>> You are right, the device will get 5 volts. However it is still part >> of the spec that 2ms without a SOF will force the device into suspend >> mode, so it will use less than 2ma. So depending on your definition of >> function, there will be power, but no activity. If it uses more than >> 2ma, from the bus, problems will ensue. > > What you're saying is true, so long as the spliced USB cable isn't > plugged into a host. But of course, you wouldn't expect to get any > activity on a device when it isn't plugged into a host -- even if you > use a normal cable. > > If the spliced USB cable _is_ plugged into a host then the host will > see it, issue a reset, and start sending SOF packets. In that > situation your comment doesn't apply. I should have been more specific then. I think I understand, but to be sure, if I splice a USB cable, power VBUS with an external 5V power supply, and connect a host and device, the device will work as if the cable was connected to the host normally? - Grant -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
