use the same setting with Left channel. Set this bit to 1 could give different setting for Left and Right channel. The detailed setting could be found in PPC3 software.

    Is there reason there are no bits to bypass other DSP modules besides DRC, FIR and EQ (ex: AGL & Clipper)? Are there other ways to bypass these modules?

    By default settings, the other function like AGL and Clipper also not take any effect, won't cause any side effect like more delay. 

    Is it okay to change these bits during playback, or do we need power state recycling?

    Not suggest to change during playback, may hear pop noise when doing these changes.

  • Thank you, Shadow. What do you mean by "By default settings, the other function like AGL and Clipper also not take any effect"? I have AGL and Clipper enabled by default and want to know if there are bits to bypass them like DRC bit. Are you saying if I by pass DRC and EQ, then AGL and Clipper is also bypassed? Could you please clarify? Thanks! 

  • hi Homsi

    AGL and clipper can be on/off by config register.

    have you tried our PPC3 GUI, you can use the i2c log feature to get the code to control them.

    when click 4 on/off, the the script come out at 5 as below.

    tks

    jesse

  • Yes I am familar with process control registers. It was just confusing why EQ, FIR and DRC had their bypass control bits on page 0 and not AGL and clipper. I guess it is just how this IC was designed.

  • Hi Mustafa

    I guess it is just how this IC was designed.

    That's right, it's based on some major customer's feedback at that time.