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

Show the advantages of joint application development, Q. Show the advantage...

Q. Show the advantages of Joint Application Development? The following are the numerous advantages of Joint Application Development: Actively includes management and use

What is the use of system.data.dlinq.dll, System.Data.DLinq.dll gives funct...

System.Data.DLinq.dll gives functionality to work with LINQ to SQL.

Limits of traditional payment instruments and overcome, What are the restri...

What are the restrictions of traditional payment instruments? How are such restrictions overcome by electronic payment systems? The restrictions of traditional payment system a

IT-Infrasrtucture, Blue Sky events is an organisation that devices and runs...

Blue Sky events is an organisation that devices and runs large outdoor events. They have been commissioned to organise and run an event for four months over the summer period in a

What is an avl tree, What is an AVL tree? AVL Tree An AVL tree is...

What is an AVL tree? AVL Tree An AVL tree is a binary tree in which the dissimilarity in heights among the left and the right subtree is not more than one for each node.

Differentiate between public key and secret key encryption, What are the di...

What are the different between Public Key Encryption and Secret Key Encryption? Differentiate between Public Key Encryption and Secret Key Encryption: A cryptographic sys

What is micro operation, What is micro operation? A micro operation is ...

What is micro operation? A micro operation is an elementary operation performed with the data kept in registers.   1) Register transfer microoperation transfer binary inform

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

Processes vs threads, One might argue that in general processes are more ?e...

One might argue that in general processes are more ?exible than threads. For one thing, they can live in two different machines, and communicate via sockets; they are easy to spawn

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