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CHAPTER 30 USB Mini-host
30.6
Token Flow Chart
The flow chart of each USB Mini-host token.
■ IN, OUT, SETUP Token
812
Figure 30.6-1 Flow Chart at IN, OUT, SETUP Token
IN,OUT,
SETUP TOKEN
YES
HADR change?
NO
YES
IN TOKEN
NO
YES
EP1 DIR=1?
NO
YES
EP2C PKS
change?
NO
NO
Buffer direction
OK?
YES
NO
Buffer usable?
YES
Set toggle and Endpoint,
Execute TOKEN
NO
CMPIRQ of
HIRQ=1?
YES
END
HADR change
YES
EP1 DIR=1?
NO
NO
EP1 PKS
change?
YES
PKS change
Buffer direction change
Set Buffer usable
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