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Moteur de recherche de fiches techniques de composants électroniques |
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Moteur de recherche de fiches techniques de composants électroniques |
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H8SX1663 Fiches technique(PDF) 850 Page - Renesas Technology Corp |
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H8SX1663 Fiches technique(HTML) 850 Page - Renesas Technology Corp |
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850 / 1158 page  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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