• State Resolved
  • Locked Locked
  • Replies 1 reply
  • Subscribers 34 subscribers
  • Views 249 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.

DP83822IF: XI input range in case of crystal

Hirotaka Matsumoto
Guru 27595 points

Part Number: DP83822IF

Hi all


Would you mind if we ask DP83822IF?

We would like to confirm the input voltage amplitude range at XI pin.

In case of Oscillator, there is the descpription on the datasheet.
If an external clock source is used, XI should be tied to the clock source and XO should be left floating.
The amplitude of the oscillator should be a nominal voltage of VDDIO.
So, in case of VDDIO=1.8V, the amplitude of the oscillator should be within 1.8V.

In case of Crystal, is it the same?


Kind regards,

Hirotaka Matsumoto

  • 0
    TI__Expert 7040 points

    Hi Matsumoto-san,

    It is true that the amplitude of the oscillator should be within the VDDIO voltage provided by the PHY.

    The amplitude of the oscillator is determined by the oscillator selected. This is generally not a parameter specified by the crystal or the PHY. If the drive level and load capacitance are within the specification of the crystal the part will function properly. 

    Regards,
    Justin