1 Reply Latest reply on Nov 4, 2016 9:22 AM by vsrs

    More than 8 Analog Inputs on PSOC4 (CY8C4245)

    alexander.wiedekind-klein

      Hi all,

         

      similar to the problem mentioned here (http://www.cypress.com/forum/psoc-4-architecture/cy8ckit-043-4m-series-more-8-analog-pins)

         

      is mine...

         

      I need about 13 analog inputs (11 single sides , one differntial), see attached project.

         

      I build an application using the seq SAR_ADC an an AMuxHW. The project compiles without an error. The software is running.

         

      On the terminal I can read the values, but they behave strange and are not meaningful.

         

      All values via the mux are nearly the same and seem to depend on the voltage of P2.6/P2.7 (diff input).

         

      I tried several combinations, like only one input of the SAR-ADC, but it seems to me that the AMuxHW is not working proberbly.

         

      I even added an analog output (TAnalog). By switching the inputs, I expected a change on that signal - nothing..

         

      Anyone, any ideas ;-)

         

      Is there a restriction of the analog system, using the SAR-ADC and more than 8 inputs ???

         

      Greetings (from germany)

         

      Alex