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USB Device Controller
Figure 27.
USB Device Reset Handler Flowchart
USB reset handler
Clear endpoint
transaction and
control transfer flags.
specific actions
specific actions
specific actions
to mark device
suspend mode
164
Universal Serial Bus (USB)
No
DEVSTAT.
USB_RESET
= 1?
Yes
Application-
to clear app
RX and TX
buffers
Application-
to mark all
endpoints
unhalted
Application-
as not in
Inform application
that the USB
reset has completed
and that device is in
default state.
Application-
specific actions
to clear app
config, alt.
I/F .
Application-
specific actions
to mark device
as not remote
wake-enabled
Application-
specific actions
to clear local
copy of frame
number
Set IRQ_SRC.DS_CHG
to clear the interrupt.
End of USB reset
= 1
handler
SPRU761A
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