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Intermittent USB Recognition Issue

Question asked by Gary Thompson on Mar 7, 2013
Latest reply on Mar 12, 2013 by Gary Thompson

I am using the freescale USB CDC stack and virtual com port driver for the MCF51JE256 as a device only and have a intermittent issue where windows will not recognize the device. The hardware is to the USB app note (33ohm series resistors and 1.5k pull-up on D+) and the device will recognize roughly 50% of the time. It seems to also be PC dependent which is why I am looking at the hardware...any ideas?

 

Thanks,

 

Gary

EE

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