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TS3A227E: Question of TS3A227E EVM

Wayne Chen (Audio AE)
Genius 15950 points
Part Number: TS3A227E

Hi Sirs,

Can we operate the TS3A227E EVM without Launchpad installed? We failed to enable TS3A227E EVM's Mic function with the following process:

1. Applied 3.3V to J1
2. Connected 4-pole cable (male-to-male) from J10 to laptop PC's 4-pole jack 
3. Configured EVM's jumper setting as picture below
4. Inserted iPhone's headset to J4
  


Would you pls advise that if there is missing or mistake with our test procedure?

Thank you and Best regards,

Wayne Chen
09/05/2018

  • 0
    TI__Mastermind 45575 points

    Wayne,

    The TS3A227E EVM doesn't need a Launchpad to operate.  The Launchpad is for a convenient way to read and write I2C commands to the TS3A227E. 

    Do you have Jumper J2 installed?  In the schematic it looks like the J2 jumper needs to be installed to connect Vcc to VDD and power the TS3A227E.  I don't think the power directions in the text are very clear. 

      

     

    Do you know the impedance of the microphone in the iPhone headset.  Please see this post below for more information.

    Thank you,

    Adam

  • 0 in reply to Adam Torma
    TI__Genius 15950 points

    Hello Adam,

    Thank you for your concern, Our J2 was installed in default. Would you pls check if there is another missing or mistake with our board configurations?

    Thank you and Best regards,

    Wayne Chen
    09/08/2018

  • 0 in reply to Wayne Chen (Audio AE)
    TI__Mastermind 45575 points

    Wayne,

    It is hard to tell but it looks like you don't have the default jumper configurations installed.  Try removing J15 and J20.   

    Did you check the impedance of the headset you are attempting to support based on the e2e post in the thread above?  It is possible the impedance of the headset you are attempting to support is too high for the TS3A227E to detect as a mic.

    Are you able to read the I2C registers to see what state the TS3A227E switch matrix is in?  Is it detecting a 3 pole or 4 pole headset?   

    What is the status of the /MIC_Present output pin?   Is it detecting that there is a microphone?  Or is the mic signal not passing through the switch?

    Thank you,

    Adam

  • 0 in reply to Adam Torma
    TI__Genius 15950 points

    Thank you Adam, we will check it up and get you back soon. Thanks a lot...Wayne Chen