Renesas HD6417641 用户手册

Section 20   USB Function Module 

Rev. 4.00  Sep. 14, 2005  Page 768 of 982 

REJ09B0023-0400 

 

Control transfer consists of three stages: setup, data (not always included), and status (figure 20.4). 
The data stage comprises a number of bus transactions. Operation flowcharts for each stage are 
shown below. 

Control IN

Setup stage

Data stage

Status stage

Control OUT

No data

SETUP(0)

DATA0

SETUP(0)

DATA0

SETUP(0)

DATA0

IN(1)

DATA1

OUT(1)

DATA1

IN(0)

DATA0

OUT(0)

. . .

. . .

DATA0

IN(0/1)

DATA0/1

OUT(0/1)

DATA0/1

OUT(1)

DATA1

IN(1)

DATA1

IN(1)

DATA1