3 Replies Latest reply on Mar 26, 2014 6:39 AM by user_14586677

    high speed interrupt on SIO pins

    prajakta.zagade

      Hello all,

         

      I am  using CY8c3244PVI-133 controller for one of my project.

         

      I am using P12.3 as port pin interrupt. it is digital input pin with rising and falling edge of pulse interrupt detection.

         

      I am doing testing by giving signal of period 40msec to this pin.

         

      for this I am using other board which will generate the 40msec signal and I have shorted grounds of my testing board i.e 133 controller and signal generator board.

         

      I did testing with minimum voltage of 1.9V as supply voltage to CY8C3244PVI-133 board and supply to other board i.e signal generator board is 3.3V.

         

      after this testing I manually made P12.3 pin high and low by connecting and disconnecting to ground. but it is not able to detect the interrupt. what has gone wrong in this?

         

      Can I give faster signal at low voltage to this pin?

         

      Please guide.

         

      Thank you all