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

Differentiate between rom test and the ram test, Probelm : a) What is t...

Probelm : a) What is the purpose of "Jumps" in the 8051 Microcontroller? Describe three types of "Jumps". b) What is the purpose of a "call"? c) Differentiate between ROM

How music is produced and generated - cad, How music is produced and genera...

How music is produced and generated - CAD Computer software and hardware advances have changed how music is produced and generated. Some of the primary reasons for this have

Implementation using 8 to 1 multiplexer, Implement the following function u...

Implement the following function using 8 to 1 multiplexer Y(A, B, C, D) = ∑(0,1,2,5,9,11,13,15) Ans. We will obtain three variables B,C and D at selection lines and also A as i

What is supply chain management, What is Supply Chain Management? Suppl...

What is Supply Chain Management? Supply Chain Management: Supply Chain Management includes developing the performance of an organization's supply chain from its suppliers to

Which TTL logic gate is used for wired anding, Which TTL logic gate is used...

Which TTL logic gate is used for wired ANDing ? Ans. Open collector output, TTL logic gate is used.

Describe the operation of parallel in parallel out, Describe the operation ...

Describe the operation of parallel in parallel out (PIPO) shift register. Ans:  Parallel In Parallel Out: By the name suggests, in parallel in parallel out that is a

Which is not a valid page replacement policy, Which is not a valid page rep...

Which is not a valid page replacement policy? Ans. RU policy (Recurrently used) is not a valid page replacement policy.

How swapping increase overheads of the operating systems, Does swapping inc...

Does swapping increase the Operating Systems' overheads? Justify your answer. A process can be swapped out temporarily of memory to a backing store and after that brought back

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