Texas Instruments TMS320DM357 - Manual (Page 51)

Completion of
IN data phase
OUT token sent
?
received
Stall
No
Yes
Yes
No
RxStall set
TxPktRdy cleared
Error Count cleared
interrupt generated
Command could
not be completed
TxPktRdy cleared
Error Count cleared
Interrupt generated
Yes
?
No
ACK
received
Transaction
complete
No
NAK
received
?
Yes
?
NAK limit
reached
No
Yes
Error count
cleared
incremented
Error count
NAK Timeout set
Endpoint halted
Interrupt generated
?
Error
count=3
No
Error bit set
TxPktRdy cleared
Error Count cleared
interrupt generated
Yes
Implies problem
at peripheral end
of connection.
Transaction deemed
complete
TxPktRdy
and StatusPkt
both set
?
Zero−length
DATA1 packet sent
www.ti.com USB Controller Host and Peripheral Modes Operation
Figure 13. Completion of IN Data Phase Flow Chart
SPRUGH3 – November 2008 Universal Serial Bus (USB) Controller 51
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