• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 63 subscribers
  • Views 158 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.

TPS3421: TPS4321EG chip related issues

jeno.zhang
Expert 2875 points
Part Number: TPS3421

Hello，

TPS4321EG chip, when PB1 and PB2 pins are simultaneously pulled down, will the Reset pin be pulled down for 400ms? If after 400ms, when Reset is pulled up, PB1 and PB2 are still low, will the Reset pin be immediately pulled down again or will it not be pulled down again?

Does the customer see the following content in the Datasheet mean that even if PB1 and PB2 remain low, the output will still be pulled up, unless PB1 or PB2 is pulled up and then pulled down? Please help confirm. Thank you!

  • 0
    TI__Mastermind 24115 points

    Hi Jeno, 

    According to this timing diagram, at least one pin must go high and driven low outside of the Trst time for the device to reassert reset and pull down the Reset pin for 400 ms. Therefore after 400 ms if PB1 and PB2 remain low, the reset pin will not be pulled down again until one of the PB1 or PB2 pins is pulled high then low outside of Trst.

    Hope this helps,

    Joshua Austria