• State Resolved
  • Locked Locked
  • Replies 1 reply
  • Subscribers 33 subscribers
  • Views 368 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

TCA6408 About the pin of ADDR

Toshiyuki
Mastermind 7075 points

Hi,

Our customer has a question about the setup of ADDR pin.

They want to change the voltage of the ADDR pin from high to low or low to high

while keeping Vccp at its operating level, and without using RESET pin.

Is it available if they would set up before start condition?

If it is available, how long should they wait from the change of ADDR voltage to start condition?

Best Regards,

Kato / Japan disty

  • 0
    TI__Mastermind 30280 points

    Kato-san,

    Yes, the ADDR pin can be toggled from low to high or high to low during operation using a GPIO from a u-controller.

    ADDR may change state while keeping VCCP high and the slave address will change.

    ADDR may change states and it will take effect if RESET stays high, also.

    The ADDR state is controlled by a couple gates only and is not latched during POR.

    The start bit (or start condition of I2C) does not need a long delay after the ADDR state changes. It will be on the order of nano-seconds for the slave address change to take effect.

    Does this answer your question? If so, please click "Verify Answer". If not, please follow-up with additional information.

    Regards,

    Brian