Usb communication - computer architecture, Computer Engineering

Assignment Help:

Data packets:

USB communication takes the form of packets. Originally, all packets are sent from the host, using the root hub and possibly more hubs, to components. Some of those packets direct a device to send some packets in reply.

After the sync field discussed above, all packets are made of 8-bit bytes, transmitted least-significant bit first. First byte is a packet identifier (PID) byte. The PID is in fact 4 bits; the byte consists of the 4-bit PID followed by its bitwise complement. It redundancy helps detect errors. (Note that a PID byte contains at most 4 consecutive 1 bits, and consequently will never require bit-stuffing, even when combined with the last 1 bit in the sync byte. though, trailing 1 bits in the PID may need bit-stuffing within the first few bits of the payload.)

1173_USB communication.png

 


Related Discussions:- Usb communication - computer architecture

What can digital circuits do?, Circuits can be designed to implement a spec...

Circuits can be designed to implement a specifictaske.g. a simple circuit could compare two inputvoltages and give a high output if they matched anda low output if they did not mat

Design a mod-6 synchronous counter, Design a MOD-6 synchronous counter usin...

Design a MOD-6 synchronous counter using J-K Flip-Flops. Ans: Design of Mod-6 Counter:   To design the Mod-6 synchronous counter, contain six counter states (that is, from

What are the two aspects of locality of reference, What are the two aspects...

What are the two aspects of locality of reference? Define them. Two aspects of locality of reference are temporal aspects and spatial aspect. Temporal aspect is that a r

Analysis of parallel algorithms, A generic algorithm is mostly analysed on ...

A generic algorithm is mostly analysed on basis of subsequent parameters: the space complexity (amount of space required) and the time complexity (execution time). Generally we giv

Computer based accounting systems, For the purposes of this assignment, you...

For the purposes of this assignment, you are the accountant for an industrial property development company, Devprop Leasing Co., that typically develops warehouse and industrial co

Important points of simulations, Important points of simulations In thi...

Important points of simulations In this simulation it is essential to consider: (1)  What and how data is gathered (2)  How simulation is done (3)  How system would wo

Define file record length, Define File record length ? File record leng...

Define File record length ? File record length must be selected to match the data characteristics.

Transition management system, please help me with psudocode for schedule ma...

please help me with psudocode for schedule management which contains stakeholder and application table

Chains of inference, Chains of Inference: Now we have to look at how t...

Chains of Inference: Now we have to look at how to get an agent to prove a given theorem using various search strategies? Thus we have noted in previous lectures that, there i

Expert systems, An expert systems is software that contains a knowledge ...

An expert systems is software that contains a knowledge base of facts and relationships and has the ability to make inferences based on that knowledge base. An experts sys

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