We ran into interesting behavior with our 1011 this morning.
The 1011 is plugged into a USB hub (A). When another hub (B) is plugged into hub A, the 1011 resets. We've tried several iterations of this, with up to three hubs, but every time a new hub is plugged in, no matter where in the chain it is, the 1011 resets (no matter where it is), losing the output state.
Plugging a USB device into the hub with the 1011 does not cause a reset.
With the 1011 plugged directly into the computer (Mac Mini), we can plug in hubs without encountering a reset.
Is this a USB "feature"? Would powered USB hubs not cause this behavior?
We're using the 1011 and a 3052 to control the 5V line on one of the hub ports, a poor man's way of plugging/unplugging the downstream hub. Don't worry, we've encountered the resets even when we're not interfering with the USB devices.
Thanks for your advice,