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HD6432138SW Datasheet(PDF) 497 Page - Renesas Technology Corp |
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HD6432138SW Datasheet(HTML) 497 Page - Renesas Technology Corp |
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497 / 1061 page  Section 15 Serial Communication Interface (SCI, IrDA) Rev. 4.00 Jun 06, 2006 page 443 of 1004 REJ09B0301-0400 Transfer direction Bit 0 Serial data Serial clock 1 frame TDRE TEND Bit 1 Bit 7 Bit 0 Bit 1 Bit 7 Bit 6 Data written to TDR and TDRE flag cleared to 0 in TXI interrupt handling routine TEI interrupt request generated TXI interrupt request generated TXI interrupt request generated Figure 15.17 Example of SCI Operation in Transmission Serial Data Reception (Synchronous Mode): Figure 15.18 shows a sample flowchart for serial reception. The following procedure should be used for serial data reception. When changing the operating mode from asynchronous to synchronous, be sure to check that the ORER, PER, and FER flags are all cleared to 0. The RDRF flag will not be set if the FER or PER flag is set to 1, and neither transmit nor receive operations will be possible. |
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