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AM35xx ddr_padref pin with LPDDR

Ayumi Namiki
Intellectual 2690 points

Hi,

How to treat the ddr_padref pin of AM35xx with LPDDR? There is no information in the datasheet, TRM and wiki page. NC is OK or need to pull-down with 50ohm / 1% precision resistors as using DDR2?

Regards,

Ayumi

 

  • 0
    TI__Guru 61455 points

    The AM35xx data sheet (TI document SPRS550) tells you to connect this pin to ground through a 50 ohm, 2% resistor.

    Please refer to the External Memory Inerfaces - SDRC Signals Description Table in the AM35xx data sheet .

     

    Regards,

    Paul

  • 0 in reply to peaves
    TI__Intellectual 2690 points

    Hi Paul,

     

    Thank you for your comment. I figure out that no gap of this pin treatment between w/DDR2 and w/LPDDR.

     

    Regards,

    Ayumi