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SH7101 Datasheet(PDF) 358 Page - Renesas Technology Corp |
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SH7101 Datasheet(HTML) 358 Page - Renesas Technology Corp |
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358 / 560 page  Section 10 Serial Communication Interface (SCI) Rev.1.00 Sep. 18, 2008 Page 324 of 522 REJ09B0069-0100 10.6.5 Simultaneous Serial Data Transmission and Reception (Clocked Synchronous Mode) Figure 10.20 shows a sample flowchart for simultaneous serial transmit and receive operations. The following procedure should be used for simultaneous serial data transmit and receive operations after the SCI initialization. To switch from transmit mode to simultaneous transmit and receive mode, after checking that the SCI has finished transmission and the TDRE and TEND flags are set to 1, clear TE to 0. Then simultaneously set TE and RE to 1 with a single instruction. To switch from receive mode to simultaneous transmit and receive mode, after checking that the SCI has finished reception, clear RE to 0. Then after checking that the RDRF and receive error flags (ORER, FER, and PER) are cleared to 0, simultaneously set TE and RE to 1 with a single instruction. |
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