• State Resolved
  • Locked Locked
  • Replies 1 reply
  • Subscribers 46 subscribers
  • Views 88 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

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.

ADC128S102-SEP: Questions about SPI

Kazuhiko Hirano
Genius 13568 points
Part Number: ADC128S102-SEP

Tool/software:

Hello,

My customer has questions about SPI as follows.

Q1:
After how much time from power up is SPI interface ready to access?

Q2:
Should SCLK, CS and DIN pins be pulled up to VD with resisters?

Best regards,

K.Hirano

  • 0
    TI__Expert 6940 points

    Hi Hirano-san,

    1. The SPI interface is ready to access once V_D is fully ramped up. A prerequisite to this is the power-supply sequence as described in section 9.1 of the datasheet.

    2. The SPI pins do not need to be pulled up to VD with resistors. They are driven push-pull by the microcontroller. It might be preferred to add a pull-up resistor to ~CS so that the device is in a known state if the controller is reset, but this is not a requirement.

    Regards,
    Joel