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Questions with TMS320C6713B datasheet

Keven74263
Prodigy 250 points
Other Parts Discussed in Thread: TMS320C6713B

Hi, all

      I am doing my project with tms320c6713b, when reading the datasheet---sprs294b, I can not understand the sentence below

       "IPD = Internal pulldown, IPU = Internal pullup. [To oppose the supply rail on these IPD/IPU signal pins, use external pullup or pulldown resistors no greater than 4.4 k and 2.0 k, respectively.]"

       What does "oppose " mean here?

        Does it mean this-----If the pin has an IPU, and when I interface the pin with an external pull down resistor, it can be pulled down?

        Or "oppose"  has other meanings here ?

  • 0
    TI__Guru* 84110 points

    Keven,

    Keven said:
    Does it mean this-----If the pin has an IPU, and when I interface the pin with an external pull down resistor, it can be pulled down?

    Yes. Your understanding is correct. If there is an IPD and you want the default state to be logic 1, use a 4.4k Ohm pullup resistor; if there is an IPU and you want the default state to be logic 0, use a 2.0k Ohm pulldown resistor.

    Regards,
    RandyP

     

    If you need more help, please reply back. If this answers the question, please click  Verify Answer  , below.

  • 0 in reply to RandyP
    Prodigy 250 points

    Thank you very much!