Usages of OTG in 2020
USB On-The-Go ( USB OTG or just OTG ) is a specification first used in late 2001 that allows USB devices , such as tablets or smartphones , to act as a host, allowing other USB devices, such as USB flash drives , digital cameras , mice or keyboards , to be attached to them. Use of USB OTG allows those devices to switch back and forth between the roles of host and device. A mobile phone may read from removable media as the host device, but present itself as a USB Mass Storage Device when connected to a host computer. USB OTG introduces the concept of a device performing both master and slave roles – whenever two USB devices are connected and one of them is a USB OTG device, they establish a communication link . The device controlling the link is called the master or host, while the other is called the slave or peripheral. USB OTG defines two roles for devices: OTG A-device ...