1 Reply Latest reply on Jun 14, 2016 1:30 AM by Madhu Lakshmipathy

    Unable to enumurate USB brigde controller(CY7C65215)

    liaojingjing_1659156

      hi all

         

      i am using cy7c65215 in design

         

      but cannot find any new hardware in windows7

         

      Attachments is my sch

         

      i found some info in FAQ page:

         

      Q5. Can the WAKEUP pin on USB-Serial device be left floating?
      Ans: No, the WAKEUP pin cannot be left floating since it is an input pin. The default polarity of WAKEUP pin is Active Low. So this pin should be pulled high to VDDD (or VCCIO) domain.

         

       

         

      Does wakeup pin cause the problem?

         

      P.S. the VCCD already output 1.8v

         

      Thanks