Datasheet

Table Of Contents
Section 15 Universal Serial Bus Interface (USB)
Page 556 of 846 REJ09B0140-0900 Rev. 9.00
Sep 16, 2010
H8S/2215 Group
15.5.4 Control Transfer
The control transfer consists of three stages; setup, data (sometimes omitted), and status, as shown
in figure 15.12. The data stage consists of multiple bus transactions. Figures 15.13 to 15.17 show
operation flows in each stage.
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
Figure 15.12 Control Transfer Stage Configuration