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Thank you for interest in the Intel® Joule™ Products.
The USB sub-system supports one DRD (dual-role device)/OTG (on-the-go) port, which uses separate host controller (xHCI) and device controller (xDCI) IPs.
The USB subsystem incorporates the xHCI Host Controller, and USB 3.0 Controller configured as a USB Device only (xDCI).
For more information regarding the USB electrical characteristics, please follow this link http://www.intel.com/content/dam/support/us/en/documents/joule-products/intel-joule-expansion-hardware-guide.pdf, page 54.
Information related to the USB device connectivity (USB2 and USB3) can be found in this link http://www.intel.com/content/dam/support/us/en/documents/joule-products/intel-joule-expansion-board-design-guide.pdf, page 27.
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