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TPS65983: Changing MRESET polarity to active low

Meredith Turner
Prodigy 360 points

Part Number: TPS65983

Question regarding the TPS65983 MRESET polarity:

The data sheet states that the polarity of the MRESET signal (Pin E11) defaults to active high but can be changed to active low based on a configuration option, how is this accomplished?

Datasheet page 6, in the pin functions table, it states the following for MRESET (GPIO11):

"General Purpose Digital I/O 11. Forces RESETZ to assert. By default, this pin asserts RESETZ when pulled high. The pin can be programmed to assert RESETZ when pulled low. Ground pin with a 1-MΩ resistor when unused in the application"

Thank you!

  • 0
    TI__Mastermind 36756 points

    Hi Meredith,

    The TPS65983 is only to be used for TBT device designs that are following an Intel Reference design. The configuration tool for the TPS65983 only supports these Intel Reference Designs and does not support custom behaviors.

    If this answers your question, PLEASE select This resolved my issue

    Thank you,

    Eric

  • 0 in reply to Eric Beljaars
    TI__Prodigy 360 points
    Hi Eric,

    Just to clarify, you're saying the datasheet is not correct and the MRESET/GPIO11 pin can actually NOT be programmed to assert RESETZ when pulled low (as is stated in the datasheet)? FYI, My customer is using this part for a TBT design and is following an Intel Reference Design.

    Thanks,
    Meredith
  • 0 in reply to Meredith Turner
    TI__Mastermind 36756 points
    Hi Meredith,

    No, the datasheet is correct. However, the TPS65983 is only supported for use with TBT Reference Designs from Intel. None of these designs require swapping MRESET polarity so this behavior is not supported in the TPS65983 configuration tool.

    Thank you,
    Eric