
TM
S
o
ft
w
a
re
–
G
en
er
a
l
C
o
n
ce
p
ts
The General USB Process
How Data is Transferred in USB
Frame
Transfer
Transfer
There are 4 types of data transfer:
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).