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Original question:

TAS2563: The setting to reduce the idle noise of Handset-call_mode

TAS2563: TAS2563 Idle channel detection register

JY SEE
Prodigy 60 points
Part Number: TAS2563


Tool/software:

What is the register address and setting to disable this feature?

I cant find it inside datasheet

  • 0
    TI__Guru** 110745 points

    Hi Joo,

    This is controlled by Book 0 Page 0 Register 0x3e Bit 4:

    • 0x10 means Idle Channel Detect Enabled
    • 0x00 means Idle Channel Detect Disabled

    Best regards,
    -Ivan Salazar
    Applications Engineer

  • 0
    Prodigy 60 points

    By default, this feature is enable? What is the default register setting value for 0x3E?

  • 0 in reply to JY SEE
    TI__Expert 6860 points

    Hi Ivan;

    JY is also asking:

    What is the default register setting value and can I have details of each bit for 0x3E?  Any other register else will control the idle channel detect?

  • 0 in reply to David Mckinney
    TI__Guru** 110745 points

    Hi Joo, David,

    Yes, Idle Channel Detect feature is enabled by default.
    Default value of register 0x03e is 0x10. Only this register should control the feature.

    Best regards,
    -Ivan Salazar
    Applications Engineer

  • 0 in reply to Ivan Salazar
    Prodigy 60 points

    Hi Ivan,

    I tried to use purepath try to change the Idle Channel Detection threshold.

    But after change, i didnt see any change in the register setting map. 

    What is the register address to change the threshold?

    Beside that, what is the default threshold for Idle Channel Detection?

  • +1 in reply to JY SEE
    TI__Guru** 110745 points

    Hi Joo,

    Did you use the "apply" button at the top-right after changing the threshold?

    • Enable/Disable feature is as mentioned above Book 0 Page 0 Register 0x3e Bit 4:
      • 0x10 means Idle Channel Detect Enabled
      • 0x00 means Idle Channel Detect Disabled
    • Threshold is controlled by 4-byte coefficient in Book 0 Page 2 Registers 0x5c through 0x5f
      • round(10^(idle channel threshold dB/20)*2^31)
    • Hysteresis timer is controller by 4-byte coefficient in Book 0 Page 2 Register 0x64 through 0x67
      • round(time in seconds*fs)

    It is still recommended to use PPC3 to generate the proper coefficient values, as it will account for any value range limitations.

    Best regards,
    -Ivan Salazar
    Applications Engineer