2 Replies Latest reply on Aug 24, 2020 11:26 PM by mama_1337366

    About FX2 wakeup pin.


      Hi, how to use this pin?

      I do not let the 8051 core into power down mode forever?

      How could I set this pin?

      connect to  vcc or ground,  directly?



        • 1. Re: About FX2 wakeup pin.



          Wakeup pin is used to bring the FX2LP CPU out of suspend through an external interrupt generating by asserting the pin.

          Holding WAKEUP asserted inhibits the EZ-USB chip from suspending. This pin has programmable polarity.


          The WAKEUPCS register can be used to enable/disable individual wakeup (WUEN/ WAKEUPCS.0 for Wakeup pin) and set its polarity ( WUPOL ).


          If you want the EZ-USB to never go to suspend state, you can leave the pin asserted (low/high) depending on the polarity set in the WAKEUPCS register (WAKEUPCS.4/ WUPOL).




          • 2. Re: About FX2 wakeup pin.

            Thanks for the help, I have understood.