USB 2.0/3.0

• USB-IF. On-The-Go and Embedded Host Supplement to USB Revision 2.0 Specification. July 27,2012. Revision 2.0 version 1.1a
• USB-IF. On-The-Go and Embedded Host Supplement to the USB Revision 3.0 Specification. May 10,2012. Revision 1.1
• Universal Serial Bus 3.0 Specification, Revision 1.0
• PHY Interface For the PCI Express and USB 3.0 Architectures. 2009
• Philips. UTMI+ Specification, Revision 1.0. 2004