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The USB standard
defined a simple four-wire interface with the primary purpose
to make connecting PCs, peripherals and consumer electronics
flexible and easy. TI's high-performance portfolio includes
fully compliant USB hub controllers, peripheral devices, transceivers,
power management products and streaming audio devices. In
addition to a broad range of silicon solutions, TI has the
support tools, software, documentation and systems expertise
to help simplify design and speed your time to market.
USB hub controllers: Hubs provide the electrical
interface between USB devices and the host. Hubs are directly
responsible for supporting many of the attributes that make
USB user-friendly and hide its complexity. The hub provides
additional connection points beyond those provided by a host
implementation and re-broadcasts all traffic it sees on its
upstream-facing port (toward the host) on its downstream-facing
(toward the targets) ports.
USB peripheral devices: A USB peripheral
is where most of us have experienced USB. It is a logical
or physical entity that performs a specific function. Common
USB peripherals available today include keyboards, mice, printers,
flash-memory sticks, external drives, portable audio players
and digital still cameras (DSCs).
USB On-the-Go (OTG) devices: USB OTG is an addendum to the USB 2.0 specification that defines a new class of devices. This class of devices is intended to extend the functionality of a peripheral product to include limited host capabilities. As the name implies, the original target of the specification was portable devices with which end users may have wanted to share data when a computer was not available. Usage examples include sharing contact information between two PDAs or cell phones, sharing pictures from one DSC or camera phone with another, or printing directly from a DSC or PDA.
USB transceivers: Transceivers (sometimes referred to as PHYs) are used with processors or FPGAs that have the core logic integrated on chip but need the analog signaling portion external to the processor, usually due to technology mis-match between the advanced digital circuitry and the mixed-signal analog circuitry of the transceiver. Currently, Texas Instruments has a range of USB full-speed compliant transceivers that each have interfaces for different processors and are drop-in, second-source solutions for various competitors. Look for newly developed high-speed transceivers coming in 2009.
USB port protection: ESD transient
voltage suppression devices protect USB devices from harmful
ESD events. These devices clamp ESD over-voltage before it
can reach your USB interface device. TI offers devices for
use with USB 2.0, low-speed (1.5 Mbps), full-speed (12 Mbps)
and high-speed (480 Mbps).
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