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H8S2245 데이터시트(PDF) 500 Page - Renesas Technology Corp |
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H8S2245 데이터시트(HTML) 500 Page - Renesas Technology Corp |
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500 / 818 page ![]() Section 12 Serial Communication Interface (SCI) Rev.3.00 Mar. 26, 2007 Page 458 of 772 REJ09B0355-0300 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 service routine TEI interrupt request generated TXI interrupt request generated TXI interrupt request generated Figure 12.17 Example of SCI Operation in Transmission Serial data reception (clocked synchronous mode): Figure 12.18 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 clocked 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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