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TMS320F2800152-Q1: question about GPIO current

Julia Li
Expert 3630 points
Part Number: TMS320F2800152-Q1

Dear Champs,

1. If the GPIO pin is overcurrent, will it cause the DSP to reset?
2. If the GPIO pin output is low level, but an external high level is given, will it cause the device to reset or work abnormally? Does this ultimately depend on the size of the pin sink current?
3. According to the specification, the source/sink current capability of is 4mA. Is this value related to the temperature? What is the relationship between the amount of sinking current that can be tolerated and the time it can withstand it?

Thanks!

Best Regards,

Julia

  • 0
    TI__Mastermind 30180 points

    Hello Julia,

    Julia Li said:
    1. If the GPIO pin is overcurrent, will it cause the DSP to reset?

    Exceeding the Absolute Max Ratings as provided in the datasheet will more than likely damage the device pin, we do not test beyond this.

    Julia Li said:
    2. If the GPIO pin output is low level, but an external high level is given, will it cause the device to reset or work abnormally? Does this ultimately depend on the size of the pin sink current?

    Are you talking about driving a current on the pin when the GPIO is in output mode? I believe doing this when the open-drain mode is not configured will damage the device pin.

    Julia Li said:
    3. According to the specification, the source/sink current capability of is 4mA. Is this value related to the temperature? What is the relationship between the amount of sinking current that can be tolerated and the time it can withstand it?

    This value is obtained at the given operating temperatures of the device, so as long as the temperature is between these maximum/minimum values then the source/sink current should be expected to fall within the provided specifications.