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TMS320F28375D: pull up on pin 88

Viktorija Cecil
Mastermind 18501 points
Part Number: TMS320F28375D


Customer has a question about pull-ups on pin 88:

It has been found in the SW after some time interrupts are generated at this pin, we seen the pin on DSO the pin was logic 0. In SW the pin was configured push-pull:

 Changes made

  1. In SW enable the weak pull-up on this pin
  2. Externally connected 10k pull-up on this pin

 Both the changes make the problem solve. My question is which one we should use

  1. Externally pull-up then what configuration should be made in SW for that pin?
  2. OR- Is internally pull-up reliable for long term?

What do you recommend?

Thanks

Viktorija

  • 0
    TI__Mastermind 42195 points

    Viktorija,

    1. Configure the GPIO however you want to use it, input, output or a peripheral function are all OK. Since you have an external Pull-up resistor it is not needed to enable the internal pull up.
    2. The internal pull up is reliable and will continue to work for the life of the device. It however, is not a strong pull up, so I typically recommend that customers use an external pull-up resistor.

    Regards,
    Cody