Handshake packets - computer architecture, Computer Engineering

Handshake packets:

Handshake packets consist of nothing but a PID byte, and are usually sent in response to data packets. The 3 basic types are, NAK, indicating that the data cannot be retain at this time ACK, indicating that data was successfully retain and should be retried, and STALL, indicating that the device has an error and will never be able to successfully transfer data till some corrective action (e.g. device initialization) is performed.

USB 2.0 added 2 extra handshake packets called NYET which indicates that a split transaction is not still complete. A NYET packet is also used to tell the host that the receiver has accepted a data packet, but cannot accept any more for reason to buffers being full. Then the host will send PING packets and will continue along data packets once the components ACK's the PING. The other packet which is added was the ERR handshake to indicate that a split transaction failed. Only handshake packet the USB host may generate is called ACK; if it is not prepared to retain data, it should not instruct a component to send any.

 

 

Posted Date: 10/13/2012 7:47:44 AM | Location : United States







Related Discussions:- Handshake packets - computer architecture, Assignment Help, Ask Question on Handshake packets - computer architecture, Get Answer, Expert's Help, Handshake packets - computer architecture Discussions

Write discussion on Handshake packets - computer architecture
Your posts are moderated
Related Questions
What are the characteristics of SRAM? SRAM are fast They are volatile They are of high cost Less density

A given microprocessor has words of 1 byte.  What is the smallest and largest integer that can be characterized in the following representations?   a) unsigned b) sign- ma

PCI bus transactions: PCI bus traffic is prepared of a series of PCI bus transactions. Each transaction is build up of an address phase that is followed by 1 or more data phas

What are the advantages of CMOS logic Ans: Advantages of CMOS Logic: (i) The power dissipation is mini-mum of all the logic families (ii) LSI and VLSI are possible

Object-Oriented Control Architecture For Ams Manufacturing Introduction     In recent past, the industrial sectors have started presenting additional inclination toward

What is vertical organization and horizontal organization? Highly encoded schemes that use compact codes to state only a small number of control functions in every microinstruc

Analysis describes about the logical and statistical analysis needed for an efficient output. This involves writing of code and performing calculations, but most part of these lang

The data structure required to convert a recursion to an iterative procedure is  Stack is the data structure required to convert a recursion to an iterative procedure

In a time multiplexed space switching system, one speech sample appears every? One speech sample shows every 125 micro sec, in a time multiplexed space switching system.

General purpose register - assembly language: Basic ISA Classes: Accumulator: 1 address add Aacc ←acc + mem [A] Stack: 0 address add to s ←to s+ next G