SH7216 Datasheet, PDF (26/32 Pages) Renesas Technology Corp – USB Mass Storage Class

SH7216 Group
USB Function Module: USB Mass Storage Class
Figures 8 to 10 show the processing when a data transport error occurs.
Start
CBW is received
NO
Is CBW data valid?
Command
transport
YES
Amount of data planned by
host=0 while
Amount of data planned by
function !=0
NO
YES
Data transport direction is
judged from CBW
Bulk-in
Bulk-out
CASE: (2) (3)
H'02 is set in
bCSWStatus
Data
transport
Bulk-in operation in
data transport
Bulk-out operation in
data transport
EP2 is stalled
Status
transport
CSW is sent
End
Figure 8 Error Processing Flow in Data Transport (1)
REJ06B0897-0100/Rev.1.00
July 2009
Page 26 of 32