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[TPS65930] Unused KBC pin

Antony Lin
Genius 13480 points

Can we use unused keypad column pin as "open drain" "general purpose output"?  How to control the output level of it? 

Thanks,

Antony

  • 0
    TI__Genius 15100 points

    Hi Antony,

    Though th ecolumn is open drain there is no software control for these pins. The only way you can have any software control i sto check the row and column short (for key press detection). This obviously cannot be used for any GPIO like activity.

    The KBC_REG bits can help you drive column lines but there is no detection for columns alone. You can use software scanning and try to detect the column pressed by reading the rows and columns. This is theoretically possible, however I have never seen anyone use this.

     

    Regards,

    Gandhar.