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Re: Critical issue with non-conforming USB powered hubs.
Posted:
Fri Dec 27, 2013 12:17 am
by mhonman
Richard, have a careful read over the original post. The problem is that the Parallella can be damaged by use with a hub that violates the USB specification. If the hub follows the USB spec faithfully, there is no problem. The remedial action that Adapteva are taking is thus a bonus for future purchasers - good engineering in action.
The openness about this issue is in striking contrast to the way the PC industry handled the infamous nVidia laptop GPU problem a few years ago...
Re: Critical issue with non-conforming USB powered hubs.
Posted:
Tue Jan 07, 2014 8:54 am
by vidarh
Re: Critical issue with non-conforming USB powered hubs.
Posted:
Wed Feb 05, 2014 9:09 am
by tnt
Mmm, just seen the proposed fix on the new schematic ... however I'm not exactly sure what's the logic behind it.
Like, overcurrent/thermal will reset the FPGA which will in turn cause the enable to be de-asserted which will shutdown curent flow ? I guess it can work, but it as a pretty serious issue that if you plug something that draws too much current, it will reset your board ... (instead of just shutting down usb power to it)
Re: Critical issue with non-conforming USB powered hubs.
Posted:
Thu Jul 03, 2014 10:17 pm
by zmc
Is this protection fix is already in the boards that just shipped or is it slated for the next release?
Re: Critical issue with non-conforming USB powered hubs.
Posted:
Mon Aug 17, 2015 1:38 pm
by ajtravis