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TMS470R1B1M, Questions about GIO and ADC

Madje
Prodigy 10 points

Other Parts Discussed in Thread: TMS470R1B1M

Hi everybody.

My english is not very good.

I'm working with pressure sensors, and i'm using a TMS470R1B1M board. First, i would like to do an analog-digital conversion of my sensors responses, and then control the analog input of the ADC with the program, and modifies the output of the ADC, as a function of the analog input.

I read the datasheet aboud GIO and ADC but i still don't understand all i want. For example, can i define a GIO pin as an output of the ADC pin? Really need help on that :s.

                                    Yours, sincerely.

  • 0
    TI__Mastermind 22375 points

    Madje,

    Please be aware that the TMS470R1 Series (including the TMS470R1B1M device) is not recommended for new designs. However, the device, tool, or software continues to be in production to support existing customers.  Please see the full 'NRDN' notice here.

    Soon TI will be launching the new TMS470M series of microcontrollers.  This series will feature greater ARM CPU performance and a similar peripherial set to the TMS470R1 Series of microcontrollers.  Please come back soon for more information about the TMS470M Series of microcontrollers.  The product preview for the first two microcontrollers in the TMS470M series is available here: TMS470MF0660x - SPNS157. 

    Now to answer your question: The ADC input pins, when not used as analog input can be used as digital input only.
    You cannot drive the pin as an output, but you can read the state (0 or 1)
    The structure of all ADC input pins does not have an output buffer.

    The ADC Event pin is a full digital pin and can be used as a general purpose input or output.

     

    In French,

    Toutes les entrees analogiques peuvent etre utiliser comme des entrees digitales lorsqu'elles ne sont pas utiliser en mode analogique (en vue de conversion)
    Elles ne peuvent pas etre utilisees comme des sorties.
    La structure des pins ADC input ne possede pas de buffer de sortie.

    La pin ADC EVT (event) est un signal purement digital et peut etre utilise comme une entree ou comme une sortie.

    Sincerely,

    Jean-Marc