• State Resolved
  • Locked Locked
  • Replies 3 replies
  • Subscribers 31 subscribers
  • Views 301 views
  • Users 0 members are here
Support feedback
Options
Options
Related

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: A few question about I2S CLK

Yue TANG
Expert 8705 points
Part Number: TAS5805M


Hi,

            The customer had a few quesitons about the I2S CLK of TAS5805M.  

1. After initialization of TAS5805M,  if still need to keep I2S clk. is It OK to stop I2S CLK and recover  when need. 

       -   Per tested on EVM,stop I2S clk for a while, then recover, a noise can be heard, wonder why?

 2. After initialization , in order to send I2C command, whether need to keep I2S having data. 

3. to transfer from deep sleep to play mode, if need to send I2S?

  • +1
    TI__Prodigy 385 points

    Hi,

    1. After initialization of TAS5805M,  if still need to keep I2S clk. is It OK to stop I2S CLK and recover  when need.

    -->When Clock halt, the device puts all channels into the Hi-Z state and reports Clock Error in Register 113 (Register Address 0x71). After audio clocks recovery, the device automatically returns to the previous state.

           -   Per tested on EVM,stop I2S clk for a while, then recover, a noise can be heard, wonder why?

    --> Pls provide the detail how to reproduce this issue.

     2. After initialization , in order to send I2C command, whether need to keep I2S having data. 

    --> If initialization is successful， you can send I2C command to configure general register without I2S data. But if you want to configure DSP, the I2S is necessary.

    3. to transfer from deep sleep to play mode, if need to send I2S?

    -->Yes, I2S is necessary if you want to play. No I2S, device will automatically go to Hiz. You can refer to 7.5.3.1 in datasheet.

  • 0 in reply to Yang Wang
    TI__Expert 8705 points

    Yang,

                Thanks for the reply. below is the step to reproduce this issue. 

    Step 1 - initial the 5805 EVB

    Step 2 - playing the music

    Step 3 - stop the I2S, include BCK, LRCK, DATA

    Step 4 - wait for a second

    Step 5 - recover the I2S, include BCK, LRCK, DATA.
    Then it’s will get an instant noise at the beginning of data playing, just a few millisecond every time.

     customer just wonder is it a normal behavior that causes the instant noise at the beginning of i2s recover?

  • 0 in reply to Yue TANG
    TI__Prodigy 385 points

    Hi Yue,

    We can't reproduce this issue on AP.

    So could you kindly check your i2s signal, make sure i2s signal won't appear noise when turn back to paly.