Critical issue with non-conforming USB powered hubs.

[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...

[vidarh]

[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)

[zmc]

Is this protection fix is already in the boards that just shipped or is it slated for the next release?

[ajtravis]