Datasheet

Table Of Contents
Section 15 Universal Serial Bus Interface (USB)
REJ09B0140-0900 Rev. 9.00 Page 561 of 846
Sep 16, 2010
H8S/2215 Group
(4) Status Stage (Control-In)
The control-in status stage starts with an OUT token from the host. The firmware receives 0-byte
data from the host, and ends control transfer.
USB function Firmware
Receive OUT token
0-byte reception from host
End of control transfer
Set EP0o receive
complete flag
(EP0oTS UIFR0 = 1)
Clear EP0o receive
complete flag
(EP0oTS in UIFR0 = 0)
Write 1 to EP0o read
complete bit
(EP0oRDFN in UTRG0 = 1)
End of control transfer
ACK
EXIRQx
Figure 15.16 Status Stage Operation (Control-In)