Hardware Reference
In-Depth Information
Inaddition tothemodified connector assemblies, theUSB3.0cable iconshownin
Figure
14.12
denotes cables that are compliant with the USB 3.0 specification.
Figure 14.12
SuperSpeed USB 3.0 cable icon.
The USB 3.0 specification also includes provisions for optical connectors, which might
be used by some devices in the future.
USB On-The-Go
InDecember2001,theUSB-IFreleasedasupplementtotheUSB2.0standardcalled
USB
On-The-Go
. This was designed to address the one major shortcoming of USB—that a PC
was required to transfer data between two devices. In other words, you could not connect
two cameras and transfer pictures between them without a PC orchestrating the transfer.
WithUSBOn-The-Go,devicesthatconformtothespecificationstillworknormallywhen
they are connected to a system, but they also have additional capabilities when connected
to other devices supporting the standard.
Although this capability can also work with USB-based PC peripherals, it was mainly ad-
ded to address issues using USB devices in the consumer electronics area, where a PC
