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SH7721 Datasheet(PDF) 693 Page - Renesas Technology Corp |
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SH7721 Datasheet(HTML) 693 Page - Renesas Technology Corp |
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693 / 1524 page  Section 18 Serial Communication Interface with FIFO (SCIF) Rev. 3.00 Jan. 18, 2008 Page 631 of 1458 REJ09B0033-0300 (5) Data Transfer Operations (Serial Data Reception) Figure 18.15 shows sample flowcharts for serial reception. No Yes 1. Set the receive trigger number in SCFCR. 2. Reception is started when the RE bit in SCSCR is set to 1. 3. Read receive data while the RDF bit is 1. 4. After the end of reception, clear the RE bit to 0. Start of reception Set receive trigger number in RTRG1 and RTRG0 in SCFCR Set RE bit in SCSCR When using receive FIFO data interrupt, set RIE bit to 1 RDF =1? Read receive trigger number of receive data bytes from SCFRDR Clear RE bit in SCSCR to 0 End of reception 1 2 3 4 Figure 18.15 Sample Serial Reception Flowchart (1) (First Reception after Initialization) |
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