12 Replies Latest reply on Sep 8, 2015 6:44 AM by user_285675076

    microSD & PSoC 3 3.3V not working

    user_285675076

      Hello,

         

        I have a problem with writing on a microSD connected directly to a PSoC 3 (CY8C3246PVI-147). It is set to work at 4MHz, and everything is OK when the PSoC is powered at 5V. However, when I power the PSoC at 3.3V, the microSD operations take a lot more time (tens of sceconds), and nothing is written on the memory card.

         

        Is there a problem with the PSoC outputs, not being able to command the microSD at 3.3 V power supply? If so, is a buffer chip required between the PSoC and the microSD?

         

        Thank you!

         

      George