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SH7721 Datasheet(PDF) 912 Page - Renesas Technology Corp |
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SH7721 Datasheet(HTML) 912 Page - Renesas Technology Corp |
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912 / 1524 page  Section 25 USB Function Controller (USBF) Rev. 3.00 Jan. 18, 2008 Page 850 of 1458 REJ09B0033-0300 SOF is broken SOF reception Yes Out-token reception From figure 25.14 FIFO A side FIFO A side FIFO B side FIFO B side Data transmitted from host is broken FIFO buffer switch over No Out-token reception No error in receive data? Data reception from host Set EP4 abnormal reception flag to 1 (IFR3/EP4 TF = 1) Set EP4 normal reception flag to 1 (IFR3/EP4 TS = 1) Clear time out flag (IFR4/TMOUT = 0) Interrupt end Interrupt end Read time stamp register H, L (TSRH,TSRL) Clear SOF packet detection flag (IFR2/SOF = 0) Interrupt request (Time out) Interrupt request (SOF) USB function Firmware Time stamps do not match A Figure 25.15 EP4 Isochronous-Out Transfer Operation (SOF is Broken) |
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