the usb generation
DESCRIPTION
The next generation device USB, it defines the cable connector and communication protocols.TRANSCRIPT
THE USB GENERATION
USB Universal Serial Bus
It enables the communication
between devices and a
host controller.
Brief Overview Of
USB
Invented by Amir Ban, Dov Moran, Oron
Ogdan in April 1999.
Purpose Of USB Development
Standardize the connection of
computer peripherals
To communicate and supply electric power.
To replace serial and parallel ports as well as separate power chargers
for portable devices.
Different Specifications &
Types
USB 1.1
USB 2.0 USB 3.0
2 Types
A-TypeB-Type
USB 1.1
Introduced in January 1996 with data transfer speed of 1.5 Mbits/s in low speed
and 12 Mbits/sec in full speed.
USB 2.0
Introduced in April 2000 with high speed data transfer rate up to 480 Mbits/sec.
USB 3.0
•Published on 12th November 2008 with high speed data transfer rate up to 5Gbits/sec.• Main purpose is to decrease power consumption and increase data transfer speed.
Latest UpdateUSB 3.1
Developed in January 2013
Data transfer rate 10 Gbits/sec
Let’s the devices with larger energy
demands
Having bidirectional port
on each side
Consists of lightening connector can be
inserted upside down or right side up
USB 3.1 With Type-C cable
System Designing Of
USB
•Consists of a host connected to other peripherals in star topology.
•The USB host implements multiple host controllers.
•The host hub otherwise known as the root hub.
HubOr
Host
Star Topology
Computer
How the device communicate?
The communication based on pipe.Pipe is the connection between host & the end point.All are connected with one to one end points.
One –One Communication
StreamMessage
Types Of Pipe
Stream Pipe
It is an uni-directional pipe.Connected to a uni-directional end point
Message Pipe
It is a bi-directional pipe.
Used for control transfers.
Process Data Transfer
Isochronous
3 Processes
Interrupt
Bulk
Isochronous transfer provides proper data rate but with
data loss.
Interrupt transfer provides quick response.
Large sporadic transfer using bandwidth.
Thanking You
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