SH7720 Datasheet, PDF (901/1524 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7700 Series

Section 25 USB Function Controller (USBF)
25.4.3 Control Transfer
Control transfer consists of three stages: setup, data (not always included), and status (figure 25.6).
The data stage comprises several bus transactions. Operation flowcharts for each stage are shown
below.
Control-in
Setup stage
SETUP(0)
DATA0
Control-out
SETUP(0)
DATA0
No data
SETUP(0)
DATA0
IN(1)
DATA1
OUT(1)
DATA1
Data stage
IN(0)
DATA0
...
IN(0/1)
DATA0/1
OUT(0)
DATA0
. . . OUT(0/1)
DATA0/1
Status stage
OUT(1)
DATA1
IN(1)
DATA1
IN(1)
DATA1
Figure 25.5 Transfer Stages in Control Transfer
Rev. 3.00 Jan. 18, 2008 Page 839 of 1458
REJ09B0033-0300