Datasheet

Table Of Contents
Section 15 Universal Serial Bus Interface (USB)
Page 558 of 846 REJ09B0140-0900 Rev. 9.00
Sep 16, 2010
H8S/2215 Group
(2) Data Stage (Control-In)
The firmware first analyzes command data from the host in the setup stage, and determines the
subsequent data stage direction. If the result of command data analysis is that the data stage is in-
transfer, one packet of data to be sent to the host is written to the FIFO. If there is more data to be
sent, this data is written to the FIFO after the data written first has been sent to the host (EP0iTS of
UIFR0 is set to 1).
The end of the data stage is identified when the host transmits an OUT token and the status stage
is entered.