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USB is not getting detected

muralij21
Associate II

‎2010-10-06 12:22 AM

Posted on October 06, 2010 at 09:22

USB is not getting detected

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7 REPLIES 7
xacc
Associate II

‎2011-05-17 05:10 AM

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).

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hli
Associate II

‎2011-05-17 05:10 AM

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

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muralij21
Associate II

‎2011-05-17 05:10 AM

Posted on May 17, 2011 at 14:10

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greg_t
Associate II

‎2011-05-17 05:10 AM

Posted on May 17, 2011 at 14:10

you need pull up on your D+ line

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muralij21
Associate II

‎2011-05-17 05:10 AM

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''

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muralij21
Associate II

‎2011-05-17 05:10 AM

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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xacc
Associate II

‎2011-05-17 05:10 AM

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.

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