Specifications
USB OTG is part of a supplement to the Universal Serial Bus (USB) 2.0 specification originally agreed upon in late 2001 and later revised. The latest version of this supplement also defines behavior for an Embedded Host which has targeted abilities and the same USB Standard-A port used by PCs.
SuperSpeed OTG devices, Embedded Hosts and peripherals are supported through the USB On-The-Go and Embedded Host Supplement to the USB 3.0 specification.
Read more about this topic: USB On-The-Go