• State Resolved
  • Locked Locked
  • Replies 2 replies
  • Subscribers 32 subscribers
  • Views 143 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.

TLK10031: Additional Information on General Purpose Inputs

Mick Soriano
Intellectual 290 points
Part Number: TLK10031
Other Parts Discussed in Thread: TLK10232

For the "General Purpose Input", the TLK10031 datasheet lists a single pin name, "GPI0", but lists 3 pin numbers (L8, J4, J10).  The Pinout Matrix, on the other hand, lists three unique pin names: GPI0, GPI1, and GPI2.  Questions:

  1. Are the three pins tied internally to the same die signal?  Or are the three pins assigned to their own signals on the die?
  2. The datasheet says that this signal(s) should be grounded through a resistor.  Should each pin be grounded through its own resistor?
  3. The datasheet for the TLK10232 dual KR PHY which, as I understand it, uses the same die as the TLK10031, says that hooks should be put in to tie the GPI pin(s) to VDDO.  Does this apply to the TLK10031 as well?
  • 0
    TI__Mastermind 19165 points

    1. There are three GPI pins, as show in the datasheet pinout These pins are not tied internally.
    2. Each pin should be grounded through its own resistor
    3. Here is the description from TLK10232 datasheet: "This signal is used during the device manufacturing process. It should be grounded through a resistor on the device application board. The application board should also allow the flexibility of easily reworking this signal to a high level if device debug is necessary (by including an uninstalled resistor to VDDO)."
    • My feedback would be that having footprint allowance on your board for VDD0 pullup on GPI pins would be nice from debug perspective but should not be required

     

    Cordially,

    Rodrigo Natal