K60P100M100SF2RM Datasheet, PDF (1234/1809 Pages) Freescale Semiconductor, Inc – K60 Sub-Family Reference Manual

Introduction
The host initiates transactions to specific peripherals, while the device responds to control
transactions. The device sends and receives data to and from the host using a standard
USB data format. USB 2.0 full-speed /low-speed peripherals operate at 12Mb/s or 1.5
Mb/s.
For additional information, refer to the USB 2.0 specification.
Host PC
Host
Software
Root
Hub
External Hub
USB Cable
USB Cable
External Hub
USB Cable
USB Cables
USB Peripherals
Figure 45-1. Example USB 2.0 System Configuration
45.1.2 USB On-The-Go
USB (Universal Serial Bus) is a popular standard for connecting peripherals and portable
consumer electronic devices such as digital cameras and hand-held computers to host
PCs. The On-The-Go (OTG) Supplement to the USB Specification extends USB to peer-
to-peer application. Using USB OTG technology consumer electronics, peripherals and
portable devices can connect to each other (for example, a digital camera can connect
directly to a printer, or a keyboard can connect to a Personal Digital Assistant) to
exchange data.
With the USB On-The-Go product, you can develop a fully USB-compliant peripheral
device that can also assume the role of a USB host. Software determines the role of the
device based on hardware signals, and then initializes the device in the appropriate mode
of operation (host or peripheral) based on how it is connected. After connecting the
devices can negotiate using the OTG protocols to assume the role of host or peripheral
based on the task to be accomplished.
For additional information, refer to the On-The-Go Supplement to the USB 2.0
Specification.
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K60 Sub-Family Reference Manual, Rev. 6, Nov 2011
Freescale Semiconductor, Inc.