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SH7721 Datasheet(PDF) 901 Page - Renesas Technology Corp

Part # SH7721
Description  Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7700 Series
PDF  1524 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

SH7721 Datasheet(HTML) 901 Page - Renesas Technology Corp

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Section 25
USB Function Controller (USBF)
Rev. 3.00 Jan. 18, 2008 Page 839 of 1458
REJ09B0033-0300
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
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 25.5
Transfer Stages in Control Transfer



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