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TI Home » TI E2E Community » Support Forums » Microcontrollers » MSP430™ Microcontrollers » MSP430 Ultra-Low Power 16-bit Microcontroller Forum » Why start not get the Schmitt Trigger disabled in P1.0?
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    Why start not get the Schmitt Trigger disabled in P1.0?

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    LaunchRed
    Posted by LaunchRed
    on Sep 19 2012 22:31 PM
    Prodigy240 points

    According to the schematic ...

    ... just that INCHx is 0 to disable the Schmitt Trigger in red. The INCHx starts with 0 then it would not be right to expect that in just starting the P1.0 could not function as input?

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    • Jens-Michael Gross
      Posted by Jens-Michael Gross
      on Sep 20 2012 12:08 PM
      Verified Answer
      Verified by LaunchRed
      Guru140435 points

      The term isn't 'INCHx' but 'INCHx=y'. So when INCHx is 0 for A0, 1 for A1, 2 for A2... And this term is only true durign the sampling period of an ongoing conversation.
      You suld take a look at the schematics of teh ADC10 to see where INCHx comes from.
      I agree that this term is a bit misleading as it doesn't describe a static signal but rather the result of an expression like 'if (SAMPLING==true and CHANNEL==y)'

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