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muralij21
muralij21
Associate II
October 6, 2010
Question

USB is not getting detected

  • October 6, 2010
  • 7 replies
  • 1485 views
Posted on October 06, 2010 at 09:22

USB is not getting detected

    This topic has been closed for replies.

    7 replies

    hli
    hli
    Associate
    May 17, 2011
    Posted on May 17, 2011 at 14:10

    Hello,

    If you mean no detection at all, try the resistor but once it is detected but not recognized, please have a look on the USB PLL clock.

    Regards

    xacc
    xacc
    Associate II
    May 17, 2011
    Posted on May 17, 2011 at 14:10

    Make sure you have the pullup on the data pins turned on (depending on USB speed, this will be on different lines).

    muralij21
    muralij21Author
    Associate II
    May 17, 2011
    Posted on May 17, 2011 at 14:10

    I connected the pull up resistor of 1.5k from D+ to VSSA. I got a warning msg ''One of the USB devices attached to this computer has malfunctioned and windows does not recognise it''

    greg_t
    greg_t
    Associate III
    May 17, 2011
    Posted on May 17, 2011 at 14:10

    you need pull up on your D+ line

    muralij21
    muralij21Author
    Associate II
    May 17, 2011
    Posted on May 17, 2011 at 14:10

    xacc
    xacc
    Associate II
    May 17, 2011
    Posted on May 17, 2011 at 14:10

    VSSA is Analog Ground. It need 3.3V for a pullup.

    You should connect it to a GPIO pin that you can toggle.

    muralij21
    muralij21Author
    Associate II
    May 17, 2011
    Posted on May 17, 2011 at 14:10

    I tried it but still i am getting the same error. Any other suggestions..? please
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