TS3A227E: Can I use this device without the i2c operation or pins?

Part Number: TS3A227E

Hi,

Customers are considering TS3A227E.
Customers will not use I2C.
(Customers can not use TS3A2226 because they can not use the DSBG package.)

Can I use this device standalone without using I2C?
If available,Could you tell me how to handle pin terminals.
(Customer needs only the function of detecting 3 pin plug and 4 pin plug.)

Best Regards,
Yusuke/Japan Disty
  • Hello Yusuke,

    Yes this device does offer standalone use without i2c.

    In the datasheet there is a section where it tell you what to do with those pins if you do not use them, please see the snippet bellow:

    If you go further down the datasheets, there will be some more descriptions as to what to do when not using i2c. 

    Thank you,

    Louie

  • In reply to Louie:

    Louie-san,

    Thank you for your kind support.
    Let me ask you one more thing.

    I got a question from the customer about how to pin assign when not using I2C (stand-alone).
    Could you give me your advice?

    1.Could you tell me how to handle the DET_TRIGGER pin in stand-alone.
       Is it OK with OPEN processing?
      
    2.Could you tell me how to handle the MIC_PRESENT pin in stand-alone.
       Is it OK with OPEN processing?

    3.The default setting is SW selection automatic selection.
       When using the default setting, Is it correct by understanding that SW control is unnecessary?

    Best Regards,
    Yusuke/Japan Disty

  • In reply to Tsukui Yusuke:

    Yusuke-san,

    1.Could you tell me how to handle the DET_TRIGGER pin in stand-alone.
       Is it OK with OPEN processing?

    The DET_TRIGGER pin needs to see a high to low transition on the pin to initiate the detection algorithm that determines what type of headset is plugged into the system.

    This high to low transition can be accomplished using a GPIO from a process or you can use the physical mechanical switch in the audio jack connector with the internal pull up in the TS3A227E DET_TRIGGER pin to create this transition on the pin when a head set is inserted into the jack.


    2.Could you tell me how to handle the MIC_PRESENT pin in stand-alone.
       Is it OK with OPEN processing?

    The MIC_PRESENT pin is used to tell the system that there is a microphone plugged in.  This is an open drain output and can be pulled up to VDD when it is unused.



    3.The default setting is SW selection automatic selection.
       When using the default setting, Is it correct by understanding that SW control is unnecessary?

    The switch registers default to the reset values.  You can see that manual control of the internal switch matrix is disabled by default.

     


     

    Thank you,

    Adam