HD6417641 RENESAS [Renesas Technology Corp], HD6417641 Datasheet - Page 818

• Manufacturer Part Number: HD6417641
• Manufacturer: RENESAS [Renesas Technology Corp]

Section 20 USB Function Module
20.4.3
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.
Rev. 4.00 Sep. 14, 2005 Page 768 of 982
REJ09B0023-0400
Control IN
Control OUT
No data
Control Transfer
Setup stage
SETUP(0)
SETUP(0)
SETUP(0)
DATA0
DATA0
DATA0
Figure 20.4 Transfer Stages in Control Transfer
OUT(1)
DATA1
DATA1
IN(1)
OUT(0)
DATA0
DATA0
Data stage
IN(0)
. . .
. . .
OUT(0/1)
DATA0/1
DATA0/1
IN(0/1)
Status stage
OUT(1)
DATA1
DATA1
DATA1
IN(1)
IN(1)