Software – General Concepts

The General USB Process

 

How Data is Transferred in USB

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Frame

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Transfer

 

 

 

 

Transfer

 

 

 

 

 

 

 

 

 

 

 

There are 4 types of data transfer:

TM

1.Interrupt

2. Bulk

3.Isochronous

4.Control

The type of transfer depends upon the type of device and its data requirements (this is discussed in more detail later).

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Freescale Semiconductor TWR-MCF52259-Ethenet manual General USB Process