4 Replies Latest reply on Aug 30, 2017 3:05 AM by rjks

    PSOC4-S CSX (mutual CAP) question

    QiuliangFu

      PSOC4 S series and PSOC6 have CapSense module, which has both CSD and CSX.

         

      I am interested in the CSX now, I want to make it woks with CSD together.

         

      I read the document of PSOC4 S and PSOC6 (#002-10129 and #002-18176). From the description of CSX, I have the following understanding:

         

      (On the figure 32-11 in the page 404 of the DOC #002-18176, )

         

      1. One cross point (TX/RX) need support from both pins of Cmod-GPIO and Csh_tank-GPIO, the working way is very closed to CSD mode. Of course Cmod-GPIO and Csh_tank-GPIO could be re-used for different point;

         

      2. Meanwhile, the Mutual CAP sensor scan needs support from IDAC-A (LEG1) and IDAC-A (LEG2);

         

      The following will be my question about it

         

      If my mutual CAP sensor panel is N*M (like N of TX, M of RX), based on the above method, the whole mutual cap sensor panel scanning need to be repeated for N*M times. is it true?

         

      Thanks,

         

      Qiuliang