Split bus operation - universal serial bus , Computer Engineering

Assignment Help:

Split Bus Operation - universal serial bus :

 

234_Split Bus Operation.png

USB 2.0 devices utilize a special protocol in the reset time that is called "chirping", to negotiate the high speed mode having the host/hub. A component that is HS capable first connects as an FS components (D+ pulled high), but upon retaining a USB RESET (both D+ and D- driven LOW by host for 10 to 20 mS) it pulls the D- line high which is known as chirp K. it indicates to the host that the device is high speed. If the host/hub is also HS capable then it chirps (returns alternating K and J states on D+ and D- lines) letting the components know that the hub will operate at high speed. The device has to retain at least 3 sets of KJ chirps before it changes to high speed terminations and start high speed signaling. Because USB 3.0 use wiring separately and in additional to that used by USB 2.0 and USB 1.x  that type of speed negotiation is not needed. Clock tolerance power is 480.00 Mbit/s ±500 ppm, 12.000 Mbit/s ±2500 ppm, 1.50 Mbit/s ±15000 ppm.

While high speed components are commonly referred to as "USB 2.0" and advertised as "up to 480 Mbit/s", not all USB 2.0 are high speed components. The USB-IF certifies devices and provides licenses to use special marketing logos for either high speed or basic speed (low and full) after passing a compliance test and paying a licensing fee. All of the devices are tested according to the latest specification, so newly-compliant low speed devices are also 2.0 devices.


Related Discussions:- Split bus operation - universal serial bus

Explain difference between risc and cisc, RISC-Means Reduced Instruction Se...

RISC-Means Reduced Instruction Set Computer. A RISC system has decreased number of instructions and more significantly it is load store architecture were pipelining can be executed

Explain memory write operation, Q. Explain Memory Write operation? Memo...

Q. Explain Memory Write operation? Memory write operation transfers content of a data register to a memory word M selected by the address. Presume that data of register R1 is t

Define user space, Define user space? The system space is divided from ...

Define user space? The system space is divided from virtual address space in which the user application programs reside. The letter space is known as user space.

Algorithm of non-repudiation designing e-cash based system, Give a suitable...

Give a suitable algorithm of non-repudiation in designing e-cash based system. The algorithm of non-repudiation in designing e-cash based system is as illustrated below: Ke

What is a daemon, What is a Daemon? A daemon is a method that detaches ...

What is a Daemon? A daemon is a method that detaches itself from the terminal and runs, disconnected, in the background, waiting for requests and responding to them. It can als

Explain program level of parallel processing, Program Level This is nor...

Program Level This is normally the liability of OS (operating system) that runs processes simultaneously. Different programs are generally independent of each other. So paralle

Floating point arithmetic pipelines, Floating point Arithmetic pipelines ...

Floating point Arithmetic pipelines Floating point computations are the finest candidates for pipelining. Take the instance of addition of two floating point numbers. Following

Performance instrumentation in parallel computer, Performance instrumentati...

Performance instrumentation focuses on how to resourcefully collect information about computation of parallel computer. Method of instrumentation mostly tries to capture informatio

Illustrate about system memory-management mode, Memory - management mode ...

Memory - management mode System memory-management mode (SMM) is on the same level as protected mode, real mode and virtual mode though it is provided to function as a manager

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd