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H8SX/1663M 데이터시트(PDF) 1045 Page - Renesas Technology Corp

부품명 H8SX/1663M
상세설명  Renesas 32-Bit CISC Microcomputer H8SX Family / H8SX/1600 Series
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제조업체  RENESAS [Renesas Technology Corp]
홈페이지  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

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Section 20 USB Function Module (USB)
Rev. 2.00 Sep. 24, 2008 Page 1013 of 1468
REJ09B0412-0200
(1)
Setup Stage
USB function
Application
SETUP token reception
Receive 8-byte command
data in EP0s
To data stage
Set setup command
reception complete flag
(IFR0.SETUP TS = 1)
Automatic
processing by
this module
Clear SETUP TS flag
(IFR0.SETUP TS = 0)
Clear EP0i FIFO (FCLR.EP0iCLR = 1)
Clear EP0o FIFO (FCLR.EP0oCLR = 1)
Read 8-byte data from EP0s
Decode command data
Determine data stage direction*1
Write 1 to EP0s read complete bit
(TRG.EP0s RDFN = 1)
To control-in
data stage
To control-out
data stage
Command
to be processed by
application?
Interrupt request
Yes
No
Notes: 1. In the setup stage, the application analyzes command data from the host requiring processing by
the application, and determines the subsequent processing (for example, data stage direction, etc.).
2. When the transfer direction is control-out, the EP0i transfer request interrupt required in the status
stage should be enabled here. When the transfer direction is control-in, this interrupt is not required
and should be disabled.
*2
Figure 20.12 Setup Stage Operation



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