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H8SX/1663 데이터시트(PDF) 850 Page - Renesas Technology Corp

부품명 H8SX/1663
상세설명  Renesas 32-Bit CISC Microcomputer H8SX Family / H8SX/1600 Series
PDF  1158 Pages
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제조업체  RENESAS [Renesas Technology Corp]
홈페이지  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

H8SX/1663 데이터시트(HTML) 850 Page - Renesas Technology Corp

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Section 16 USB Function Module (USB)
Rev.1.00 Jun. 07, 2006 Page 798 of 1102
REJ09B0294-0100
(3) Data Stage (Control-Out)
USB function
Application
OUT token reception
Data reception from host
OUT token reception
Set EP0o reception
complete flag
(IFR0.EP0o TS = 1)
Clear EP0o reception
complete flag
(IFR0.EP0o TS = 0)
Read data from EP0o
receive data size register
(EPSZ0o)
Write 1 to EP0o read
complete bit
(TRG.EP0o RDFN = 1)
Read data from EP0o
data register (EPDR0o)
1 written
to TRG.EP0s
RDFN?
1 written
to TRG.EP0o
RDFN?
NACK
NACK
ACK
No
Yes
No
Yes
Interrupt request
Figure 16.12 Data Stage (Control-Out) Operation
The application 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 out-
transfer, the application waits for data from the host, and after data is received (EP0oTS bit in
IFR0 = 1), reads data from the FIFO. Next, the application writes 1 to the EP0o read complete bit,
empties the receive FIFO, and waits for reception of the next data.
The end of the data stage is identified when the host transmits an IN token and the status stage is
entered.



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