• State Resolved
  • Locked Locked
  • Replies 1 reply
  • Subscribers 46 subscribers
  • Views 491 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.

TSC2046E: Pull-up resistor configuration for SPI interface

yong lin
Prodigy 210 points
Part Number: TSC2046E


Tool/software:

Dear experts

     We have completed the debugging of the touch screen. And it works.

     As shown in the screenshot, I have removed all the pull-up resistors, and the pin configuration in the software has no pull-up and pull-down resistors. My question is whether the SPI interface has been configured with the corresponding pull-up or pull-down resistors inside the TSC2046E chip? I don't see relevant information in the data sheet.

  • +1
    TI__Genius 13565 points

    Hi,

    I do not think that the TSC2046E has internal pull-down or up resistors for the SPI lines. SPI by definition uses push-pull, so it should not need pull up or down resistors. On the other hand, I2C does require pull up resistors because it uses open drain. I hope this helps and let me know if you need more assistance with your design.

    Best,
    Mir