SH7280 Datasheet, PDF (1381/1726 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine family

Section 25 USB Function Module
25.5.3 Control Transfer
Control transfer consists of three stages: setup, data (not always included), and status (figure 25.4).
The data stage comprises a number of 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 25.4 Transfer Stages in Control Transfer
Rev. 1.00 Jun. 26, 2008 Page 1351 of 1692
REJ09B0393-0100