Figure 18.4 List Service Flow - Hitachi HD64465 User Manual

Read
HEAD pointer
HEAD pointer
= 0?
NO
ISOCHRONOUS
ED?
YES
YES
ISO List
Enabled?
NO
FINISHED
YES
Control/Bulk
Ratio Satisfied?
Rev. 3.0, 03/01, page 268 of 390
YES Peridoc List?
NO
Hc _ _ _ _ CurrentED
= 0?
YES
NO
NO
Service Endpoint
YES
Descriptor
YES BULK List?
NO
YES CONTROL List?
NO

Figure 18.4 List Service Flow

SERVICE
LIST
List
YES NO
Enabled?
_ _ _ _Filled = 1?
(Bulk or Control)
NO
FINISHED
NO
ISOCHRONOUS
ED?
NO
NO NextED = 0?
FINISHED
Set
YES Hc _ _ _ _ CurrentED =
Hc _ _ _ _ HeadED
Set
_ _ _ _Filled = 0
Hc_ _ _ _CurrentED =
YES
0?
NO
YES
ISO List
YES
Enabled?
NO
YES FINISHED