3 Replies Latest reply on Jul 31, 2020 4:16 AM by RashiV_61

    FX3 SPI power voltage?

    KACH_4155631

      The SPI power domain is VIO4 and the default value is 3.3.

      Could anyone tell me how to change the power from 3.3 v to 2.5V?

      Is there a API can do it?

        • 1. Re: FX3 SPI power voltage?
          RashiV_61

          Hello,

           

          The SPI power domain cannot be changed using API.

          Hardware changes need to be done to change  VIO4  to  2.5 V from 3.3 V.

          - VIO4 power domain need to be changed

           

          Please let me if you are using the FX3 explorer kit? (CYUSB3KIT-003). If yes, then VIO4 is supplied with 3.3V and it cannot be changed to 2.5 V using J2 jumper or by calling API

           

          Please let me know if any queries on this

           

          Regards,

          Rashi

          • 2. Re: FX3 SPI power voltage?
            KACH_4155631

            Yes i use CYUSB3KIT-003 board.

            Is it possible I rework the board to let the VIO4 change to 2.5 level?

            If possible ,could you give me the rework direcion?

             

            Thanks for your help.

            • 3. Re: FX3 SPI power voltage?
              RashiV_61

              Hello,

               

              FX3 Explorer kit board doesn't have 2.5 V LDO and the B11 (VIO4) pin is not brought out on the board.

              The 3.3 V LDO cannot be replaced with 2.5 V as other power domains (VIO5 and CVDDQ) are supplied with 3.3 V.

               

              You need to design a custom board for the changes (VIO4 : 3.3V to 2.5 V)  needed.

               

              Regards,

              Rashi