r4f2456 Renesas Electronics Corporation., r4f2456 Datasheet - Page 990

• Manufacturer Part Number: r4f2456
• Description: 16-bit Single-chip Microcomputer H8s Family / H8s/2400 Series
• Manufacturer: Renesas Electronics Corporation.

Section 16 USB Function Module (USB)
16.5.5
Control transfer consists of three stages: setup, data (not always included), and status (figure
16.10). The data stage comprises a number of bus transactions. Operation flowcharts for each
stage are shown below.
Rev. 1.00 Sep. 19, 2008 Page 960 of 1342
REJ09B0467-0100
Control-in
Control-out
No data
Control Transfer
Setup stage
SETUP(0)
SETUP(0)
SETUP(0)
Figure 16.10 Transfer Stages in Control Transfer
DATA0
DATA0
DATA0
OUT(1)
DATA1
DATA1
IN(1)
OUT(0)
Data stage
DATA0
DATA0
IN(0)
. . .
. . .
OUT(0/1)
DATA0/1
DATA0/1
IN(0/1)
Status stage
OUT(1)
DATA1
DATA1
DATA1
IN(1)
IN(1)