• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 33 subscribers
  • Views 199 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.

TCAN1044V-Q1: RXD relationship with STB

user6544449
Intellectual 795 points

Part Number: TCAN1044V-Q1

Hello Team,

My customer use TCAN1044VDRQ1, we intended the RXD down to low when the STB down to low. But it was remain 3.3V. Why?

Here is our schemetic.

Thanks!

  • 0
    TI__Prodigy 205 points

    Hello,

     

    RXD has an internal pull-up to VIO which is why RXD remains at 3.3 V.

    When STB is low, then the device is in Normal Mode, so RXD will mirror the bus state. When there is no activity on the CAN bus then the CAN bus will be in a recessive state which is a logic high. This may also be why RXD is also high.

    Please let us know if you have any questions or need further explanation.

     

    Respectfully,

    Brandon Young