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 the working of hundred-line exchange, In a hundred-line exchange 24...

In a hundred-line exchange 24 two-motion selectors are used. Draw the schematic you suggest for this exchange and explain its working. How many simultaneous calls can be made durin

Why java is called machine independent, Why Java is called Machine Independ...

Why Java is called Machine Independent? While a java program is compiled this is not converted in an executable code. Rather, this is converted in a byte code. Byte code is hig

Describe characteristics needed for an e-commerce server, Describe the addi...

Describe the additional characteristics needed for an e-commerce server? E-commerce services need dynamic configuration abilities and seasonal and every day service configurat

Illustrate about fourth generation computers, Q. Illustrate about fourth ge...

Q. Illustrate about fourth generation computers? One of the main milestones in IC technology is Very large scale integration (VLSI) where thousands of transistors can be integr

Why are interrupt masks provided in any processor, Why are interrupt masks ...

Why are interrupt masks provided in any processor? Interrupt mask enable the higher priority devices comes first and there for lower priority devices comes last. The interrupt

Safety argument for good design, So far we have considered the problems of ...

So far we have considered the problems of poor ID in terms of the loss of productivity and efficiency to business. There is another important aspect to consider: the issue of safet

Explain vector processing with pipelining, Vector Processing with Pipelinin...

Vector Processing with Pipelining Because in vector processing vector instructions execute the similar computation on various data operands repeatedly, vector processing is the

Embedded software, Embedded Software Intelligent products have becom...

Embedded Software Intelligent products have become commonplace for all consumer and industrial market. Embedded software stays in read only memory and is utilised to control

What is page frame, What is page frame? An area in the main memory that...

What is page frame? An area in the main memory that can hold single page is called as page frame.

Explain technical reasons which made microsoft withdraw, Explain technical ...

Explain technical reasons which made Microsoft withdraw its support for VBA in Mac? Ans) The reasons which made Microsoft drop its carry to VBA are as follows, Microsoft visual

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