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Figure 13.
Prepare for USB RX Transfers Routine
Prepare for USB
RX transfers
routine
Any OUT
Yes
endpoint
configured ?
(EPn)
No
End of prepare for
USB RX transfers
routine
SPRU761A
Note: This applies to all non-
ISO endpoints, with or
without DMA.
Yes
Device is
ready to receive
data for
EPn ?
This enables both
FIFOs if double-buffering
Write EP_NUM register:
− EP_NUM.EP_NUM = n
− EP_NUM.EP_DIR = 0
− EP_NUM.EP_SEL = 0
− EP_NUM.SETUP_SEL = 0
Yes
Another
OUT endpoint
configured ?
(EPn)
No
Universal Serial Bus (USB)
USB Device Controller
is used.
Set CTRL.
Set_FIFO_EN
143
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