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BQ79616: Use the GPIO to switch the multiplexer channels.

Tom Tsao
Expert 1890 points
Part Number: BQ79616

Tool/software:

Hi E2E,

My customer want to use the GPIO of BQ79616 to switch the multiplexer channels.

I have some questions I would like to clarify.

1.GPIO Config is an NVM register. Does this mean I can only configure it once using OTP?

2.If the NVM register can be read and written to, is there a risk of damage from high-frequency read/write operations?

3.Do you recommend using GPIO for controlling multiplexer applications?

Thanks!

  • 0
    TI__Mastermind 42060 points

    Hello Tom,

    Tom Tsao said:
    1.GPIO Config is an NVM register. Does this mean I can only configure it once using OTP?

    You can configure GPIO's without OTP'ing the device. However, if the part were to RESET, it will revert to Hi-Z functionality (Unless OTP'd). See Section 8.3.5 GPIO Configuration of the datasheet.

    Tom Tsao said:
    2.If the NVM register can be read and written to, is there a risk of damage from high-frequency read/write operations?

    As long as the timing is within datasheet specifications, it should be okay!

    Tom Tsao said:
    3.Do you recommend using GPIO for controlling multiplexer applications?

    Yes, that should be perfectly okay to do Slight smile.

    Best Regards,

    Luis Hernandez Salomon