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H8SX/1663M Datasheet(PDF) 1045 Page - Renesas Technology Corp |
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H8SX/1663M Datasheet(HTML) 1045 Page - Renesas Technology Corp |
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1045 / 1504 page  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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